Articles by Keyword: Chlorophyll Fluorescence

Search results for Chlorophyll Fluorescence

We found 56 results for you
  1. Use of chlorophyll <em>a</em> fluorescence in screening for herbicide susceptibility in several <em>Nicotiana tabacum</em> L. cultivars and breeding lines

    Use of chlorophyll <em>a</em> fluorescence in screening for herbicide susceptibility in several <em>Nicotiana tabacum</em> L. cultivars and breeding lines

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Possible differential sensitivity of newly released tobacco cultivars to different herbicides must be determined, as possible unfavourable combinations could exist which may have large financial implications in terms of cultivars bred, herbicide and tobacco line combinations used, and concentrations in...
  2. Measuring water stress in <em>Pinus patula</em> Schiede ex Schlect. &amp; Cham. seedlings

    Measuring water stress in <em>Pinus patula</em> Schiede ex Schlect. &amp; Cham. seedlings

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A pot trial was conducted to investigate measures of water stress for Pinus patula seedlings planted for commercial forestry in South Africa. The objectives were to determine the efficacy of different equipment for quantifying water stress, and the effect of...
  3. Preliminary assessment of bambara groundnut (<em>Vigna subterranea</em> L.) landraces for temperature and water stress tolerance under field conditions in Botswana

    Preliminary assessment of bambara groundnut (<em>Vigna subterranea</em> L.) landraces for temperature and water stress tolerance under field conditions in Botswana

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Field experiments were conducted in 2006/07 and 2007/08 in Botswana to study the response of bambara groundnut to heat stress (2006/07 season) and to heat stress and soil moisture deficit stress (2007/08 season). In both seasons selected bambara groundnut landraces...
  4. Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO<sub>2</sub>–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean

    Open-top chamber facility to study air pollution impacts in South Africa. Part II: SO<sub>2</sub>–drought interactions on yield, photosynthesis and symbiotic nitrogen fixation in soybean

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    South 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...
  5. The effect of canola (<em>Brassica napus</em>) as a biofumigant on soil microbial communities and plant vitality: a pot study

    The effect of canola (<em>Brassica napus</em>) as a biofumigant on soil microbial communities and plant vitality: a pot study

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Canola (Brassica napus) may be incorporated into soil as a biofumigant for control of pathogens such as Sclerotinia sclerotiorum. Yet, the effect of biofumigants on natural microbial communities required to maintain soil functions is still unclear. A pot experiment with...
  6. Ecophysiological responses of the salt marsh grass <em>Spartina maritima</em> to salinity

    Ecophysiological responses of the salt marsh grass <em>Spartina maritima</em> to salinity

    Item type: Journal Article • Journal: African Journal of Aquatic Science
    The effects of salinity on growth and productivity of Spartina maritima (Curtis) Fernald were investigated in glasshouse and field experiments in 2008. In the glasshouse study, plants were subjected to 2%, 10%, 20%, 40% and 80% sea water, with tidal...
  7. Using chlorophyll fluorescence to determine stress in <em>Eucalyptus grandis</em> seedlings

    Using chlorophyll fluorescence to determine stress in <em>Eucalyptus grandis</em> seedlings

    Item type: Journal Article • Journal: The Southern African Forestry Journal
    Since several environmental factors affect the functioning of the photosynthetic system, the status of the photosynthetic apparatus is a good indicator of the plant in terms of stress and stress adaptation. The measurement of chlorophyll fluorescence with a portable fluorimeter...
  8. Growth, physiology and yield responses of <em>Amaranthus cruentus</em>, <em>Corchorus olitorius</em> and <em>Vigna unguiculata</em> to plant density under drip-irrigated commercial production

    Growth, physiology and yield responses of <em>Amaranthus cruentus</em>, <em>Corchorus olitorius</em> and <em>Vigna unguiculata</em> to plant density under drip-irrigated commercial production

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata are traditional leafy vegetables with potential to improve nutritional security of vulnerable people. The promotion of these crops is partly hindered by the lack of agronomic information. The effect of plant spacing on...
  9. Effects of short-term water deficit stress on physiological characteristics of Bambara groundnut (<em>Vigna subterranea</em> (L.) Verdc.)

    Effects of short-term water deficit stress on physiological characteristics of Bambara groundnut (<em>Vigna subterranea</em> (L.) Verdc.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Bambara groundnut (Vigna subterranea (L.) Verdc.) is an annual leguminous food crop native to Africa. The crop is grown in marginal soils and it is considered to be a drought-resistant species. However, there is limited information on the ways Bambara...
  10. Contrasting hydrography and phytoplankton distribution in the upper layers of cyclonic eddies in the Mozambique Basin and Mozambique Channel

    Contrasting hydrography and phytoplankton distribution in the upper layers of cyclonic eddies in the Mozambique Basin and Mozambique Channel

    Item type: Journal Article • Journal: African Journal of Marine Science
    Hydrographic data collected in cyclonic eddies in the Mozambique Channel and Basin revealed notable differences in temperature and salinity at a depth of 100 m, the upper mixed layer, the nitracline depths, and vertical distribution of chlorophyll-a (Chl-a). Differences in...