Articles by Keyword: Chlorophyll Concentration

Search results for Chlorophyll Concentration

We found 76 results for you
  1. Elucidation of seasonal pigmentation patterns in the involucral leaves of <em>Leucadendron</em> ‘Safari Sunset’

    Elucidation of seasonal pigmentation patterns in the involucral leaves of <em>Leucadendron</em> ‘Safari Sunset’

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    This study investigates seasonal pigmentation patterns found in the involucral leaves of Leucadendron ‘Safari Sunset’, with the long-term aim of colour manipulation. Treatments comprised deconed shoots and shoots in which the opening of the flower head was physically prevented. During...
  2. Photosynthesis versus irradiance relationships in the Atlantic sector of the Southern Ocean

    Photosynthesis versus irradiance relationships in the Atlantic sector of the Southern Ocean

    Item type: Journal Article • Journal: African Journal of Marine Science
    Eleven incubation experiments were conducted in the South Atlantic sector of the Southern Ocean to investigate the relationship between new production (ρNO–3), regenerated production (ρNH+4), and total carbon production (ρC) as a function of varying light. The results show substantial...
  3. Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils

    Effect of exchangeable sodium and phosphogypsum on the hydraulic properties of several South African soils

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The susceptibility of soils to the deleterious effects of sodicity was assessed for samples which varied with respect to physical, mineralogical and other properties. For this purpose soil samples were collected from different locations in South Africa. The effect of...
  4. Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs

    Effect of Ca, K and B supply on water-stress induced chlorophyll loss from tobacco and cotton leaf discs

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A study was made of the influence of Ca:K ratios and B levels on the chlorophyll content of tobacco and cotton leaves grown under glasshouse conditions. Excised leaf discs were floated on a solution of polyethylene glycol 6000 to study...
  5. Die swawelstatus van besproeiingsgronde onder veranderende bemestingspraktyke

    Die swawelstatus van besproeiingsgronde onder veranderende bemestingspraktyke

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Die effek van die gebruik van swawelvrye teenoor swawelbevattende bemestingstowwe op die swawelstatus van 'n Mangano-grond van Vaalharts, is met behulp van 'n potproef ondersoek. Waar swawelvrye bemestingstowwe gebruik is was gebreksimptome na die derde snysel reeds duidelik sigbaar by...
  6. A turbidimeter for measuring soil-particle concentration in suspensions

    A turbidimeter for measuring soil-particle concentration in suspensions

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    A turbidimeter was designed and constructed to determine the degree of dispersion associated with different treatments of soil samples in suspension. Measurement is based on the transmission of light through a dispersed soil suspension. The experimental array of light source,...
  7. The association between residual chlorophyll and grassy taste in black tea

    The association between residual chlorophyll and grassy taste in black tea

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The ‘grassy’ taste in some South African and Central African black teas is not up to tea tasters' and buyers' standards. It has been shown by a number of researchers that this taste is associated with volatiles in the tea...
  8. Nitrogen fertilization of tea: Effect of tea leaf plucking criteria on chlorophyll and quality parameters

    Nitrogen fertilization of tea: Effect of tea leaf plucking criteria on chlorophyll and quality parameters

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The purpose of this investigation was to establish the possible effect of plucking criteria on the quality of black tea produced with different levels of nitrogen fertilization. Increases in leaf age (norms) resulted in increased total chlorophyll in fresh green...
  9. Leaf characters of various tea clones in relation to quality

    Leaf characters of various tea clones in relation to quality

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    The leaves of ten different tea clones were investigated to explore the possibility that structural differences exist between clones and that morphological characters relate to the quality of the infusion. Our results revealed a significant negative correlation between TF-values and...
  10. Protein turnover: possible contributing factor in determining drought tolerance in <em>Nicotiana tabacum</em> L.

    Protein turnover: possible contributing factor in determining drought tolerance in <em>Nicotiana tabacum</em> L.

    Item type: Journal Article • Journal: South African Journal of Plant and Soil
    Drought 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)...