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大型海藻内共生真菌次生代谢产物中抑制水华蓝藻物质的分离与活性

DOI: 10.11913/PSJ.2095-0837.2014.50509, PP. 509-516

Keywords: 内共生真菌,抑藻物质,水华鱼腥藻,铜绿微囊藻,化感作用

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Abstract:

?为获得能明显抑制水华蓝藻的化感物质,本研究从28株大型海藻内共生真菌中筛选出了4株菌株,其粗提物能显著抑制水华鱼腥藻(Anabaenaflos-aquae)和铜绿微囊藻(Microcystisaeruginosa)的生长。对这4株真菌扩大培养后,检测了从其次生代谢产物中分离出的32种单体化合物的抑藻活性。其中,化合物sterigmatocystin、(2'E,4'E,6'E)-6-(1'-carboxyocta-2',4',6'-triene)-11,12-epoxy-9,11-dihydroxydrim-7-ene、6,8-di-O-methylnidurufin和aversin对水华鱼腥藻的抑制率显著大于50%(P<0.05),24h半数有效浓度(EC50,24h)分别为6.865、4.302、1.824、2.319μg/mL;化合物sterigmatocystin、indol-3-carboxaldehyde和(2'E,4'E,6'E)-6-(1'-carboxyocta-2',4',6'-triene)-11,12-epoxy-9,11-dihydroxydrim-7-ene对铜绿微囊藻的抑制率显著大于50%(P<0.05),EC50,24h分别为4.167、5.374、8.386μg/mL。

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