Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 62, Issue 1, Pages 125-129Publisher
ELSEVIER
DOI: 10.1016/j.colsurfb.2007.09.025
Keywords
biomass yield; drought; gravimetric method; leaf area duration; net assimilation rate; water use efficiency
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In the present investigation, five varieties of okra (Abelmoschus esculentus (L.) Moench.) were screened for their water use efficiency under two water regimes, viz., 60% and 100% filed capacity. Drought stress was imposed at 60% field capacity from 30 to 70 days after sowing, while the control pots were maintained at 100% field capacity throughout the period of entire growth. Biomass and yield, leaf area duration, cumulative water transpired water use efficiency, net assimilation rate, mean transpiration rate and harvest index under water deficit level were measured. Water use efficiency significantly increases in all the okra varieties under water-limited environment. Drought stress decreased the biomass and yield, leaf area duration, cumulative water transpired, net assimilation rate, mean transpiration rate and harvest index in the okra varieties studied. But among the varieties, variety JK Haritha showed better results. None of the varieties studied had showed increased drought tolerance than the control. (c) 2007 Elsevier B.V. All rights reserved.
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