| Relationship between leaf photosynthetic function at grain filling stage and yield in super high-yielding hybrid rice (Oryza sativa.L) |
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| 作者姓名： | 翟虎渠 曹树青 万建民 张荣铣 陆巍 李良璧 匡廷云 闵绍楷 朱德峰 程式华 |
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| 作者单位： | ZHAI Huqu，CAO Shuqing WAN Jianmin ZHANG Rongxian LU Wei，LI Liangbi KUANG Tingyun MIN Shaokai，ZHU Defeng & CHENG Shihua1. Rice Research Institute，Nanjing Agricultural University，Nanjing 210095，China;2. Institute of Botany，Chinese Academy of Sciences，Beijing 100093，China;3. Chinese National Rice Research Institute，Hangzhou 310006，China |
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| 基金项目： | This work was supported by the State Key Basic Research Development Plan，the Kuayue Plan of Chinese Agriculture Ministry |
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| 摘 要： | The characteristics of dry matter production before and after heading and the relationships between photosynthesis of flag leaves and dry matter accumulation in panicles were investigated on super high-yielding rice cv. Xieyou 9308 (the yield of up to 12 t/ha) with rice cv. Xieyou 63 as a control. The results showed that (i) the capacity of dry matter production before and after heading in Xieyou 9308, i.e. biomass and daily dry matter production, was remarkably higher than that in Xieyou 63, especially after heading; (ii) CO2 assimilation capacity in flag leaves in Xieyou 9308, namely Leaf Source Capacity (LSC), was also significantly higher than that in Xieyou 63, and the supply of photosynthate in leaves and the demand of grain filling were completely synchronous in Xieyou 9308, but photosynthetic function in flag leaves in Xieyou 63 declined sharply 20 days after heading and it was not enough to meet the demand of grain filling. These results confirmed that high efficient photosynthetic function in
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Relationship between leaf photosynthetic function at grain filling stage and yield in super high-yielding hybrid rice (Oryza sativa. L) |
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| ZHAI Huqu,CAO Shuqing WAN Jianmin ZHANG Rongxian LU Wei,LI Liangbi KUANG Tingyun MIN Shaokai,ZHU Defeng & CHENG Shihua. Rice Research Institute,Nanjing Agricultural University,Nanjing ,China.Relationship between leaf photosynthetic function at grain filling stage and yield in super high-yielding hybrid rice (Oryza sativa.L)[J].Science China Life sciences,2002,45(6):637-646. |
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| Authors: | ZHAI Huqu CAO Shuqing WAN Jianmin ZHANG Rongxian LU Wei LI Liangbi KUANG Tingyun MIN Shaokai ZHU Defeng & CHENG Shihua Rice Research Institute Nanjing Agricultural University Nanjing China |
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| Institution: | Rice Research Institute, Nanjing Agricultural University, 210095, Nanjing, China, rice@mail.njau.edu.cn. |
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| Abstract: | The characteristics of dry matter production before and after heading and tne relationships between photosynthesis of flag leaves and dry matter accumulation in panicles were investigated on super high-yielding rice cv. Xieyou 9308 (the yield of up to 12 t/ha) with rice cv. Xieyou 63 as a control. The results showed that (i) the capacity of dry matter production before and after heading in Xieyou 9308, i.e. biomass and daily dry matter production, was remarkably higher than that in Xieyou 63, especially after heading; (ii) CO2 assimilation capacity in flag leaves in Xieyou 9308, namely Leaf Source Capacity (LSC), was also significantly higher than that in Xieyou 63, and the supply of photosynthate in leaves and the demand of grain filling were completely synchronous in Xieyou 9308, but photosynthetic function in flag leaves in Xieyou 63 declined sharply 20 days after heading and it was not enough to meet the demand of grain filling. These results confirmed that high efficient photosynthetic function in leaves after heading and its complete synchronization with grain filling are the key approaches to super high yield of rice. |
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| Keywords: | super high-yielding photosynthesis grain filling rice |
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