biologia plantarum

Biologia plantarum 39:381-388, 1997 | DOI: 10.1023/A:1001065930611

Response of French bean cultivars to water deficits: Changes in endogenous hormones, proline and chlorophyll

K.K. Upreti¹, G.S.R. Murti¹, R.M. Bhatt²

¹ Indian Institute of Horticultural Research, Hessaraghatta, Bangalore, India

² India

Effects of water stress at different stages of plant growth on leaf relative water content (RWC), osmotic potential (Ψos) and changes in contents of chlorophyll, abscisic acid (ABA), zeatin riboside (t-ZR), ethylene and proline in six cultivars of French bean (Phaseolus vulgaris L.) were studied. Under water stress, Ψos and RWC were highest in cv. Contender and lowest in cvs. IIHR-909 and Sel-2. The increase in contents of ABA and proline was marked in cv. Contender followed by cv. UPF-626. Decrease in t-ZR and chlorophyll contents was prominent in cv. IIHR-909. Ethylene production surged in all the cultivars under 4- and 8-d stress and declined under 12-d stress.

Keywords: abscisic acid; drought tolerance; ethylene; osmotic potential; Phaseolus vulgaris; zeatin riboside

Subjects: bean cultivars, water deficit; chlorophyll, water stress; cultivar differences, chlorophyll, water relations; drought tolerance, chlorophyll; ethylene, water stress; French bean cultivars, water deficit; osmotic potential, water stress; Phaseolus vulgaris; zeatin riboside, water stress

Published: November 1, 1997  Show citation