Articles by Keyword: Seed Vigour

Search results for Seed Vigour

We found 114 results for you
  1. Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (<em>Zea mays</em> L.)

    Influence of sub-optimal imbibition temperatures on seed vigour and respiration in maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Germination and coleoptile growth of nine seed lots of maize (representing seven cultivars) were studied at 25°C (constant), 13°C (constant) and also at 7°C (7 days) followed by 25°C. Relative germination response to sub-optimal temperatures reflected relative differences in germination...
  2. Germination rate of maize (<em>Zea mays</em> L.) kernels. I. Relationships with kernel properties and water uptake

    Germination rate of maize (<em>Zea mays</em> L.) kernels. I. Relationships with kernel properties and water uptake

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Relationships were sought between germination rate and various kernel variables of 12 freshly harvested, undeteriorated seed lots of maize. Germination rate was positively correlated with water content of kernels at all sampling times up to 30 h of incubation and...
  3. Germination rate of maize (<em>Zea mays</em> L.) kernels. II. Relationships with respiration rate and adenosine triphosphate content

    Germination rate of maize (<em>Zea mays</em> L.) kernels. II. Relationships with respiration rate and adenosine triphosphate content

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Germination rate of freshly harvested, undeteriorated seed lots of maize was found to be positively correlated with rate of oxygen uptake of kernels and adenosine triphosphate (ATP) content of embryos, at 6 and 12 h of incubation. Respiration rate was...
  4. A comparison of seed vigour tests for maize (<em>Zea mays</em> L.)

    A comparison of seed vigour tests for maize (<em>Zea mays</em> L.)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A number of seed vigour tests were conducted on two groups of maize seed lots. One group consisted of six seed lots of different cultivars while the other group consisted of six sub-lots of one cultivar, artificially aged for different...
  5. The effect of a diurnal period of supra-optimal temperature on the seed vigour of sunflower

    The effect of a diurnal period of supra-optimal temperature on the seed vigour of sunflower

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The daily maximum temperature in the upper 20 mm of sandy soils is often higher than 45°C on cloudless days during November, December and January in the summer rainfall region of South Africa. At these supra-optimal temperatures, sunflower seedling vigour...
  6. The response of germinating sunflower seed to heat tolerance induction

    The response of germinating sunflower seed to heat tolerance induction

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Vigour of pre-emergent sunflower (Helianthus annuus L.) seedlings is reduced when daily peak soil temperatures exceed 44°C resulting in poor emergence. Seedlings of sorghum (Sorghum bicolor L. Moench) are known to acquire thermotolerance to temperatures of 45–50°C as a consequence...
  7. Effect of chemical seed treatment on the germination and seedling vigour of canola (<em>Brassica napus</em> var. <em>oleifera</em>)

    Effect of chemical seed treatment on the germination and seedling vigour of canola (<em>Brassica napus</em> var. <em>oleifera</em>)

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Incubation studies were conducted to determine effects of two chemical seed treatments (Cruiser & SA-combination) on the germination and seedling vigour of canola (cv. Varola 44) seed. Germination percentages of the Cruiser and SA-combination treated seeds were not significantly reduced...
  8. Comparison of <em>Eucalyptus grandis</em> Provenances and Seed Orchards in a Frost Frequent Environment

    Item type: Journal Article • Journal: South African Forestry Journal
    An international provenance trial of Eucalyptus grandis was established in southern Florida in 1980 and measured for growth and frost-tolerance through 8,8 years. The trial compared 20 Australian provenances 1) among themselves and 2) with seed orchard stock from Florida...
  9. Effects of season of burn on shrub survival, regeneration and structure in the Natal Drakensberg

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Four shrub species which tend to invade unburnt grassland were studied in field‐burning trials at Cathedral Peak in the Natal Drakensberg.
  10. Droë massaproduksie van vyf eenjarige <em>Medicago</em>‐genotipes in die sentrale oranje‐vrystaat, soos beinvloed deur planttyd

    Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa
    Bogrondse droë massa‐opbrengste (DM) van Medicago truncatula, cvv. Cyprus en Jemalong, M. aculeata var. inermis, cv. SA 4438, M. orbicularis, cv. SA 2552 en M. rugosa, cv. Paragosa wat op ses verskillende datums gevestig is, is in ‘n veldproef onder...