数字农科院2.0

Leaf photosynthesis and yield components of mung bean under fully open-air elevated [CO2]

文献类型： 外文期刊

作者： Gao Ji;Han Xue;Lin Er-da;Hao Xing-yu;Gao Ji;Li Ping;Zong Yu-zheng;Dong Qi;Hao Xing-yu;Seneweera, Saman

作者机构：

关键词： free air carbon dioxide enrichment (FACE);photosynthetic pigment;photosynthesis;chlorophyll fluorescence;yield;mung bean

期刊名称： JOURNAL OF INTEGRATIVE AGRICULTURE

ISSN： 2095-3119

年卷期： 2015 年 14 卷 5 期

页码：

收录情况： SCI

摘要： Mung bean (Vigna radiata L.) has the potential to establish symbiosis with rhizobia, and symbiotic association of soil micro flora may facilitate the photosynthesis and plant growth response to elevated [CO2]. Mung bean was grown at either ambient CO2 400 pmol mol(-1) or [CO2] ((550 +/- 17) pmol mol(-1)) under free air carbon dioxide enrichment (FACE) experimental facility in North China. Elevated [CO2] increased net photosynthetic rate (P-n), water use efficiency (WUE) and the non-photochemical quenching (NPQ) of upper most fully-expanded leaves, but decreased stomatal conductance (G(s)), intrinsic efficiency of PSI I (F-v"/F-m"), quantum yield of PSII (phi(PSII)) and proportion of open PSII reaction centers (q(p)). At elevated [CO2], the decrease of F-v'/F-m', phi(PSII), q(p) at the bloom stage were smaller than that at the pod stage. On the other hand, P-n was increased at elevated [CO2] by 18.7 and 7.4% at full bloom (R2) and pod maturity stages (R4), respectively. From these findings, we concluded that as a legume despite greater nutrient supply to the carbon assimilation at elevated [CO2], photosynthetic capacity of mung bean was still suppressed under elevated [CO2] particularly at pod maturity stage but plant biomass and yield was increased by 11.6 and 14.2%, respectively. Further, these findings suggest that even under higher nutrient acquisition systems such as legumes, nutrient assimilation does not match carbon assimilation under elevated [CO2] and leads photosynthesis down-regulation to elevated [CO2].

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