Effect of water stress on plant water status of french bean (Phaseolus vulgaris L.)
2010
Choudhury, A.K. | Karim, M.A. | Haque, M. Moynul | Khaliq, Q.A. | Ahmed, J.U. | Hossain, M.M.
An experiment was conducted in poly-tunnel at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh during the winter season of 2006_07 to analyze the water status of French bean grown under water stress conditions. Seven tolerance genotypes (BB24, BB43, BB45, BB41, BB36, BARI bushbean-2 and BB04) of french bean were evaluated under continuous water stress and control conditions. The mid-day value of RWC at 13:00 hours decreased remarkably and this trend was more conspicuous in BB04 and BARI bushbean-2 than that of BB24 and BB43. Under stress midday drop of RWC was maximum in the BB04 and BARI bushbean-2 while it was minimum in the genotypes BB24 and BB43. Xylem exudation rate and cuticular transpiration of the genotypes varied significantly. The relationship between exudation rate and cuticular transpiration, midday drop of RWC and seed yield correlated significantly. However, there were negative correlation between midday drop of RWC with pods number and seed yield of all the French bean genotypes.
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