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引用本文:张婷,宋立荣.铜绿微囊藻(Microcystis aeruginosa)与三种丝状蓝藻间的相互作用.湖泊科学,2006,18(2):150-156. DOI:10.18307/2006.0208
ZHANG Ting,SONG Lirong.Allelopathic effect between Microcystis aeruginosa and three filamentous cyanobacteria. J. Lake Sci.2006,18(2):150-156. DOI:10.18307/2006.0208
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铜绿微囊藻(Microcystis aeruginosa)与三种丝状蓝藻间的相互作用
张婷1,2, 宋立荣1
1.中国科学院水生生物研究所淡水生态与生物技术国家重点实验室 武汉 430072;2.中国科学院研究生院 北京 100039
摘要:
研究了单细胞铜绿微囊藻和三种丝状蓝藻(水华束丝藻、水华鱼腥藻及土生席藻)间的相互作用,包括以下两个方面的内容:①铜绿微囊藻细胞滤出液对水华束丝藻、水华鱼腥藻及土生席藻生长的影响;②水华束丝藻、水华鱼腥藻及土生席藻细胞滤出液对铜绿微囊藻生长的影响.研究发现,当滤出液浓度为60%(滤出液与BG11的体积比为3:2)时,制绿微囊藻细胞滤出液对水华束丝藻、水华鱼腥藻的生长有显著促进效果,尤其对水华束丝藻的作用更加明屁;对土生席藻的生长却起着微弱的抑制作用,仅表现于100%细胞滤出液中,对铜绿微囊藻而言,土生席藻细胞滤出液对其的生长起着显著抑制作用,浓度越高、抑制作用越强;而水华束丝藻、水华鱼腥藻仅在100%细胞滤出液中才表现出微弱的抑制作用.为验证营养盐浓度差异是否影响滤出液的作用效果,进行了无机营养盐(NO3-N、NH4+-N、PO4-P)干扰的消除试验.结果表明,无机营养盐(NO3-N、NH4+-N、PO4-P)的改变并不影响滤出液的作用效果,从而我们推测水华蓝藻之间存在着化感作用.本研究为解释自然水体中藻类种群演替的原因,深入认识水华蓝藻的动力学机制提供了新的实验证据.
关键词:  化感作用  铜绿微囊藻  水华束丝藻  水华鱼腥藻  土生席藻
DOI:10.18307/2006.0208
分类号:
基金项目:中国科学院知识创新工程重要方向性项目(KSCX2-1-10);国家重点基础研究发展规划项目(2002CB412306)资助
Allelopathic effect between Microcystis aeruginosa and three filamentous cyanobacteria
ZHANG Ting1,2, SONG Lirong1
1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072,P. R. China;2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, P. R. China
Abstract:
Allelopathy, the release of extracellular compounds that have an effect on the growth of other microorganisms, may be one factor contributing to formation and/or maintenance of cyanobacterial blooms. In this paper, the allelopathic effect between single-cell Microcystis aeruginosct and three filamentous cyanobacteria助hanizomerznn flos-uquae, Anabaena flos-aqtuae, Phormidium mucicolu was investigated. The experiment was conducted to find out the allelopathic effects of cell-free filtrate on the growth of different target organisms; 1.the cell-free filtrate of M.uPruginnsa on Aphunizomenorz flos-aquue, Arzubaerz.a fins-aquae and P. mucicola;2. the cell-free filtrate of Aphurztzomenon flos-uquae, Arzabuena flos-aquae and P. mucicola on M. aeruginosu. The results demonstrated that M.ueruginosu could accelerate the growth of Aphanizontenorz flo.s-rzquae and Anahrzerza flos-uquae, and slightly inhibited P. ntucicola. On the other hand, the growth of M, deruginostx was slightly suppressed by Aphurzizumenorz fins-aquue and.4rzabaena flo.s-aquae, but heavily inhibited by P. mucicolu. The inhibition by P. ntucicolu was enhanced with thf; increase of concentration of cell-free filtrate. Furthermore, the allelopathic effect between single-cell M. uerugino.su and three filamentons cyanobacteria.9phurzizurrzertnn flos-uquoe, Atwbaena floc-aquue, P. mucicolu was not influenced by the change of the concentration of inorganic nutrients in cell-free filtrates. It suggests that the inter-speties competition existed in cyanobacteria. The present study is implicated in illustrating dynamics of the cyanobacserial bloom.
Key words:  Allelopathy  Microcystis aeruginosa  Aphanizomenon flos-aquae  Anabaena flos-aquae  Phormidium mucicola
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