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Title

The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading

مجله تولید گیاهان، دوره: 10، شماره: 4
Year: 1395
COI: JR_IJPPG-10-4_011
Language: EnglishView: 144
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Authors

L. Wang - Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Sichuan Agricultural University, Chengdu ۶۱۱۱۳۰, China
F. Deng - Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Sichuan Agricultural University, Chengdu ۶۱۱۱۳۰, China
T.Q. Lu - Mianyang Institute of Agricultural Sciences, Mianyang ۶۲۱۰۲۳, China.
M. Zhao - Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Sichuan Agricultural University, Chengdu ۶۱۱۱۳۰, China.

Abstract:

The measurement of carbon isotope discrimination (∆) provides an integrated insight into theresponse of plants to environmental change. To investigate the potential use of ∆ for identifyingshade tolerance in rice, five rice varieties were selected and artificially shaded (53% lightreduction) during the grain-filling period in 2010 and 2011, in Sichuan, China. Shadingtreatment had a significant influence on the ∆ of rice organs, resulting in clear increases in the ∆of stems plus sheaths (∆Sm), rice grains (∆Gm) and rice flour (∆Fm) at maturity, but a reductionin the ∆ of leaves (∆Lg) at the grain-filling stage. The relationships between ∆ and leafphotosynthetic and chlorophyll fluorescence characteristics and grain yield showed a closedependence on plant organs and light regimes. Under shading treatment, photosynthetic ratewas negatively associated with ∆Gm and the ∆ of stems plus sheaths at the grain-filling stage(∆Sg), whereas ∆Sm was significantly (PPSII (PSII), photochemical quenching (qP) and non-photochemical quenching (NPQ).Moreover, grain filling and grain weight under shading treatment were positively correlatedwith ∆Sg, but negatively related to ∆Sm in 2011. In contrast, a significantly (Passociation between grain weight and ∆Lg was observed in 2010. It was found that lower valuesof ∆Lg, ∆Sm and ∆Gm in rice indicated better light-harvesting and light-use capability and alsohigher grain filling and grain weight of rice.

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This Paper COI Code is JR_IJPPG-10-4_011. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/939120/

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If you want to refer to this Paper in your research work, you can simply use the following phrase in the resources section:
Wang, L. and Deng, F. and Lu, T.Q. and Zhao, M.,1395,The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading,https://civilica.com/doc/939120

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