| 3种观赏草在自然失水胁迫下的生理变化与耐旱性关系 |
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| 引用本文： | 张智,夏宜平,常乐,孙晓杰.3种观赏草在自然失水胁迫下的生理变化与耐旱性关系[J].东北林业大学学报,2007,35(12):17-20. |
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| 作者姓名： | 张智 夏宜平 常乐 孙晓杰 |
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| 作者单位： | 1. 浙江省农业科学院花卉研究开发中心
2. 浙江大学,杭州,310029 |
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| 摘 要： | 对斑叶芒(Miscanthus sinensis variegatus)、狼尾草(Pennisetum alopecuroides)、矮蒲苇(Cortaderia selloa-napumila)3种观赏草在干旱胁迫下的形态与生理变化进行研究,在为期19d的自然失水胁迫处理下,研究结果表明:随着干旱胁迫时间的延长,3种观赏草的游离脯氨酸、膜透性、丙二醛(MDA)的量不断增加,与枯叶率的增加呈显著正相关;斑叶芒和狼尾草叶片的SOD活性在干旱胁迫后期明显高于矮蒲苇;比较形态和生理指标后,认为狼尾草的耐旱性最强,斑叶芒次之,矮蒲苇对于干旱最敏感。
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| 关 键 词： | 观赏草 耐旱性 枯叶率 游离脯氨酸 丙二醛(MDA) 电解质外渗率(REC) |
| 修稿时间： | 2007-02-11 |
Relationship between Physiological Changes and Drought Tolerance in Three Species of Ornamental Grasses under Drought Stress |
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| Zhang Zhi,Xia Yiping,Chang Le,Sun Xiaojie.Relationship between Physiological Changes and Drought Tolerance in Three Species of Ornamental Grasses under Drought Stress[J].Journal of Northeast Forestry University,2007,35(12):17-20. |
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| Authors: | Zhang Zhi Xia Yiping Chang Le Sun Xiaojie |
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| Institution: | Department of Horticulture, College of Agriculture and Biotechno/ogy, Zhe- jiang University, Hangzhou 310029, P. R. China;12 |
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| Abstract: | An experiment was conducted to study the morphological and physiological changes in three species of ornamental grasses, zebra grass(Miscanthus sinensis), fountain grass(Pennisetum alopecuroides) and pampas grass(Cortaderia selloana)under drought stress. Result shows that the proline content, relative electrical conductivity and malondialdehyde (MDA) content of the three grass species exposed to drought stress for 19 days increase continuously with the prolonging of drought stress, exhibiting an obviously positive correlation with increasing percentage of withered leaves. The SOD activities in zebra grass and fountain grass are remarkably higher than that in pampas grass at the late stage of drought treatment. Fountain grass has the highest drought tolerance, and then followed by zebra grass and pampas grass in order in terms of their morphological and physiological indexes. |
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| Keywords: | Ornamental grass Drought tolerance Percentage of withered leaves Free proline MDA Relative electrical conductivity |
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