| 4种阔叶幼苗对PEG模拟干旱的生理响应 |
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| 引用本文： | 冯慧芳,薛立,任向荣,傅静丹,郑卫国,史小玲.4种阔叶幼苗对PEG模拟干旱的生理响应[J].生态学报,2011,31(2):371-382. |
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| 作者姓名： | 冯慧芳 薛立 任向荣 傅静丹 郑卫国 史小玲 |
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| 作者单位： | 1. 华南农业大学林学院,广州,510642
2. 华南农业大学林学院,广州,510642;乌鲁木齐市农科院试验场,乌鲁木齐,830000 |
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| 基金项目： | 广东省林业局资助项目(4400-F07064,4400-F08018) |
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| 摘 要： | 研究了PEG模拟干旱胁迫环境下的火力楠(Michelia macclurel)、尾叶桉(Eucalyptus urophylla)、枫香(Liquidambar formosana)、荷木(Schima superba)幼苗的生理变化。结果表明,干旱胁迫下,4种幼苗叶片的相对含水量小于对照,其中,尾叶桉和枫香下降明显;不同干旱胁迫条件下,4种树种幼苗叶片的相对电导率均显著大于对照,其中尾叶桉和枫香上升幅度大;干旱胁迫下的火力楠和荷木幼苗叶片的脯氨酸含量呈现波动,尾叶桉和枫香幼苗则显著大于对照;不同干旱胁迫时间下的幼苗叶片的叶绿素含量小幅波动;4个树种幼苗的过氧岐化酶(SOD)活性随胁迫时间增加而呈现先升后降的趋势,其中火力楠和荷木的幼苗的SOD活性持续维持在较高水平;荷木叶片的丙二醛(MDA)含量先升后降,最后和对照水平相近,其余幼苗的MDA含量均大于对照;干旱胁迫下4种幼苗叶片的可溶性糖含量增加幅度较大。主成分分析表明,4种幼苗的抗旱能力排序为荷木>火力楠>尾叶桉>枫香。
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| 关 键 词： | 阔叶幼苗 PEG 干旱胁迫 生理指标 主成分分析 |
| 收稿时间： | 2009/11/21 0:00:00 |
| 修稿时间： | 2010/9/16 0:00:00 |
Physiological responses of four broadleaved seedlings to drought stress simulated by PEG |
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| FENG Huifang,XUE Li,REN Xiangrong,FU Jingdan,ZHENG Weiguo and SHI Xiaoling.Physiological responses of four broadleaved seedlings to drought stress simulated by PEG[J].Acta Ecologica Sinica,2011,31(2):371-382. |
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| Authors: | FENG Huifang XUE Li REN Xiangrong FU Jingdan ZHENG Weiguo and SHI Xiaoling |
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| Institution: | College of Forestry, South China Agricultural University,Guangzhou 510642,China;College of Forestry, South China Agricultural University,Guangzhou 510642,China;College of Forestry, South China Agricultural University,Guangzhou 510642,China; Synthetic Proving Ground of Xinjiang Academy of Agricultural Science,Urumqi 830000,China;College of Forestry, South China Agricultural University,Guangzhou 510642,China;College of Forestry, South China Agricultural University,Guangzhou 510642,China;College of Forestry, South China Agricultural University,Guangzhou 510642,China |
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| Abstract: | The amount and seasonality of rainfall varies strongly in South China,so that drought is a very obvious ecological factor limiting tree growth in drought season,whereas drought stress of tree species in this region has received less attention.Understanding how tree physiological characteristics respond to drought is a key element for a deeper understanding of sustainable management of forest ecosystems.Tree species with relatively high water requirements are very sensitive to periodical soil drought because... |
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| Keywords: | broadleaved seedling PEG drought stress physiological indices principal component analysis |
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