Author(s):

PB Kardile, MV Rakshe, MM Burondkar and SG Bhave

Abstract: Present research was conducted to assess the performance of four cowpea genotypes (Fodder cowpea-1, konkan sadabahar, ACP-109, PCP-9702-1) under moisture stress conditions, at research farm Department of Agricutural Botany, COA, Dapoli, DBSKKV, Dapoli (M.S.). The photosynthesis rate showed variability amongst the genotypes studied under different water stressed conditions, itincreased with advancing age of crop. At 45 DAS, genotype ACP-109 showed less reduction in rate of photosynthesis under strong (8.72 %) stress but under severe (9.15 %) stress konkan sadabahar showed less reduction as compared to all other genotypes studied.This clearly indicates that it was because of this the genotypes were able to maintain low leaf temperature which is a desirable character.. Transpiration rate showed variability amongst the genotypes studied, at 45 and 75 DAS. At 45 DAS genotypes ACP-109 and Konkan sadabahar showed less reduction in transpiration rate under strong (16.03 %), (20.05 %) and severe (34.14 %), (44.67 %) stresses than all other genotypes studied indicating the ability of the genotype to retain more moisture in plants under water stress condition. The stomatal conductance increased with advancing age of crop. At 45 DAS genotypes Konkan sadabahar and ACP-109 showed less reduction in rate of stomatal conductance under strong (2.09 %), (2.33 %) and severe (13.34 %) and (19.74 %) stress condition than all other genotypes studied. Genotypes Konkan sadabahar and ACP-109 showed less reduction in rate of stomatal conductance indicating the sustainability of genotypes more robustly under water stress condition, with better physiological performence

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