| 干旱对南五味子和海南红豆幼苗气体交换参数的影响 |
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| 引用本文： | 杨振意,薛立,张柔,郭淑红.干旱对南五味子和海南红豆幼苗气体交换参数的影响[J].湖南林业科技,2012(1):21-23,74. |
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| 作者姓名： | 杨振意 薛立 张柔 郭淑红 |
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| 作者单位： | 华南农业大学林学院,广东广州510642 |
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| 基金项目： | 广东省林业局资助项目（F09054）;广东省林业科技创新专项资金项目（2008KJCX008一01）. |
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| 摘 要： | 对海南红豆和南五味子的1年生实生苗在不同强度干旱胁迫下的叶片气体交换参数进行研究。结果表明:随着干旱胁迫的加强,南五味子和海南红豆的净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和叶片水分利用率(WUE)不断下降,而胞间CO2浓度(Ci)为先下降后上升,气孔限制值(Ls)呈现先上升后下降;重度胁迫时海南红豆的Pn、Gs、Tr和WUE均比南五味子大,说明前者对干旱有更强的适应性。
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| 关 键 词： | 干旱胁迫 海南红豆 南五味子 气体交换参数 |
Effects of drought stress on Kadsura longipedunculata leaf gas exchange parameters of and Ormosia pinnata seedlings |
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| YANG Zhenyi,XUE Li,ZHANG Rou,GUO Shuhong.Effects of drought stress on Kadsura longipedunculata leaf gas exchange parameters of and Ormosia pinnata seedlings[J].Hunan Forestry Science & Technology,2012(1):21-23,74. |
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| Authors: | YANG Zhenyi XUE Li ZHANG Rou GUO Shuhong |
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| Institution: | (College of Forestry, South China Agricultural University, Guangzhou 510642, China) |
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| Abstract: | The effect of drought stress on leaf gas exchange of Ormosia pinnata and Kadsura longipedtmculata seedlings were studied with test material of one-year-old seelding. The result showed that, net photosynthetic rate （Pn）, stomatal conductance （ Gs ）, tran- spiration rate （Tr） , and water use efficiency （WUE） decreased with increasing drought stress, whereas intercellular carbon dioxide concentration （ Ci ） decreased and then increased and stomatal limits （Ls ） increased followed by a decrease. Pn, Gs, Tr, and WUE of O. pinnata were bighter in contrast with/C longipedunculata in severe stress, which indicates that O. pinnata has a better adapta- bility to drought stress compared with K. longipedunctdata. |
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| Keywords: | drought stress Ormosia pinnata Kadsura longipedunculata gas exchange |
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