Journal of Food, Agriculture and Environment

Photosynthetic performance of Triticum aestivum L. in response to water and nitrogen deficit

Author(s):

Rui-Xin Shao ¹, Jian-Hui Chen ¹, Feng Miao ¹, Guang-Wei Zhao ^{1, 2}, Qing-Hua Yang ¹*

Recieved Date: 2013-07-18, Accepted Date: 2013-10-10

Abstract:

Water and nitrogen deficits are key factors that affect the photosynthesis of wheat in arid and semi-arid areas. Two wheat (Triticum aestivum L.) cultivars were selected to study plant photosynthesis and signals, including nitric oxide (NO) and cytokinin (CTK), under water- and nitrogen-deficient conditions. The results indicated that the photosynthetic performance (performance index, PI) as well as its component parameters decreased when wheat was subjected to water or nitrogen stress. P_ET, the main component of decreased PI accounted for 64% of the reduction in PI of the general wheat variety under nitrogen stress. P_TR was the main component of water and nitrogen cross-stress. The leaf signal density of iP+iPA, Z+ZR and NO decreased whereas that of DHZ+DHZR increased under water and nitrogen deficit, especially in the arid wheat variety. The decrease in P_ET and P_TR affected the transport of photosynthetic electrons as well as the fixation of CO₂ and showed close relationships with the levels of NO and CTK in plants.

Keywords:

Water deficit, nitrogen deficit, photosynthesis, nitric oxide, cytokinin

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 1252-1256

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