Browsing by Author "Kurup, V.V.G.K."

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    Impact of atmospheric and soil drought on the leaf water potential and membrane stability in coconut genotypes
    (2007-02) Kurup, V.V.G.K.; Voleti, S.R.; Rajagopal, V.
    The seasonal variations in stress parameters like leaf water potential and electrolyte leakage were studied in the popular coconut cultivar namely West Coast Tall (WCT) and the two hybrids WCT x Chowghat Orange Dwarf (COD) and COD X WCT, in relation to weather variables and soil moisture content. There was a significant difference in physiological parameters among the genotypes only during the stress period, characterized by high evaporative demand. The hybrid COD x WCT was found to be most sensitive to moisture stress as indicated by low leaf water potential, and high electrolyte leakage. This implies that the tall genotype and the hybrid with tall female parent (WCT X COD) are relatively more tolerant to moisture stress than the hybrid with dwarf female parent (COD X WCT).
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    Influence of Weather Variables on the Content and Composition of Leaf Surface Wax in Coconut
    (2007-02) Kurup, V.V.G.K.; Voleti, S.R.; Rajagopal, V.
    The epicuticular wax content (ECW) was estimated in rainfed coconut genotypes namely, West Coast Tall (WCT), WCT x Chowghat Orange Dwarf (COD) and COD x WCT between October, 1987 and August, 1988, with simultaneous measurement of weather parameters like light, temperature and relative humidity. The weather data revealed the prevalence of atmospheric and soil drought between January and May, 1988. The ECW content was higher during drought than during the non-stress periods. Thin layer chromatographic separation of the wax components indicated their qualitative differences at different seasons and among coconut genotypes.