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Wang, L., Deng, F., Lu, T.Q., Zhao, M., Pu, Sh.L., Li, Sh.X., Ren, W.J.. (1395). The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading. , 10(4), 551-564. doi: 10.22069/ijpp.2016.3049
L. Wang; F. Deng; T.Q. Lu; M. Zhao; Sh.L. Pu; Sh.X. Li; W.J. Ren. "The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading". , 10, 4, 1395, 551-564. doi: 10.22069/ijpp.2016.3049
Wang, L., Deng, F., Lu, T.Q., Zhao, M., Pu, Sh.L., Li, Sh.X., Ren, W.J.. (1395). 'The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading', , 10(4), pp. 551-564. doi: 10.22069/ijpp.2016.3049
Wang, L., Deng, F., Lu, T.Q., Zhao, M., Pu, Sh.L., Li, Sh.X., Ren, W.J.. The relationships between carbon isotope discrimination and photosynthesis and rice yield under shading. , 1395; 10(4): 551-564. doi: 10.22069/ijpp.2016.3049

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

International Journal of Plant Production
مقاله 11، دوره 10، شماره 4، دی 2016، صفحه 551-564    اصل مقاله (841.35 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22069/ijpp.2016.3049
نویسندگان
L. Wang1؛ F. Deng1؛ T.Q. Lu2؛ M. Zhao3؛ Sh.L. Pu3؛ Sh.X. Li3؛ W.J. Ren* 3
1Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
2Mianyang Institute of Agricultural Sciences, Mianyang 621023, China.
3Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Sichuan Agricultural University, Chengdu 611130, China.
چکیده
The measurement of carbon isotope discrimination (∆) provides an integrated insight into the
response of plants to environmental change. To investigate the potential use of ∆ for identifying
shade tolerance in rice, five rice varieties were selected and artificially shaded (53% light
reduction) during the grain-filling period in 2010 and 2011, in Sichuan, China. Shading
treatment 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 reduction
in the ∆ of leaves (∆Lg) at the grain-filling stage. The relationships between ∆ and leaf
photosynthetic and chlorophyll fluorescence characteristics and grain yield showed a close
dependence on plant organs and light regimes. Under shading treatment, photosynthetic rate
was 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 correlated
with ∆S
g, 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 values
of ∆L
g, ∆Sm and ∆Gm in rice indicated better light-harvesting and light-use capability and also
higher grain filling and grain weight of rice.

کلیدواژه‌ها
Carbon isotope discrimination؛ Light regime؛ Photosynthesis؛ Rice
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