文献类型： 外文期刊

作者： Nakai, S. ¹ ; Zou, G. ² ; Okuda, T. ³ ; Nishijima, W. ³ ; Hosomi, M. ⁴ ; Okada, M. ⁵ ;

作者机构： 1.Hiroshima Univ, Grad Sch Engn, Higashihiroshima 7398527, Japan

2.Shanghai Acad Agr Sci, Shanghai 201106, Peoples R China

3.Hiroshima Univ, Environm Res Management Ctr, Higashihiroshima 7398513, Japan

4.Tokyo Univ Agr & Technol, Inst Symbiot Sci & Technol, Koganei, Tokyo 1848588, Japan

5.Open Univ Japan, Fac Liberal Arts, Mihama Ku, Chiba 2618586, Japan

关键词： Allelopathy;Cyanobacterial growth inhibition;Fatty acid;Myriophyllum spicatum;Polyphenol

期刊名称：WATER SCIENCE AND TECHNOLOGY （ 影响因子：1.915； 五年影响因子：2.054 ）

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收录情况： SCI

摘要： Myriophyllum spicatum is known to inhibit the growth of cyanobacteria such as Microcystis aeruginosa by releasing anti-cyanobacterial allelochemicals. The allelochemicals possibly responsible for the inhibition include five polyphenols and three fatty acids, but the extent to which these are indeed responsible for the anti-cyanobacterial effects is unclear. The goal of this research was to determine the contribution of these compounds to the allelopathic effect of M. spicatum on M. aeruginosa. We first collected information on the release rates of these compounds and then added the compounds to a cyanobacterial medium on the basis of their release rates so as to simulate their excretion by M. spicatum. Addition of the polyphenols and fatty acids inhibited the growth of M. aeruginosa, and the interaction of the polyphenols and fatty acids was additive. The EC50 of a polyphenol and fatty acid mixture was compared with that of M. spicatum itself as previously determined in a mixed culture system in which M. spicatum and M. aeruginosa were incubated. The former was about 1.9 times higher than that of the latter, the implication being that the inhibitory effect of the polyphenols and fatty acids contributed about 53% of the allelopathic effect of M. spicatum. This paper is the first to describe allelochemicals that account for a half of the anti-cyanobacterial allelopathic effect of a macrophyte.