PJB-2020-435
Correlation of varied photosynthetic, transpirational and associated traits of cucumber genotypes under hot environment
Mujahid Ali
Abstract
Heat sensitivity and its substantial impacts on morpho-physiological processes of plants are directly or indirectly associated with one another. Therefore, it is vital to determine the potential relationship of various attributes for the twenty-five cucumber genotypes under heat stress, which will assist in determining the competitive ability of these genotypes. On the overall basis of the performance of cucumber genotypes, stomatal conductance had a highly significant positive correlation with the transpiration rate whereas, the temperature of the leaf surface of cucumber showed highly significant negative correlation with chlorophyll contents. The number of leaves revealed a significantly negative correlation with stomatal conductance. Sub-stomatal CO2 had a highly significant negative correlation with stomatal conductance, while the demonstrated a significant positive correlation with the temperature of the leaf surface. It was observed that the number of leaves per plant showed a highly significant positive correlation with sub-stomatal CO2. The temperature of the leaf surface revealed a significant positive correlation with sub-stomatal CO2. Water use efficiency of cucumber genotypes apprehended greater correlation with the photosynthetic rate. Mass of fresh seedlings indicated a strong negative correlation with the temperature of the leaf surface. Thus findings of this correlation study could help in explaining the ecological constraints and deriving their solution in relation to morphology and physiology and ultimate gain of financial advantages under heat stress in the cucumber plants.
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