| Photoinhibitive and Recovery Properties of Hybrid RiceⅡ You 129 under Field Conditions |
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| 作者姓名： | XuXiao-ming TANGYun-lai WANGYing LuWei DAIXin-bin ZHANGRongxian KUANGTing-yun |
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| 作者单位： | [1]AgronomyDepartment,NanjingAgriculturalUniversity,Nanjing210095,China [2]InstituteofBotany,ChineseAcademyofSciences,Beijing100093,China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | Photoinhibitive properties of super-high-yielding hybrid riceⅡ you 129 and its adaptation mechanism to strong light stress were investigated by measuring the light-response curve, diurnal variations of net photosynthetic rate and chlorophyll fluorescence parameters of Ⅱ you 129 leaves and compared with Shanyou 63. Photoinhibition of rice flag leaves under field conditions mainly resulted from the increase of thermal dissipation, especially for thermal dissipation depended on the xanthophyll circle, but no destruction of photosynthetic apparatus occurred. Potentially super-high-yielding hybrid rice Ⅱ you 129 was more tolerant to photoinhibition than Shanyou 63, because it had higher light saturation intensity and maximum net photosynthetic rate; more active xanthophyll cycle, and more rapid recovery ability after photoinhibition.
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| 关 键 词： | 水稻 杂交品种 光诱导 恢复能力 叶绿素荧光 品种资源 |
Photoinhibitive and Recovery Properties of Hybrid Rice Ⅱ You 129 under Field Conditions |
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| XuXiao-ming TANGYun-lai WANGYing LuWei DAIXin-bin ZHANGRongxian KUANGTing-yun.Photoinhibitive and Recovery Properties of Hybrid Rice Ⅱ You 129 under Field Conditions[J].Rice science,2003,11(1):33-37. |
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| Authors: | XU Xiao-ming TANG Yun-lai WANG Ying LU Wei DAI Xin-bin ZHANG Rong-Xian KUANG Ting-yun |
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| Abstract: | Photoinhibitive properties of super-high-yielding hybrid rice Ⅱ you 129 and its adaptation mechanism to strong light stress were investigated by measuring the light-response curve, diurnal variations of net photosynthetic rate and chlorophyll fluorescence parameters of Ⅱ you 129 leaves and compared with Shanyou 63. Photoinhibition of rice flag leaves under field conditions mainly resulted from the increase of thermal dissipation, especially for thermal dissipation depended on the xanthophyll circle, but no destruction of photosynthetic apparatus occurred. Potentially super-high-yielding hybrid rice Ⅱyou 129 was more tolerant to photoinhibition than Shanyou 63, because it had higher light saturation intensity and maximum net photosynthetic rate; more active xanthophyll cycle, and more rapid recovery ability after photoinhibition. |
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| Keywords: | rice photoinhibition chlorophyll fluorescence xanthophyll cycle |
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