Elevated CO2 concentration enhances the role of the ear to the flag leaf in determining grain yield of wheat期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Elevated CO2 concentration enhances the role of the ear to the flag leaf in determining grain yield of wheat

Authors:	C -W Zhu J -G Zhu G Liu Q Zeng Z -B Xie J Pang Z -Z Feng H -Y Tang L Wang

Institution:	(1) State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, P.R. China;(2) Department of Global Agricultural Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan

Abstract:	Net photosynthetic rate (P _N) of ear and flag leaf during grain filling stage and grain yield of plants with non-darkened or darkened flag leaf or darkened ear were examined in two different CO₂ concentrations: ambient (AC) and AC+200 μmol mol⁻¹ (EC). Ear showed much higher enhancement (56 %) of P _N than flag leaf (23 %) under EC. Moreover, CO₂ enrichment shortened the photosynthetic duration of flag leaf relative to ear. In this way the ratio of ear to flag leaf contribution to grain yield increased from 1.18 (AC) to 1.39 (EC).

Keywords:	Additional" target="_blank">Additional net photosynthetic rate Triticum aestivum
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