| 水稻灌浆结实期减源疏库对净光合速率的影响 |
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| 作者姓名： | 丁志勇 杨世民 袁继超 俄胜哲 喻晓坪 姚凤娟 |
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| 作者单位： | 四川农业大学农学院 四川雅安625014
(丁志勇，杨世民，袁继超，俄胜哲，喻晓坪)，四川农业大学农学院 四川雅安625014(姚凤娟) |
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| 基金项目： | 四川省科技厅“十五”重点攻关项目(02NG020-003)。 |
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| 摘 要： | 以常规中籼滇屯502和中粳合系39两个水稻品种为试验材料,研究水稻灌浆结实期减源疏库对水稻剑叶净光合速率的影响。结果表明,在控制光照强度和CO2浓度下,减源处理使水稻剑叶的净光合速率、表观量子效率和羧化效率增加,表现为反馈促进效应;不同源库类型的水稻品种对疏库的反应不同,疏库源限制型品种剑叶的净光合速率的反馈作用较小,而源库协调型或库限制型品种则较大。
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| 关 键 词： | 水稻 净光合速率 源库关系 表观量子效率 羧化效率 |
Effects of Leaf-cutting and Spikelet-thinning on Net Photosynthesis Rate of Rice During Grain Filling |
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| Authors: | Ding Zhingyong Yang Shimin Yuan Jichao E Shengzhe Yu Xiaoping Yao Fengjuan |
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| Abstract: | Effects of leaf cutting and spikelet-thinning on net phyotosynthesis rate of the rice flag leaf during grain filling were studied, taken Diantu502 (medium-maturing indica rice) and Hexi39 (medium-maturing japonica rice) as experiment materials. The results showed that treatment of leaf-cutting had feedback improvement effects on rice flag leaf in the control of light intensity and CO2 concentration, including increase of net photosynthesis rate, apparent quantum yield and carboxylation efficiency. Different source-sink model of rice showed different responses to spikelet thinning. Feedback effects of net photosynthesis rate of rice flag leaf on source limit yield were weaker, while the source-sink relation model or sink limit yield stronger. |
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| Keywords: | Rice Net Photosynthesis Rate Source-sink relations Apparent quantum yield Carboxylation efficiency |
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