| 互花米草对持续淹水胁迫的生理响应 |
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| 引用本文： | 古志钦,张利权. 互花米草对持续淹水胁迫的生理响应[J]. 环境科学学报, 2009, 29(4): 876-881 |
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| 作者姓名： | 古志钦 张利权 |
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| 作者单位： | 华东师范大学河口海岸国家重点实验室,上海,200062;华东师范大学河口海岸国家重点实验室,上海,200062;华东师范大学城市生态化过程与生态恢复上海市重点实验室,上海,200062 |
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| 基金项目： | 国家科技支撑计划,上海市科委重点科技项目 |
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| 摘 要： | 对互花米草进行了40cm水深的持续淹水胁迫,研究了其生理指标的响应.结果显示,淹水胁迫下,互花米草叶片中可溶性糖含量和叶绿索含量在初期均显著低于对照,随后逐渐积累并高于对照.丙二醛含量在初期显著高于对照,随后与对照组的差异逐渐减小,至生长季末与对照水平相当.过氧化物酶活性在淹水后63d内均高于对照,至生长季末则低于对照,而超氧化物歧化酶活性则始终高于对照.至生长季末,持续淹水胁迫条件下的互花米草生物量低于对照,其形态学上表现为植株矮小、根系变短、节长变短、地下部分所占生物量比重降低.研究结果表明,持续淹水胁迫对互花米草的生理指标产生影响,但互花米草可以通过生理和形态学的响应来适应这种胁迫,因此,必须进一步结合其它物理控制措施进行综合治理.
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| 关 键 词： | 外来入侵物种 互花米草 持续淹水 生长指标 生理指标 |
| 收稿时间： | 2008-09-03 |
| 修稿时间： | 2008-10-22 |
Physiological responses of Spartina alterniflora to long-term waterlogging stress |
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| GU Zhiqin and ZHANG Liquan. Physiological responses of Spartina alterniflora to long-term waterlogging stress[J]. Acta Scientiae Circumstantiae, 2009, 29(4): 876-881 |
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| Authors: | GU Zhiqin and ZHANG Liquan |
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| Affiliation: | GU Zhiqin1,ZHANG Liquan1,2,1.State Key Laboratory of Estuarine , Coastal Research,East China Normal University,Shanghai 200062 2.Shanghai Key Laboratory of Urbanization Ecological Process , Ecological Restoration,Shanghai 200062 |
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| Abstract: | Effects of waterlogging stress on the physiological and growth responses of Spartina alterniflora and its adaptation mechanisms under long-term waterlogging conditions were studied.The results showed that the contents of soluble sugar and chlorophyll in leaves were lower than those of the control at the beginning of the experiment and then accumulated gradually.The contents of MDA increased remarkably at the beginning and then decreased.The activities of SOD and POD increased at the beginning and decreased ... |
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| Keywords: | exotic and invasive species Spartina alterniflora waterlogging physiological index growth index |
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