| 浮游绿藻对沉水植物苦草生长的抑制作用 |
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| 引用本文： | 黎慧娟,倪乐意.浮游绿藻对沉水植物苦草生长的抑制作用[J].湖泊科学,2007,19(2):111-117. |
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| 作者姓名： | 黎慧娟 倪乐意 |
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| 作者单位： | 1. 中国科学院南京地理与湖泊研究所,南京,210008;中国科学院研究生院,北京,100039
2. 中国科学院南京地理与湖泊研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金
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国家重点基础研究发展计划(973计划)
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中国科学院资源与生态环境研究项目
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中国科学院"百人计划"
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中国科学院所长基金 |
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| 摘 要： | 水体中氧化还原电位的变化会对藻类生长和竞争产生直接或间接的影响.本文采用单种培养和混合培养的方式,研究了在铜绿微囊藻(Microcystis aeruginosa)与斜生栅藻(Scenedesmus obliquus)竞争生长过程中氧化还原电位降低对铜绿微囊藻优势形成的影响,同时测定了铜绿微囊藻生理和形态的变化.结果表明:在单种培养条件下,铜绿微囊藻的生长速率明显高于栅藻,降低氧化还原电位对两种藻的生长速率没有影响;在混合培养条件下,两种藻的生长均受到了抑制,但降低氧化还原电位却明显提高了铜绿微囊藻的生长速率,而降低了斜生栅藻的生长速率,说明铜绿微囊藻的竞争能力得到了加强,斜生栅藻的竞争能力有所削弱;同时试验也发现在竞争生长的条件下,培养基氧化还原电位的降低诱导了铜绿微囊藻细胞体积变大,酯酶活性增强以及叶绿素荧光强度增加,这些生理参数的改变可能是铜绿微囊藻在环境中氧化还原电位降低时竞争能力得以增强的重要原因.
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| 关 键 词： | 铜绿微囊藻 斜生栅藻 混合培养 竞争 氧化还原电位 铜绿微囊藻 竞争能力 生长条件 氧化还原 电位降 响应 growth condition competition potential oxidation reduction 环境 生理参数 荧光强度 叶绿素 增强 酯酶活性 细胞体积 培养基 发现 试验 |
| 收稿时间： | 2006-04-03 |
| 修稿时间： | 2006-05-11 |
The effects of chlorophyta on the growth of submersed macrophyte Vallisneria natans:a laboratory experiment |
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| LI Huijuan and NI Leyi.The effects of chlorophyta on the growth of submersed macrophyte Vallisneria natans:a laboratory experiment[J].Journal of Lake Science,2007,19(2):111-117. |
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| Authors: | LI Huijuan and NI Leyi |
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| Institution: | State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R.China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, P.R.China and State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R.China |
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| Abstract: | In this study,the responses of Microcystis aeruginosa growth to oxidation reduction potential (ORP) re- ducing were studied by momospecies culture and mixed culture with Scenedesmus obliquus.Cell size,esterase activ- ity and chlorophyll fluorescence intensity of M.aeruginosa were measured by flow cytometry.The results showed that oxidation reduction potential of medium was reduced by exogenous glutathione (GSH).In monospecies culture groups,M.aeruginosa has a significant higher growth rate than S.obliquus,and no significant effects of ORP on the two algae were found.However,in mixed culture groups,the growth of the two algae were obviously inhibited and the cell concentration of M.aeruginosa was still dominant.While ORP was reduced,the growth rate of M. aeruginosa was enhanced and that of S.obliquus was inhibited.Furthermore,Cell size,esterase activity and chloro- phyll fluorescence intensity of M.aeruginosa were increased after ORP was changed.All these changes play an im- portant role in enhancing growth rate of M.aerugionsa. |
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| Keywords: | Microcystis aeruginosa Scenedesmus obliquus mixed culture competition oxidation reduction potential |
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