J.M. HAN, J. FLEXAS, D.L. XIONG, J. GALMÉS, Y.L. ZHANG
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引用次数: 0
Abstract
Photosynthesis is extremely sensitive to drought and decreases due to co-occurring stomatal, mesophyll, and biochemical limitations. Few studies have shown the effects of a drought cycle (drought-rewatering) on photosynthesis and water-use efficiency (WUE) in cotton. Here, the dynamics of photosynthesis in upland (Gossypium hirsutum) and pima (G. barbadense) cotton were analyzed during a drought cycle. While both species decreased net CO2 assimilation rate (PN) to a similar extent under drought, in pima cotton rewatering rapidly restored PN, the stomatal conductance (gs), the maximum carboxylation rate (Vcmax), and the maximum electron transport rate above the control level. Meanwhile, the response of leaf intrinsic WUE (WUEi) to drought and recovery was different between the two cotton species, which was mainly co-regulated by Vcmax and gs. In conclusion, pima and upland cotton exhibit different response patterns of PN and WUEi during the whole process of drought and recovery.
期刊介绍：
Photosynthetica publishes original scientific papers and brief communications, reviews on specialized topics, book reviews and announcements and reports covering wide range of photosynthesis research or research including photosynthetic parameters of both experimental and theoretical nature and dealing with physiology, biophysics, biochemistry, molecular biology on one side and leaf optics, stress physiology and ecology of photosynthesis on the other side.
The language of journal is English (British or American). Papers should not be published or under consideration for publication elsewhere.
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