Allelopathic inhibition on red tide microalgae Skeletonema costatum by five macroalgal extracts

查看全文 作　　者：Zhen [1]AN;Zhenyu [1]WANG;Fengmin [1]LI;Zhijia [1]TIAN;Hongying [2]HU

机构地区：[1]Key Laboratory of Marine Environmental Science and Ecology of Ministry of Education,College of Environmental Science and Engineering,Ocean University of China,Qingdao 266003,China;[2]State Key Joint Laboratory of Environmental Simulation and Pollution Control,Department of Environmental Science and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Environmental Science & Engineering》索引2008年第2卷第3期,共9页

摘　　要：This study aims to identify effective antialgal allelochemicals from marine macroalgae that inhibit the growth of red tide microalgae.Practically,new algicidal agents were developed to control red tide.The growth inhibitory effects of 5 marine macroalgae Porphyra tenera,Laminaria japonica,Ulva pertusa,Enteromorpha clathrata,and Undaria pinnatifida on Skeletonema costatum were evaluated by adding crude seawater extracts of macroalgal dry tissue into the culture medium containing S.costatum.The half-effective concentrations at 120 h(EC_(50),120 h)of the seawater extracts were 0.6,0.9,1.0,1.0,and 4.7 g/L for the five macroalgae above,respectively.E.clathrata,L.japonica and U.pertusa showed strong allelopathic effect on the growth of S.costatum.There have been no previous reports with regard to the allelopathic effects of the former two macroalgae so far.The possible allelochemicals of 21 compounds of the E.clathrata were detected using Gas chromatography-mass spectrometry(GC-MS)analysis.Unsaturated fatty acids,acrylic acid(C_(3)H_(4)O_(2)),and linolenic acid(C_(18)H_(30)O_(2))were the most likely allelochemicals in E.clathrata. 关键词：algae bloom ALLELOPATHY EXTRACT inhibitory effect MACROALGAE marine ecology Skeletonema costatum

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Allelopathic inhibition on red tide microalgae Skeletonema costatum by five macroalgal extracts

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