Effects of Water Stress on Leaves and Seeds of Bean (Phaseolus vulgaris L.)

Authors : Ali Akbar GHANBARI, Seyyed Hassan MOUSAVI, Ahmad Mousapour GORJI, İdupulapati RAO

Pages : 73-77

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Publication Date : 2013-01-01

Article Type : Research Paper

Abstract :To determine the changes of nitrogen contents in the leaves and seeds of common bean insert ignore into journalissuearticles values(Phaseolus vulgaris L.); genotypes under contrasting moisture regimes, two field experiments were conducted as split-plot in a randomized complete block design with four replications. Two levels of irrigation insert ignore into journalissuearticles values(irrigation after 55-60 and 100-110 mm evaporation from class A pan, respectively); and eight genotypes including white beans , red beans insert ignore into journalissuearticles values(Akhtar, D81083 and AND1007); and Chitti beans insert ignore into journalissuearticles values(KS21486, MCD4011 and COS16); were studied in the main- and sub-plots, respectively.Leaf nitrogen insert ignore into journalissuearticles values(N); and proline contents were measured at two growth stages insert ignore into journalissuearticles values(pre-flowering and pod filling period);. Grain yield, seed N and seed protein contents were measured at harvest. The results indicated that white beans had lower leaf N and seed protein contents than red and Chitti beans under both irrigation regimes. Under drought conditions, AND1007 and COS16 showed markedly higher levels of accumulation of leaf N and proline. Seed protein was higher in Chitti beans. Water deficit reduced the leaf N by 19% and 28% at two growth stages and grain yield by 39.8%. By contrast, proline content of all genotypes was increased by 105%. Seed N and protein contents had the lowest reductions under drought, while increasing N and proline contents in the leaves increased grain yield under this condition. Besides, lower values of seed N and protein is associated with higher yields of genotypes. Totally, based on the grain yield, red beans were more drought-susceptible than white and Chitti groups
Keywords : Bean, drought, minerals, nitrogen, yield