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引用本文:高云霓,刘碧云,王静,贺锋,梁威,徐栋,张丽萍,吴振斌.苦草(Vallisneria spiralis)释放的酚酸类物质对铜绿微囊藻(Microcystis aeruginosa)的化感作用.湖泊科学,2011,23(5):761-766. DOI:10.18307/2011.0514
GAO Yunni,LIU Biyun,WANG Jing,HE Feng,LIANG Wei,XU Dong,ZHANG Liping,WU Zhenbin.Allelopathic effects of phenolic compounds released by Vallisneria spiralis on Microcystis aeruginosa. J. Lake Sci.2011,23(5):761-766. DOI:10.18307/2011.0514
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苦草(Vallisneria spiralis)释放的酚酸类物质对铜绿微囊藻(Microcystis aeruginosa)的化感作用
高云霓1, 刘碧云1, 王静1,2, 贺锋1, 梁威1, 徐栋1, 张丽萍1, 吴振斌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 100049
摘要:
采用广谱性固相萃取小柱富集以10g(FW)/L的密度培养三天后的苦草(Vallisneria spiralis)种植水, 不同溶剂洗脱得到的各组分对铜绿微囊藻(Microcystis aeruginosa)的生长表现出不同程度的抑制, 其中甲醇洗脱组分抑藻活性最强.去除该组分中的酚酸后, 其抑藻活性下降了22.8%, 表明酚酸参与到苦草的化感抑藻作用中.甲醇组分通过液液萃取进一步分离, 得到的乙酸乙酯组分进行GC-MS分析, 从中检测到苯甲酸、对羟基苯甲酸、对羟基苯乙酸、邻苯二甲酸、对羟基苯丙酸、香草酸、原儿茶酸、阿魏酸和咖啡酸等九种酚酸.酚酸抑藻测试的结果显示其抑藻活性与本身的结构有关, 不同酚酸以毒性效应比例多维混合表现出加和抑藻效应, 且随着混合种数的增多, 酚酸的加和效应增强.以上结果显示苦草可以释放酚酸, 抑制铜绿微囊藻的生长, 多种化感物质的联合作用可能是水生态系统中沉水植物抑制蓝藻生长的一个重要机制。
关键词:  苦草  分泌物  酚酸  铜绿微囊藻  化感作用
DOI:10.18307/2011.0514
分类号:
基金项目:国家自然科学基金项目(30870221,20877093,50808172);湖北省自然科学基金项目(2009CDB381)联合资助
Allelopathic effects of phenolic compounds released by Vallisneria spiralis on Microcystis aeruginosa
GAO Yunni1, LIU Biyun1, WANG Jing1,2, HE Feng1, LIANG Wei1, XU Dong1, ZHANG Liping1, WU Zhenbin1
1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, P.R.China;2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, P.R.China
Abstract:
Culture solutions of the submerged freshwater macrophyte Vallisneria spiralis, incubated at 10 g(FW)/L for three days, were extracted by solid phase extraction(SPE)with broad spectrum cartridges, and eluted with different solvents.The acquired fractions exerted various inhibitory effects on the growth of Microcystis aeruginosa, and the methanol-eluted fraction showed the strongest effect.After removing the phenolic compounds from the fraction, the inhibition rate was decreased by 22.8%, indicating that the phenolic compounds controlled the algal growth inhibition of V.spiralis.Moreover, the methanol-eluted fraction was further separated by liquid extraction(LLE), and the acquired ethyl acetate fraction was analyzed by gas chromatograph-mass spectrometry (GC-MS).Nine phenolic compounds were identified:benzoic acid, p-hydroxybenzoic acid, p-hydroxyphenylacetic acid, phthalic acid, 3-(4-hydroxyphenyl)propionic acid, vanillic acid, protocatechuic acid, ferulic acid and caffeic acid.The algal inhibition test showed that the antialgal effects of the phenolic compounds were influenced by their structures.The multiple phenolic com-pounds, mixed at a ratio corresponding to their single toxicity, showed additive effects in most cases, which became much obvious with the increase of phenolic classes in the mixture.These results indicate that V.spiralis could release phenolic compounds to in-hibit the growth of M.aeruginosa, and the joint action of multiple allelochemicals may be an important allelopathic factor of sub-merged macrophytes to inhibit the growth of noxious cyanobacteria in natural aquatic ecosystems.
Key words:  Vallisneria spiralis  plant exudates  phenolic compounds  Microcystis aeruginosa  allelopathy
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