Articles by Keyword: Heat Tolerance

Search results for Heat Tolerance

We found 85 results for you
  1. Effect of temperature on cone bursting, seed extraction and germination in five provenances of <em>Pinus roxburghii</em> from Garhwal Himalaya in India

    Effect of temperature on cone bursting, seed extraction and germination in five provenances of <em>Pinus roxburghii</em> from Garhwal Himalaya in India

    Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science
    Pinus roxburghii (chir pine or long-needle pine) is considered to be a fire-hardy species. In this study the effect of a wide range of elevated temperatures (from 40 °C to 150 °C) on cone bursting and subsequent seed germination was...
  2. Response of five soybean (<em>Glycine max</em> (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil

    Response of five soybean (<em>Glycine max</em> (L.) Merr.) cultivars to lime and phosphorus on an acid Normandien subsoil

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Five soybean cultivars (Hill, Geduld, Forrest, Welkom and Oribi), previously selected for Al tolerance or sensitivity by a rapid seedling evaluation method, were grown in acid soil treated with varying rates of lime and P. After 35 days the plants...
  3. Assessment of aluminium tolerance in maize using a rapid screening procedure

    Assessment of aluminium tolerance in maize using a rapid screening procedure

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Routine testing for Al tolerance requires that screening procedures be both rapid and simple. Growth-chamber techniques, developed in the USA, show considerable promise in this regard and were used in this study to compare the Al tolerance of 10 maize...
  4. Genotypic tolerance of selected dry bean (<em>Phaseolus vulgaris</em> L.) cultivar s to soluble Al and to acid, low P soil conditions

    Genotypic tolerance of selected dry bean (<em>Phaseolus vulgaris</em> L.) cultivar s to soluble Al and to acid, low P soil conditions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Twelve dry bean cultivare were grown for seven days on filter paper soaked with nutrient solution containing a range of up to 10 mmol Al dm−3. Differential response to Al toxicity, measured as taproot elongation, occurred at Al concentrations of...
  5. Reduced leaf diffusive resistance with re-exposure of maize (<em>Zea mays</em> L.) to atrazine

    Reduced leaf diffusive resistance with re-exposure of maize (<em>Zea mays</em> L.) to atrazine

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Application and subsequent removal of atrazine in a nutrient solution resulted in changes in leaf diffusive resistance in maize. Re-exposure to atrazine elicited lower responses in leaf diffusive resistance, suggesting an improved tolerance to atrazine by maize. The time elapsed...
  6. A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    A field evaluation of the differential tolerance to soil acidity of forty-eight South African maize cultivars

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A field experiment was conducted on a Normandien clay loam (Plinthic Paleudult) to compare the acid tolerance of 48 commercially grown maize (Zea mays L.) cultivars. Cultivars were compared in terms of grain yield, plant height and leaf Al content...
  7. Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Preliminary studies on the inheritance of atrazine tolerance in maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Thirty-three maize (Zea mays L.) inbreds were screened for tolerance to atrazine (2-chloro-4-ethylamino-6- isopropylamino-1,3,5-triazine) in a glasshouse using a sand culture technique. Tolerance ranged from 95,7–51,0% of the control. The continuous pattern of tolerance exhibited by the inbreds indicated polygenic...
  8. 'n Nuwe benadering tot die bepaling van hitte-eenhede vir sonneblom

    'n Nuwe benadering tot die bepaling van hitte-eenhede vir sonneblom

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die konvensionele metode vir die bepaling van hitte-eenhede is vergelyk met 'n nuwe benadering. Data uit sewe kultivarproewe insluitende daaglikse maksimum en minimum temperature is gebruik om die hitte-eenhedevereistes van drie kultivars te bepaal. Twee vergelykings is gebruik, een verteenwoordig...
  9. The influence of photoperiod and temperature on the pre-flowering phase length of eleven soybean cultivars in northern Natal

    The influence of photoperiod and temperature on the pre-flowering phase length of eleven soybean cultivars in northern Natal

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The effect of photoperiod and temperature on the pre-flowering phase length of 11 soybean cultivars was studied. Heat units (10 to 30°C) and night hours (sunset to sunrise) were used as measures of temperature and photoperiod respectively. Highly significant negative...
  10. Relationship between DIMBOA content and atrazine tolerance in maize

    Relationship between DIMBOA content and atrazine tolerance in maize

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Data of two independent studies are presented to illustrate the relationship between DIMBOA content of maize inbreds and their tolerance to atrazine. Polynomial regression curves best described this relationship. R-squared values of 0,48 and 0,87 between DIMBOA content and tolerance...