Ecology, Environment and Conservation Paper

Vol 22, Issue 4, 2016; Page No.(1763-1773)

EFFECT OF WATER STRESS AT FLOWERING STAGE ON MORPHOPHYSIOLOGICAL CHARACTERISTICS OF COTTON (GOSSYPIUM HIRSUTUM L.) CULTIVARS IN SOUTHERN IRAN

Vahid Ghodrat, Omid Alizadeh, Reza Hamidi, Forood Bazrafshan and Shahram Sharafzadeh

Abstract

This work concerns the effect of water stress at flowering stage on growth of root system, shoot and leaf of different cotton cultivars. To this end two experiments have been conducted in plastic pots, in two distinct areas (Kavar and Shiraz) in southern Iran during 2015 growing season. The experimental design used in both experiments was split-plot in a randomized complete block design with three replications. The main factor was the level of irrigation including normal irrigation (every seven days), stopping irrigation for 14 and 21 days at the beginning of flowering stage. Subsidiary factor was 30 cotton cultivars. Under water stress all measured parameters were reduced compared to control and also showed had positive and significant relation to one another. Some cultivars such as Termez-14, Kisa, Bley-zoor, T2 and T3 showed acceptable resistance to water stress.

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