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Analysis of Stable Isotopes of Xylem Water from Plantation Trees in E. Transvaal and Zululand Indicate they Utilised Ground water During Drought of 1992
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.J. Midgley --- , South Africa S. Talma --- , South Africa D. Scott --- , South Africa B. Olbrich --- , South Africa G.F. van Wyk --- , South AfricaWe investigated the stable isotopic signature of xylem sap of mature plantation trees and the associated ground water at sites in Zululand and E. Transvaal. The survey took place mainly during the drought of 1992. Results indicated a range of... -
Commercial Forestry on Signal Hill and Lion's Head, Cape Town
Item type: Journal Article • Journal: South African Forestry Journal • Authors: Chrisna Joubert --- Department of Nature Conservation and Oceanography, Cape TownThe history of afforestation with alien tree species on Signal Hill and Lion's Head, which form part of the Table Mountain Nature Reserve, Cape Town, was reconstructed. The natural vegetation comprises mostly West Coast Renosterveld which is considered the most... -
Conservative stocking or maximum profit: A grazing management dilemma?
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), P.G. King --- Department of Agriculture (Eastern Cape Region),Swards in the False Thornveld of the Eastern Cape are generally stocked considerably in excess of the rate currently recommended for maximised production on a sustained basis. Economic analysis of the relationship between stocking rate and production per ha reveals... -
A mathematical model for assessing the influence of stocking rate on the incidence of droughts and for estimating the optimal stocking rates1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.J. Fouché --- Department of Agriculture (Free State Region), J.M. De Jager --- Department of Agrometeorology, D.P.J. Opperman --- Departments of Pasture Science,The Putu 11 simulation model was used to simulate veld production for each of 47 years, using weather input data and soil properties of a site at Glen. Grassland drought was defined as that condition encountered when 100 kg/ha or... -
Korttermyn invloed van strawwe droogte op veldtoestand en waterverbruiksdoeltreffendheid van grasveld in die sentrale Oranje‐Vrystaat
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.A. Snyman --- , Republiek van Suid‐Afrika W.L.J. van Rensburg --- , Republiek van Suid‐AfrikaShort‐term effect of severe drought on veld condition and water use efficiency of grassveld in the central Orange Free State. The impact of an intensive drought (1982/1983 and 1983/84‐growing seasons) on botanical composition, basal cover, mortality of grazing plants and... -
Assessment of recent drought severity for natural grassland at three locations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Dyer --- Crop Production Division, Canada J.M. de Jager --- Department of Agrometeorology, Republic of South AfricaThe relative severity of drought in natural grassland during three growing seasons was analyzed for three South African weather stations. Computer simulation of grassland water use, based upon weather records, was used to quantify drought and to compare the conditions... -
Leaf water retention of excised leaves as a measure of drought resistance in grain sorghum (Sorghum bicolor L. Moench) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa W.J. van den Berg --- , Republic of South AfricaThe objective of these experiments was to evaluate the usefulness of the excised leaf water retention capability (ELWRC) technique for screening grain sorghum genotypes for drought resistance. Seven genotypes were planted in a randomized block consisting of four replications. The... -
'n Vergelyking van koringkultivars ten opsigte van droogteverdraagsaamheid
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.D. Joubert --- , Republiek van Suid-Afrika'n Proef met vyf koringkultivars en twee vogpeile (50 en 80% van veldwaterkapasiteit) is in 'n glashuis uitgevoer. Kultivarverskiile in droëmateriaalakkumulasie is verkry by die lae vogpeil. Gamtoos het die grootste blaaroppervlakte en blaarmassa gehad by die vlagblaarstadium en uiteindelik... -
Changes in percentage moisture loss of excised leaves of seven field-grown grain sorghum genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South Africa W.J. van den Berg --- , Republic of South AfricaThe objectives of these experiments were to study the seasonal and diurnal changes in percentage moisture loss (PML) and correlated characteristics of excised leaves. Seven grain sorghum genotypes were planted in a randomized block design and their PML and the... -
The inheritance of percentage moisture loss in sorghum leaves
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe inheritance of drought resistance and agronomic characteristics of field-grown sorghum plants was determined. High heritabilities were recorded for each characteristic. The genetic differences of percentage moisture loss were due to genes exhibiting incomplete dominance. The agronomic characteristics of plant... -
Relationships between yield, base temperature and drought resistance in grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaThe object of this study was to investigate the interrelationship between yield, its components, base temperature and drought resistance of grain sorghum. Seven commercial cultivars and 27 F1 progenies were compared in two separate randomized block trials. A total of... -
The inheritance of drought resistance characteristics in grain sorghum seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W.G. Wenzel --- , Republic of South AfricaA factorial crossing method was used to study the inheritance of and the relationship between characteristics which are related to drought resistance in grain sorghum seedlings. The potential for improving drought resistance in grain sorghum seedlings was verified by the... -
A family of stochastic models for droughts
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. Zucchini --- Department of Statistical Sciences, Republic of South Africa P.T. Adamson --- , United Kingdom L. McNeill --- Department of Statistical Sciences, Republic of South AfricaThere is no single quantitative definition of a drought; what constitutes a drought depends both on water needs and on storage capabilities. In this paper a family of models is proposed which is sufficiently flexible to cover a range of... -
Drought-related protein synthesis in cotton
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. van der Mescht --- , Republic of South Africa J.A. de Ronde --- , Republic of South AfricaThe changes in protein profiles of six cotton cultivars subjected to osmotic stress were examined. Osmotic stress was applied by incubating leaf segments in mannitol. The efficiency of protein synthesis decreased with increasing concentrations of mannitol. Drought-related protein synthesis during... -
Protein turnover: possible contributing factor in determining drought tolerance in Nicotiana tabacum L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- Department of Plant and Soil Sciences, Republic of South Africa G. H.J. Krüger --- Department of Plant and Soil Sciences, Republic of South AfricaDrought stress-induced changes in the water-soluble protein concentration and total number of sulphydryl (-SH) groups were monitored under controlled environmental conditions in four tobacco cultivars (Nicotiana tabacum L.) with different drought tolerances. The drought stress ranged from light (-0.52 MPa)... -
Evaluation of proline accumulation as an indicator of drought tolerance in spring wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. D.R. van Heerden --- Department of Botany, Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South AfricaThe aim of this study was to evaluate proline accumulation as an indicator of drought stress and drought tolerance in spring wheat cultivars (Triticum aestivum L.) grown in the Western Cape. Drought stress was induced in whole plants and leaf... -
Evaluation of the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride as indicators of drought tolerance in spring wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. D.R. van Heerden --- Department of Botany, Republic of South Africa O.T. de Villiers --- Department of Botany, Republic of South AfricaThe aim of this study was to evaluate the relative water content and the reduction of 2,3,5-triphenyltetrazoliumchloride, as indicators of drought stress and drought tolerance in spring wheat cultivars (Triticum aestivum L.) grown in the Western Cape. Drought stress was... -
A technique to evaluate ENSO-based maize production strategies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, South Africa A.B. Potgieter --- Free State Department of Agriculture and Environmental Affairs, South AfricaDrought occurs frequently in southern Africa, which causes harm to crop production and food security. Atmospheric and oceanic phenomena such as EL Niño/Southern Oscilation (ENSO) may be used to forecast drought. Crop production strategies could then be adapted to mitigate... -
Boundary layer, stomatal geometry and -spacing, in relation to drought tolerance in four Nicotiana tabacum L. cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Van Rensburg --- , Republic of South Africa J. Peacock --- , Republic of South Africa G. H.J. Krüger --- Department of Plant and Soil Sciences, Republic of South AfricaAlthough numerous studies, both phenomenological and mathematical, have related gaseous interchanges at the plant leaf surface and atmospheric interface specifically with regard to drought tolerance, the important role of trichomes and the boundary layer has not been recognized. In this... -
The use of physiological parameters to identify drought tolerance in spring wheat cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.A. Strauss --- Department of Agronomy and Pastures, Republic of South Africa G.A. Agenbag --- Department of Agronomy and Pastures, Republic of South AfricaWheat crops produced under dryland conditions in the winter rainfall region of South Africa often experience periods of water stress. It is, therefore, important to identify spring wheat cultivars that can withstand these conditions. The multitude of factors potentially involved... -
Response of three sorghum (Sorghum bicolor L. Moench) varieties to soil moisture stress at different developmental stages
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Munamava --- Department of Agricultural Research, Botswana I. Riddoch --- , BotswanaThree varieties (Segaolane, Mahube and Phofu) of sorghum (Sorghum bicolor L. Moench) that were selected in Botswana, were water-stressed at the vegetative, booting and flowering stages in a pot experiment under glasshouse conditions. Stomatal conductance was reduced by water stress... -
Responses of Ethiopian durum wheat (Triticum turgidum var durum L.) genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Departments of Plant Sciences, South Africa M.T. Labuschagne --- Departments of Plant Sciences, South Africa A. T.P. Bennie --- Departments of Soil, Crop and Climate Sciences, South AfricaThe aim of this study was to identify yield components associated with drought tolerance in durum wheat. Twenty six durum wheat genotypes, from different agro-ecologies of Ethiopia were evaluated under moisture stress and non-stress conditions (35% and 70% available soil... -
Estimation of water use by red grass (Themeda triandra Forssk.) growing in shallow soils: toward a method of on-farm drought assessment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Venter --- , South AfricaThis study was prompted by the need of stock farmers without access to computers for a simple on-farm drought assessment method as an aid in management decision making with respect to stock numbers in times of drought. It is proposed... -
An overview of Karoo vegetation modelling Published on the occasion of the Centenary of the ARC-Institute for Soil, Climate and Water
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.C. Venter --- Department of Soil, South AfricaKaroo vegetation processes have been modelled in recent years at various scales and levels of complexity for a variety of purposes ranging from regional drought assessment to range management at farm level. Some models aim to simulate veld growth responses... -
Differences in the level of D-glucose and sucrose among durum wheat (Triticum turgidum var durum L.) genotypes differing in their responses to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South AfricaThe effect of drought stress on the content of water soluble carbohydrate (sucrose and D-glucose) was investigated in durum wheat (Triticum turgidum var durum L.) above ground organs to assess and characterise the responses of genotypes with differing responses to... -
Morpho-physiological response of durum wheat genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South AfricaThe impact of moisture stress on phenology and growth varies for genotypes and the growth stages at which stress is encountered. The aim of this study was to determine the effect of moisture stress on some morpho-physiological traits of durum... -
Underutilised indigenous and traditional crops: why is research on water use important for South Africa?
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.R. Backeberg --- , A.J. Sanewe Water --- ,The answer to the question ‘why is research on water use important for South Africa?’ is quite straightforward: more research is needed because there is a major gap in knowledge on water use of indigenous crops. These indigenous edible plants... -
A preliminary study to determine water stress tolerance in wild melon (Citrullus Lanatus L.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.S. Zulu --- , A.T. Modi --- ,Common wild melon (Citrullus Lanatus L.) is an indigenous crop that can contribute to the alleviation of food insecurity as it is an easy-to-grow food source with the potential for processing. The objective of this study was to test the... -
Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO2–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: E Heyneke --- School of Environmental Science and Development, South Africa AJ Strauss --- School of Environmental Science and Development, South Africa RJ Strasser --- Bioenergetics Laboratory, Switzerland GHJ Krüger --- School of Environmental Science and Development, South AfricaSouth Africa has an extremely energy-intensive economy, resulting in substantial air pollution through its coal-fired power stations. Modelled sulphur dioxide (SO2) concentrations on the central Highveld mostly range between 10 and 50 ppb, exceeding 50 ppb in source areas. Well-watered... -
Growth, phenological and yield responses of a bambara groundnut (Vigna subterranea (L.) Verdc.) landrace to imposed water stress under field conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa AlbertT Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaBambara groundnut (Vigna subterranea (L.) Verdc.) is an underutilised species with potential to contribute nutritional and food security in marginal areas. Growth, phenology and yield of a local bambara groundnut landrace from Jozini, KwaZulu-Natal, characterised into three selections according to... -
NEW DISTRIBUTION RECORDS FOR CLARIAS THEODORAE WEBER 1897, BARBUS EUTAENIA BOULENGER 1904, BARBUS POLYLEPIS BOULENGER 1907 AND OPSARIDIUM ZAMBEZENSE (PETERS 1852) FROM THE WATERBERG, TRANSVAAL, SOUTH AFRICA.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: C.J. Kleynhans --- , South Africa A. Hoffman --- , South AfricaNew distribution records for four fish species in the Waterberg mountains of the Transvaal were established during surveys since 1987–92. Clarias theodorae was previously reported from one locality each in the Waterberg and Soutpansberg. The current survey disclosed its presence... -
Dry matter yield of herbaceous rangeland plants and livemass gain of Tswana steers in eastern Botswana in response to stocking rate and phosphorus supplementation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G. Tacheba --- Department of Agricultural Research, Botswana W.N. Mphinyane --- Department of Agricultural Research, BotswanaTswana steers were continuously grazed at stocking rates of 3, 6, and 9 ha LSU‐1 in two blocks, and steers in one block were supplemented with phosphorus. Dry matter yield of herbaceous rangeland plants was measured at the end of... -
The effect of defoliation during wilting on the production of Themeda triandra and Eragrostis lehmanniana in semi‐arid grassland
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: H.A. Snyman --- Department of Pasture Science, Republic of South AfricaThe effect of defoliation during wilting on the production of Themeda triandra and Eragrostis lehmanniana was studied over four years (1977 to 1980). Defoliation whilst the plants were at temporary wilting point in the early growing season (before 1 January)... -
The application of state‐and‐transition models to rangeland research and management in arid succulent and semi‐arid grassy Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South Africa M.T. Hoffman --- Stress Ecology Research Programme, Republic of South AfricaWe evaluate the ability of existing models of vegetation dynamics to explain how drought and herbivory by domestic livestock can change Karoo vegetation, and why the vegetation does not always return to its original composition when livestock are withdrawn. Using... -
Climate change perceptions, drought responses and views on carbon farming amongst commercial livestock and game farmers in the semiarid Great Fish River Valley, Eastern Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CL Clarke --- Department of Environmental Science, South Africa SE Shackleton --- Department of Environmental Science, South Africa M Powell --- Department of Environmental Science, South AfricaThere is increasing evidence that climate change will be one of the primary challenges facing future development and agriculture. Farmers, whether crop or livestock farmers, will be faced with tradeoffs and constraints as climate change exposes them to greater risk... -
Comparative investigation of physiological responses of field-grown alfalfa and tall fescue to cutting under different water regimes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Lazaridou --- Department of Forestry, Greece P Kostopoulou --- School of Forestry and Natural Environment, Greece M Karatassiou --- School of Forestry and Natural Environment, Greece G Merkouropoulos --- Centre for Research and Technology Hellas, GreeceAn important consideration in designing and managing forage systems is the knowledge of the physiological response mechanisms to cutting, especially when water deficit conditions are prevailing. The objective of this study was to determine the physiological response of Medicago sativa... -
Zooplankton community changes in Nhlabane estuary, South Africa, induced by man-made structures and drought
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL JerlingThe Nhlabane estuary and coastal lake system has suffered a number of man-made impacts since 1977, when the lake and estuary were separated by the construction of a barrage. More recent man-made events included the construction of temporary sand walls,... -
Status of the estuarine fish fauna in the St Lucia Estuarine System, South Africa, after 30 months of mouth closure
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Digby Cyrus Leon VivierThe Lake St Lucia Estuarine System, South Africa, has been under pressure due to recent drought conditions, which led to extreme low lake levels, hypersaline conditions and closure of the mouth. The estuary mouth closed in June 2002 and has... -
Fish breeding in, and juvenile recruitment to, the St Lucia Estuarine System under conditions of extended mouth closure and low lake levels
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Digby Cyrus Leon VivierOngoing drought conditions along the northern coast of KwaZulu-Natal resulted in the St Lucia Estuary mouth closing, and to evaporation leading to extremely low lake levels and the development of hypersaline conditions in most parts of the system. The mouth... -
Initial characterisation of the mesozooplankton community of the Mfolozi– Msunduzi estuarine system, KwaZulu-Natal, South Africa, during a low-flow period
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe mesozooplankton of the Mfolozi and Msunduzi estuaries, which share a combined mouth, was sampled twice per year during a two-year period of relatively low river flow. Samples were collected during March, after the rainy season when the estuary mouth... -
The potential for zoobenthic fauna dispersal into the St Lucia Estuary from the Mfolozi–Msunduzi estuarine system, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe onset of a prolonged drought in the St Lucia catchment in 2002 and subsequent mouth closure raised concern for the biota of the estuary. Ezemvelo KZN Wildlife proposed a scheme whereby the Mfolozi–Msunduzi mouth would be closed, causing fresh... -
Ecological status and role of the Mfolozi–Msunduzi estuarine system within the iSimangaliso Wetland Park, a World Heritage Site on the south-east coast of South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South Africa L Vivier --- Coastal Research Unit of Zululand, Department of Zoology, South Africa RK Owen --- Coastal Research Unit of Zululand, Department of Zoology, South Africa HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe original structure and functioning of the historical Mfolozi–St Lucia estuarine system are described and anthropogenic impacts, which resulted in the Mfolozi and Msunduzi rivers being separated from the St Lucia Estuary and having their own combined mouth to the... -
Impact of tropical storms and drought on the dinoflagellates Karlodinium micrum and Prorocentrum minimum in estuarine rivers of North Carolina, USA
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EE FensinThe dinoflagellates Karlodinium micrum and Prorocentrum minimum are harmful algal bloom taxa from different parts of the world. They are routinely documented in estuarine rivers in North Carolina, but there have been no known toxic outbreaks of these taxa in... -
Physiological responses of Eucalyptus nitens × nitens under experimentally imposed water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MEO Mokotedi --- School of Biological and Conservation Sciences, Biological Sciences Building, South Ring Road, Westville Campus, South AfricaThis study reports on how a cold- and frost-tolerant clone of Eucalyptus nitens × nitens responds to drought stress. The aim was to identify physiological traits that contribute to drought acclimation. Macropropagated saplings were grown in a climate-controlled greenhouse in... -
Die-back of kiaat (Pterocarpus angolensis) in southern Africa: a cause for concern?
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JWM Mehl --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, South Africa J Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South Africa MJ Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South AfricaPterocarpus angolensis (kiaat) is a well-known southern African tree species of commercial importance that occurs in several vegetation types in the Zambezian regional centre of endemism. The most prominent of these vegetation types are the Zambezian miombo woodland and undifferentiated... -
Stomatal characteristics of Eucalyptus grandis clonal hybrids in response to water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: AlanaB Eksteen --- School of Life Sciences, South Africa Valerie Grzeskowiak --- Sappi Forests, South Africa NickyB Jones --- Sappi Forests, South Africa NormanW Pammenter --- School of Life Sciences, South AfricaThis study describes the stomatal response occurring during water stress and subsequent recovery of three Eucalyptus grandis clonal hybrids. The aim was to investigate the degree to which stomatal conductance (g s) and stomatal density differ between the clonal hybrids... -
Growth response at age 10 years of five Eucalyptus genotypes planted at three densities on a drought-prone site in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jacob Crous --- Sappi Forests, South Africa Louisa Burger --- Department of Forest and Wood Science, South Africa Giovanni Sale --- Sappi Forests, South AfricaSouth Africa's climate is characterised by the occurrence of regular droughts. An assessment of drought mortality in KwaZulu-Natal during 1999 could not provide accurate information regarding the effect of species or planting density on mortality because of confounding species-site allocations... -
The response of the diatom flora of St Lucia Lake and estuary, South Africa, to a severe drought
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GC Bate PA SmailesLake St. Lucia, South Africa's largest estuarine system, was isolated from the sea by a beach berm throughout a severe drought from 2002 to 2007, with the lake water level being extremely low over much of its total area. A... -
Analysis of differences in field performance of vegetatively and seed-propagated Eucalyptus varieties I: survival and leaf gas exchange
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MEO Mokotedi --- School of Biological and Conservation Sciences, Biological Sciences Building, South Ring Road, Westville Campus, South Africa MP Watt --- School of Biological and Conservation Sciences, Biological Sciences Building, South Ring Road, Westville Campus, South Africa NW Pammenter --- School of Biological and Conservation Sciences, Biological Sciences Building, South Ring Road, Westville Campus, South AfricaThe aim of this study was to compare survival rates and leaf gas exchange of micro- and macro-propagated Eucalyptus grandis × E. nitens, and seed-propagated E. grandis and E. nitens, at a site in Hilton, KwaZulu-Natal, South Africa, where the... -
Optimising drought adaptation by small-scale farmers in southern Africa through integration of indigenous and technologically-driven practices
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Rudzani A. Makhado --- Unit Manager, Research & Evaluation Section, South Africa Amani T. Saidi --- Stakeholder Manager, South African Environmental Observation Network, South Africa Phumudzo P. Tshikhudo --- Scientist, Plant Health Directorate, Department of Agriculture, South AfricaThis paper reviews and synthesises research-based literature on drought adaptation practices among small-scale farmers in southern Africa. The paper reviews the existing literature in order to identify ways in which small-scale poor farmers in southern Africa adapt to the effects... -
An innovative drought early warning system for sub-Saharan Africa: integrating modern and indigenous approaches
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Muthoni Masinde --- Department of Information Technology, South AfricaDroughts remain the number one disaster in Africa; drought is responsible for over 88% of all the types of disasters that people are affected by. An effective drought early warning system can support appropriate mitigation and preparedness strategies and hence... -
The impact of fish and drought on frog breeding in temporary waters in Zimbabwe
Item type: Journal Article • Journal: African Zoology • Authors: T. Muteveri --- Department of Biological Sciences, Zimbabwe B. E. Marshall --- Department of Biological Sciences, ZimbabweThe breeding of frogs in four ponds near Harare, Zimbabwe, was investigated during a wet rainy season (2000/01) and a dry one (2001/02). During 2000/01 eight and nine species bred in two ponds in abandoned gravel pits that never contained... -
Southern African pasture and forage science entering the 21st century: past to present
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Wayne F Truter --- Department of Plant Production and Soil Science, South Africa Philip R Botha --- Directorate Plant Sciences, Western Cape Department of Agriculture, South Africa Chris S Dannhauser --- Grass SA, Waverley, South Africa Barbara V Maasdorp --- Department of Crop Science, Zimbabwe Neil Miles --- South African Sugarcane Research Institute, South Africa Albert Smith --- Stats4science, South Africa Hennie A Snyman --- Department of Animal, Wildlife and Grassland Sciences, South Africa Neil M Tainton --- Amber Valley, South AfricaGiven the global challenges of mitigating and alleviating land degradation and ensuring food security, particularly through protein production, pasture and forage science together with rangeland science will remain imperative to sustainable livestock production systems. Recognising the scientific principles developed in... -
Identifying high-yielding dryland wheat cultivars for the summer rainfall area of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ernest Dube --- Agricultural Research Council–Small Grain Institute, South Africa Rorisang Mare-Patose --- Agricultural Research Council–Small Grain Institute, South Africa Willem Kilian --- Agricultural Research Council–Small Grain Institute, South Africa Annelie Barnard --- Agricultural Research Council–Small Grain Institute, South Africa Toi J Tsilo --- Agricultural Research Council–Small Grain Institute, South AfricaDrought is a major challenge to dryland wheat (Triticum aestivum L.) production in the summer rainfall area (SRA) of South Africa. Dryland wheat farming in the SRA is unique in that the crop is dry-planted on high-water-table soils in winter,... -
Mesozooplankton community structure changes in the Mfolozi–Msunduzi estuarine system, South Africa, during contrasting river flow conditions
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HL Jerling --- Coastal Research Unit of Zululand, Department of Zoology, South Africa DP Cyrus --- Coastal Research Unit of Zululand, Department of Zoology, South AfricaThe Mfolozi–Msunduzi estuarine system is subject to periodic dry and wet cycles, with subsequent changes in the abiotic and biotic characteristics of the system. The aim of the current study was to compare its mesozooplankton composition during relatively dry and... -
The role of proline and root traits on selection for drought-stress tolerance in soybeans: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Obed J Mwenye --- Department of Plant Sciences, South Africa Leon van Rensburg --- Department of Soil, Crop and Climate Sciences, South Africa Angeline van Biljon --- Department of Plant Sciences, South Africa Rouxléne van der Merwe --- Department of Plant Sciences, South AfricaDrought stress is a major limiting factor in soybean production. It reduces both the yield and its components. This is dependent on the level and occurrence of drought stress with respect to the growth stages of the plants. Breeding for... -
Securing African forests for future drier climates: applying ecophysiology in tree improvement
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Casparus J Crous --- Department of Plant and Soil Sciences, South Africa Francois S Malan --- 102, 2nd Avenue, South Africa Michael J Wingfield --- Department of Plant and Soil Sciences, South AfricaIncreasing incidences of drought-induced tree mortality are being recorded worldwide, including Africa. African forests cover a significant proportion of the continent, which implies that African forest sustainability is threatened from a climate-change perspective. This is especially problematic in a developing... -
Use of hydrogels in the planting of industrial wood plantations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jacob W Crous --- Sappi Forests, South AfricaThe quantity of available water in soil is crucial for plant growth, especially after transplanting as this water will enable the growth of new roots to facilitate nutrient and water uptake. Water absorbed by a hydrogel (superabsorbent polymer) has the... -
Eucalypt plantation management in regions with water stress
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: José LM Gonçalves --- Department of Forest Science, Brazil Clayton A Alvares --- Institute of Forest Research and Study, Brazil José HT Rocha --- Department of Forest Science, Brazil Carolina B Brandani --- Department of Forest Science, Brazil Rodrigo Hakamada --- Department of Forest Science, BrazilMost eucalypt plantations are managed in short rotations (6–8 years) and are established in regions with water and nutritional stresses of varying degrees. The mean annual increment in these regions ranges from 20 to 45 m3 ha−1 y−1 depending on... -
Influences of the arbuscular mycorrhizal fungus Glomus mosseae on morphophysiological traits and biochemical compounds of common bean (Phaseolus vulgaris) under drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Ali Ganjeali --- Department of Biology, Faculty of Sciences, Iran Elham Ashiani --- Department of Biology, Faculty of Sciences, Iran Maryam Zare --- Department of Biology, Faculty of Sciences, Iran Elahe Tabasi --- Department of Biology, Faculty of Sciences, IranThe symbiosis of arbuscular mycorrhizae (AM) with plant roots can enhance plant responses, especially to drought stress. An experiment was conducted in a growth chamber to examine the impacts of arbuscular mycorrhizae on improving the drought tolerance of common bean... -
Alternative eucalypts for commercial pulpwood production at moderately dry sites in the warm temperate zone of KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Robin AW Gardner --- Institute for Commercial Forestry Research, South Africa Keith M Little --- School of Natural Resource Management, Nelson Mandela Metropolitan University, South Africa Arnulf Kanzler --- Sappi Forest Research, South Africa Thimagren N Naidoo --- Sappi Forest Research, South AfricaDuring 2001, a series of four site–taxa interaction trials was established in the warm temperate (mean annual temperature range 16–19 °C) forestry climatic zone of KwaZulu-Natal (KZN), South Africa. The main objective was to investigate the commercial forestry potential of... -
Performance of Drought Tolerant Maize Varieties under Water Harvesting Technologies in the Coastal Region of Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: M.B. Muli --- Kenya Agricultural and Livestock Research Organization, Kenya D. Kengo --- Kenya Agricultural and Livestock Research Organization, Kenya A. Mzingirwa --- Kenya Agricultural and Livestock Research Organization, Kenya R. Musila --- Kenya Agricultural and Livestock Research Organization, KenyaThe average annual rainfall in coastal Kenya is 450–700 mm per annum in most places while the total annual evapotranspiration is 1200–1800 mm. In arid and semi-arid lands (ASALs), farmers grow maize varieties for medium to high rainfall zones without considering the... -
Sustaining African water resources under climate change: Emerging adaptation measures from UNFCCC national communications
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shepherd Muchuru --- Institute for Corporate Citizenship, University of South Africa, South Africa Godwell Nhamo --- Institute for Corporate Citizenship, University of South Africa, South AfricaThe changing climate is expected to affect the demand for and availability of water resources. The African continent is known to be water scarce with highly temporal and spatially variable rainfall. This paper explores climate-induced challenges faced in the water... -
Performance and participatory evaluation of green gram genotypes in the semi-arid environments of Eastern Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: R Karimi --- Crop Improvement, Kenya RM Nair --- Legume Breeding, India D Ledesma --- Biometric, Taiwan DL Mutisya --- Crop Improvement, Kenya L Muthoni --- Socio-Economics, KenyaGreen gram (Vigna radiata (L.) R Wilczek var. radiata) is an important pulse in the climatically marginal areas of Eastern Kenya. The pulse is cultivated primarily for food grain and income generation. Its productivity in Eastern Kenya has declined, because... -
Genotype-by-environment interaction of grain yield among candidate dryland wheat genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Miriam Matlala --- African Centre for Crop Improvement, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Jacob Mashilo --- African Centre for Crop Improvement, South AfricaGenotype-by-environment interaction (GEI) analysis is an essential step to identify superior and stable yielding genotypes and suitable test environments for cultivar development. The objective of the present study was to examine GEI of grain yield among candidate dryland wheat genotypes... -
Correlation and path coefficient analyses of yield and yield components in drought-tolerant bread wheat populations
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kwame W Shamuyarira --- African Centre for Crop Improvement, South Africa Hussein A Shimelis --- African Centre for Crop Improvement, South Africa Isack Mathew --- African Centre for Crop Improvement, South Africa Toi J Tsilo --- Agricultural Research Council–Small Grains, South AfricaCorrelation and path coefficient analyses of economic traits is important in identifying traits that can be used to simplify selection of complex traits such as grain yield. The aim of this study was to determine the degree of association between... -
Megaherbivore response to droughts under different management regimes: lessons from a large African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa Mike JS Peel --- , South Africa Sam M Ferreira --- , South Africa Cathy Greaver --- , South Africa Danie J Pienaar --- , South AfricaDroughts are predicted to increase in frequency and intensity for large parts of Africa. It is unclear how this may impact native grazers in protected areas, and how these outcomes may differ under contrasting management approaches. Reducing artificial water sources... -
Drought challenges for nature tourism in the Sabi Sands Game Reserve in the eastern region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Tamzyn Smith --- , South Africa Jennifer M Fitchett --- , South AfricaThe Lowveld of South Africa, a savanna biome region economically dominated by nature tourism, has experienced a prolonged dry period beginning in approximately 2015. Despite emerging literature on climate and tourism in southern Africa, the challenges to tourism in the... -
Recent droughts in the Kruger National Park as reflected in the extreme climate index
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johan Malherbe --- , South Africa Izak PJ Smit --- , South Africa Konrad J Wessels --- , United States Philip J Beukes --- , South AfricaAssociated with the 2015/2016 El Niño, extreme drought occurred over the Lowveld of South Africa. The area includes the Kruger National Park (KNP). Significant die-offs of a mega herbivore species occurred, corroborated by census data in KNP. The drought situation... -
Observations on the natural history of a savanna drought
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Izak PJ Smit --- , South Africa William J Bond --- , South AfricaDrought studies are often opportunistic and post hoc, where a drought fortuitously occurs during a research project that was not specifically designed to study the drought, but where researchers capitalised on the opportunity. These studies often lack focus on formulating... -
Effects of prolonged mouth closure in a temporarily open/closed estuary: a summary of the responses of invertebrate communities in the uMdloti Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: UM Scharler --- School of Life Sciences, South Africa K Lechman --- School of Life Sciences, South Africa T Radebe --- School of Life Sciences, South Africa HL Jerling --- Department of Zoology, South AfricaProlonged mouth closure in estuaries is often associated with hypersalinity, mainly as a result of reduced freshwater inflow. However, on the KwaZulu-Natal coast, South Africa, temporarily open/closed estuaries have a tendency towards hyposalinity during closed mouth conditions, primarily because of... -
Vulnerability, institutional arrangements and the adaptation choices made by farmers in the Western Cape province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sanne Raaijmakers --- Fagelstraat 75-HS, the Netherlands Pieter A Swanepoel --- Department of Agronomy, South AfricaFrom 2015 to 2018, South Africa suffered from the worst drought since 1904. Climate change is predicted to increase both the frequency and intensity of droughts in parts of South Africa. In this light it is evident that agricultural systems... -
Multiscale drivers of hippopotamus distribution in the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Alexa S Prinsloo --- , South Africa Deena Pillay --- , South Africa M Justin O'Riain --- , South AfricaThis study provides preliminary data on predictors of Hippopotamus amphibius (Linnaeus, 1758; hippo) distribution in St Lucia Estuary, the largest estuarine system in Africa and a key habitat for one of South Africa’s largest hippo populations. We use binary logistic... -
Long-term influence of season of grazing and rainfall on vegetation in the eastern Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Justin CO du Toit --- , South Africa Timothy G O’Connor --- , South AfricaIn the Nama-Karoo, South Africa, rainfall and grazing by livestock are two important drivers of botanical composition. Summer rains are advantageous particularly to the grass layer, whereas the characteristic dwarf shrubs survive better than grasses during drought, and benefit from... -
Genetic differentiation of selected drought and heat tolerant wheat genotypes using simple sequence repeat markers and agronomic traits
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sonto Silindile Mkhabela --- , South Africa Hussein Shimelis --- , South Africa Jacob Mashilo --- , South AfricaDevelopment of wheat (Triticum aestivum L.) varieties with increased yield potentials that are adapted to drought and heat stresses requires genetically differentiated and complementary parents. The present study established genetic profiles of heat and drought tolerant wheat genotypes through SSR... -
Inter-annual growth response of three Miombo tree species to climatic effects
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Francis Munalula --- , South Africa Thomas Seifert --- , South Africa Martina Meincken --- , South AfricaMiombo woodlands cover a large part of Southern Africa and contribute an important wood source for the local wood industry. The already observed and further predicted changes in climatic patterns can be expected to affect the wood properties of Miombo... -
Modelling continental range shift of the African elephant (Loxodonta africana) under a changing climate and land cover: implications for future conservation of the species
Item type: Journal Article • Journal: African Zoology • Authors: Sintayehu W Dejene --- , Ethiopia Kudzai S Mpakairi --- , Rajapandian Kanagaraj --- , Germany Yussuf A Wato --- , Kenya Sewnet Mengistu --- , EthiopiaClimate and land use change are anticipated to alter the distribution of wildlife, due to their impact on the quantity and quality of forage availability, water cycle, as well as competition for key resources. Using an ensemble of species distribution... -
Combining ability of bread wheat genotypes for yield and yield-related traits under drought-stressed and non-stressed conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yared Semahegn --- , South Africa Hussein Shimelis --- , South Africa Mark Laing --- , South Africa Isack Mathew --- , South AfricaDrought is a major cause of reduced yields in dryland wheat production. This study aimed to determine the combining ability effects of selected bread wheat genotypes (Triticum aestivum L.) for yield and yield-related traits. Eight parental lines were selected and... -
Investigating the wood production and adaptability potential of Corymbia hybrid progeny in northern coastal Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Robin AW Gardner --- , South Africa David J Lee --- , AustraliaDuring August 2013, two ‘new’ eucalypt taxa × site interaction trials were established in northern coastal Zululand. The main purpose of these trials was to investigate the commercial forestry potential of a range of Corymbia inter-specific hybrids for the region... -
Contrasting effects of soil pH on seed germination and early seedling growth of Calobota sericea and Lessertia frutescens subs. frutescens
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Francuois L Müller --- ,This study evaluated the impacts of pH on the germination and early seedling growth of Calobota sericea and Lessertia frutescens subsp. frutescens, two perennial legume species found in the semi-arid rangelands of South Africa. The results of this study revealed... -
Smallholder farmers’ adaptation strategies to mitigate the effect of drought on maize production in OR Tambo District municipality
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Brian Muroyiwa --- , Lesotho Nasiphi Masinda --- , South Africa Abyssinia Mushunje --- , South AfricaThere is evidence that climate variability has affected agriculture and the expectation is that the situation will get worse over time. This study examined smallholder farmers’ adaptation strategies to mitigate the effects of drought on maize production in OR Tambo... -
Impact of climate and management on radial growth dynamics of two coexisting Mediterranean Quercus species in south Albania
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Edmond Pasho --- , Albania Arben Q Alla --- , AlbaniaIn the context of changing climate conditions, it is crucial to understand how trees maintain resistance and resilience to and recover from drought stress and management-related disturbances, and how management (intensive/extensive) modulates tree growth responses to climate. Dendrochronological methods were... -
Use of remotely sensed derived metrics to assess wetland vegetation responses to climate variability-induced drought at the Soetendalsvlei wetland system in the Heuningnes Catchment, Western Cape province, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: NC Ndlala --- , South Africa T Dube --- , South AfricaWetland vegetation plays an important role in the environmental functioning of wetlands through the provision of ecosystem services, such as food and critical habitat for organisms that live in or near water resources. The ecosystem services provided by wetland vegetation... -
Perceived impact of climate variability and change on livelihoods of smallholder farmers in Lesotho
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Christopher Dick-Sagoe --- University of Botswana, Botswana Kwame Nkrumah Hope --- Akenten Appiah-Menka University of Skills Training and Entrepreneurial Development, Peter Asare-Nuamah --- University of Environment and Sustainable Development, GhanaLesotho is a poor country that heavily depends on rain-fed agriculture for socioeconomic growth and development. However, climate change threatens the agriculture sector, which has implications on the ability of the country to harness its development, especially among smallholder farmers,... -
Morphological and physiological responses of Calobota sericea plants subjected to water limitation and subsequent rewatering
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Lincoln Raitt --- University of the Western Cape, South Africa Lilburne Cyster --- University of the Western Cape, South Africa Samson Chimphango --- University of Cape Town, South Africa M Igshaan Samuels --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa Clement Cupido --- Agricultural Research Council – Animal Production: Range and Forage Sciences, South Africa J Stephen Boatwright --- University of the Western Cape, South AfricaCalobota sericea is a native legume of South Africa, confined to the water-limited rangelands, and it has recently been prioritised for additional characterisation regarding its pasture potential. In this study, we examined the growth characteristics of C. sericea under glasshouse... -
Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: SJ Milton --- , South Africa H Petersen --- , South Africa G Nampa --- , South Africa H van der Merwe --- , South Africa JR Henschel --- , South AfricaWe document changes in rangeland during a prolonged drought in the arid Karoo. Rangeland in this arid region is species-rich and dominated by a mixture of long-lived succulent and non-succulent shrubs. Ranching has led to the domination of vegetation by... -
Herbicide trials on Campuloclinium macrocephalum (Asteraceae) during adverse conditions reveal incompatibility with biocontrol and a narrow window of opportunity for chemical control
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JM Goodall --- University of the Witwatersrand, South Africa ETF Witkowski --- University of the Witwatersrand, South AfricaHerbicide trials on pompom weed Campuloclinium macrocephalum (Less.) DC. (Asteraceae) were carried out in grasslands with xeric and hydric soils, at sites in Gauteng, South Africa, from 2005 to 2008. The rust fungus Puccinia eupatorii Dietel, an established self-perpetuating biocontrol... -
Seedling establishment and early growth in Calobota sericea subjected to moisture stress
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- , South Africa Letty Masemola --- , South Africa Stephen Modiba --- , South Africa Nothando Ngcobo --- , South AfricaThe South African perennial legume Calobota sericea (Thunb.) Boatwr. & B-E van Wyk has been shown to be drought tolerant as mature plants, but information on drought tolerance of seedlings is lacking. This study evaluated the impact of moisture stress... -
Drought release and post-drought changes in herbaceous composition and diversity in two land uses subjected to selective bush control in a semi-arid Kalahari savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N van Staden --- North-West University, South Africa A Marquart --- North-West University, South Africa K Kellner --- North-West University, South AfricaLand degradation due to bush encroachment and drought threatens the well-being of land users and forage production in the semi-arid savannas of southern Africa. This study aimed to analyse how herbaceous vegetation in the Kalahari savanna can recover from drought,... -
Phenotypic variation and association of agronomic traits in tepary bean genotypes under drought-stress and non-stress conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Saul Eric Mwale --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Hussein Shimelis --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Wilson Nkhata --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South Africa Abel Sefasi --- Lilongwe University of Agriculture and Natural Resources, Malawi Isaac Fandika --- Kasinthula Agricultural Research Station, Malawi Jacob Mashilo --- School of Agricultural, Earth and Environmental Sciences, African Centre for Crop Improvement (ACCI), University of KwaZulu-Natal, South AfricaGenetic variation for economic traits associated with drought adaptation is a prerequisite for developing climate-smart crop varieties, including tepary bean (Phaseolus acutifolius A. Gray). This study aimed to assess the magnitude of genetic variation and the relationship of agronomic traits... -
Paclobutrazol application in eucalypt clones promotes morphological changes without affecting the physiological characteristics
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jenifer Nathanna Marcelino Moura --- Universidade Federal do Acre, Brazil Paulo André Trazzi --- Universidade Federal do Acre, Brazil Elsilene Thaynara Melo Sales --- Universidade Federal do Acre, Brazil Marcio Oliveira Martins --- Universidade Federal do Acre, Brazil Keveny da Silva e Silva --- Universidade Federal do Acre, Brazil Gabriel Melo Mustafa --- Universidade Federal do Acre, Brazil Barbara Valentim Oliveira --- Universidade Federal do Acre, BrazilThe aim of this study was to investigate the morphophysiology of young eucalypt clones in response to different water regimes and paclobutrazol (PBZ) concentrations applied to the soil. The experiment was conducted in a greenhouse environment at the Federal University... -
Physiological traits associated with drought tolerance in Moroccan chickpea
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Meriem Tabouktirt --- University Hassan II, Morocco Fatoumata Farida Traore --- University Hassan II, Morocco Sara Fahde --- , Morocco Ayyoub Ammar --- University Hassan II, Morocco Hasnae Choukri --- , Morocco Said Boughribil --- University Hassan II, MoroccoIn a greenhouse experiment conducted in Mohammedia, drought stress responses were evaluated under two treatments (100% and 50% of field capacity; FC) in six Moroccan chickpea varieties: Arifi, Bouchra, Farihane, Moubarak, Rizki, and Zahour. The susceptibility index (SI) clearly differentiated...