| 干旱胁迫对不同种源香椿主要叶绿素荧光参数的影响 |
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| 引用本文： | 杨玉珍,陈刚,彭方仁.干旱胁迫对不同种源香椿主要叶绿素荧光参数的影响[J].东北林业大学学报,2010,38(7). |
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| 作者姓名： | 杨玉珍 陈刚 彭方仁 |
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| 作者单位： | 郑州师范学院,郑州,450044;南京林业大学 |
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| 基金项目： | 国家自然科学基金，河南省科技攻关项目 |
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| 摘 要： | 以江苏南京、四川广元、湖南洞口、湖北随州、河南西峡、陕西安康6个种源香椿苗木为材料进行盆栽试验,研究干旱胁迫对香椿苗木3个主要叶绿素荧光参数的影响。结果表明:6个种源香椿苗木不同荧光参数的变化趋势并不完全一致。在持续性胁迫期间,6个种源香椿叶片的Fv/Fm值下降幅度较小;恢复供水后,除湖南洞口和湖北随州种源外,其余4个种源几乎都恢复至正常供水的水平。随着胁迫的持续,光化学猝灭系数(qP)受影响程度加大;胁迫末期,除河南西峡和陕西安康2个种源外,其余4个种源的下降幅度均增大,且湖南洞口和湖北随州2个种源的下降幅度最大,恢复供水后几乎没有恢复,说明这2个种源叶片的光化学淬灭受胁迫的影响最大。非光化学淬灭系数(qN)在胁迫初期、胁迫末期(四川广元种源除外)和复水后(湖北随州种源除外)有不同程度的增大,避免了过剩光能对光合器官的伤害;但胁迫中期,6个种源呈现降低趋势。各种源3个主要荧光参数的动态变化与其抗旱性强弱等级一致。
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| 关 键 词： | 香椿 种源 干旱胁迫 叶绿素荧光参数 |
Effects of Drought Stress on Chlorophyll Fluorescence Parameters in Seedlings of Different Toona sinensis Provenances |
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| Yang Yuzhen,Chen Gang,Peng Fangren.Effects of Drought Stress on Chlorophyll Fluorescence Parameters in Seedlings of Different Toona sinensis Provenances[J].Journal of Northeast Forestry University,2010,38(7). |
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| Authors: | Yang Yuzhen Chen Gang Peng Fangren |
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| Institution: | Yang Yuzhen,Chen Gang(Department of Life Sciences,Zhengzhou Normal College,Zhengzhou 450044,P. R. China),Peng Fangren(Nanjing Forestry University) |
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| Abstract: | An experiment was conducted to study the effects of drought stress on three main parameters of chlorophyll fluorescence in Toona sinensis potted seedlings from six provenances,including Nanjing of Jiangsu,Guangyuan of Sichuan,Dongkou of Hunan,Suizhou of Hubei,Xixia of Henan and Ankang of Shanxi. Results showed that the changing tendencies of the parameters were not completely identical. With the continuance of drought stress,the decreasing extent of Fv/Fm of T.sinensis leaves was very small for the six prov... |
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| Keywords: | Toona sinensis Provenances Drought stress Chlorophyll fluorescence parameters |
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