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Title: Drought Priming at Vegetative Growth Stage Enhances Nitrogen-Use Efficiency Under Post-Anthesis Drought and Heat Stress in Wheat
Author: S. Liu, X. Li, D. H. Larsen, X. Zhu, F. Song and F. Liu
Corresponding Author: Li, X. ; Liu, F.
Source: Journal of Agronomy and Crop Science
Issued Date: 2017
DOI: 10.1111/jac.12190
Volume: 203, Issue:1, Pages:29-40
Abstract: To study the effects of early drought priming at 5th-leaf stage on grain yield and nitrogen-use efficiency in wheat (Triticum aestivum L.) under post-anthesis drought and heat stress, wheat plants were first exposed to moderate drought stress (drought priming; that is, the leaf water potential reached ca. -0.9 MPa) at the 5th-leaf stage for 11days, and leaf water relations and gas exchange rates, grain yield and yield components, and agronomic nitrogen-use efficiency (ANUE) of the primed and non-primed plants under post-anthesis drought and heat stress were investigated. Compared with the non-primed plants, the drought-primed plants possessed higher leaf water potential and chlorophyll content, and consequently a higher photosynthetic rate during post-anthesis drought and heat stress. Drought priming also resulted in higher grain yield and ANUE in wheat under post-anthesis drought and heat stress. Drought priming at vegetative stage improves carbon assimilation and ANUE under post-anthesis drought and heat stress and their combination in wheat, which might be used as a field management tool to enhance stress tolerance of wheat crops to multiple abiotic stresses in a future drier and warmer climate.
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Content Type: 期刊论文
URI: http://ir.iga.ac.cn/handle/131322/7535
Appears in Collections:湿地与全球变化学科组_期刊论文

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