| 苏打盐碱胁迫下水稻齐穗期剑叶光合特性对CO_2浓度增强的响应 |
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| 引用本文： | 杨福,梁正伟,王志春,陈渊.苏打盐碱胁迫下水稻齐穗期剑叶光合特性对CO_2浓度增强的响应[J].华北农学报,2009,24(1). |
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| 作者姓名： | 杨福 梁正伟 王志春 陈渊 |
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| 作者单位： | 中国科学院,东北地理与农业生态研究所,吉林,长春,130012 |
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| 基金项目： | 中国科学院知识创新工程重大项目，国家科技支撑项目，吉林省产业技术研究与开发专项基金 |
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| 摘 要： | 利用LI-6400P型红外气体分析仪测定了苏打盐碱胁迫下水稻剑叶的净光合速率(Pn)、气孔导度(Gs)、胞间CO2浓度(Ci)、蒸腾速率(Tr)、羧化效率(CE)及水分利用率(WUE)对模拟CO2浓度增强的响应.结果表明:无论是盐碱胁迫(S)还是非盐碱胁迫(NS)水稻剑叶的Pn随Ci的增加而呈上升趋势,增幅趋缓,最终趋于动态平衡;盐碱胁迫使不同CO2浓度下的Pn降低,同时也降低了水稻叶片的CE,提高了水稻叶片的CO2补偿点,降低了水稻叶片的光呼吸(Rp);Gs与Tr随Ci的变化趋势基本相同,但盐碱胁迫降低了水稻叶片的Gs和Tr;无论是非盐碱(NS)还是盐碱胁迫(S)水稻叶片的WUE随Ci的升高显著增大,盐碱胁迫却加大了水稻叶片的WUE.
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| 关 键 词： | 水稻 盐碱 CO2浓度 光合生理特性 |
Response of Photosynthetic Characteristics of the Flag Leaves at Rice Full Heading Time to Elevated CO_2 Concentration under Soda-salinization Stress |
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| YANG Fu,LIANG Zheng-wei,WANG Zhi-chun,CHEN Yuan.Response of Photosynthetic Characteristics of the Flag Leaves at Rice Full Heading Time to Elevated CO_2 Concentration under Soda-salinization Stress[J].Acta Agriculturae Boreali-Sinica,2009,24(1). |
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| Authors: | YANG Fu LIANG Zheng-wei WANG Zhi-chun CHEN Yuan |
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| Institution: | Northeast Institute of Geography and Agricultural Ecology;Chinese Academy of Sciences;Changchun 130012;China |
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| Abstract: | The effect of elevated CO2 concentration on photosynthetic characteristics of the flag leaves at rice full heading time was studied under soda-salinization stress.The response of photosynthetic rate(Pn)can be divided into three periods:linear increase period under low intercellular CO2 concentration(Ci);smooth increase period under moderate Ci;dynamic balance period under high Ci.But soda-salinization stress decreased photosynthetic rate(Pn)and carboxylation efficiency(CE)at each intercellular CO2 concentra... |
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| Keywords: | Rice Soda-sodicity CO2 concentration Photosynthetic physiological characteristics |
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