科研之友
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摘要
Some macrophytes have been reported to contain anti-cyanobacterial compounds, which can be used for nuisance cyanobacterial growth control by releasing allelochemicals. This study aimed at identifying allelochemicals of ethyl acetate extracts from Pontederia cordata L., Alternanthera philoxeroides (Mart.) Griseb., Acorus calamus L., Typha latifolia L. and to investigate their inhibitory effects on the cyanobacteria Microcystis aeruginosa Kutz. A series of analyses of ethyl acetate extracts from four aquatic plants by gas chromatograph-mass spectrometry (GC-MS) revealed that macrophytes contained fatty acids, sterol, ester, ketone, ether, alkane. Some identified compounds (hexadecanoic acid, linoleic acid, stearic acid, alpha-linolenic acid, asarone) have been reported to significantly inhibit the growth of algae. The inhibitory effect of the ethyl acetate extracts was also explored by bioassay of M. aeruginosa. Results indicated that ethyl acetate extracts from four plants inhibited to the growth of M. aeruginosa with the inhibition rate of 40.7, 30.5, 40.9 and 33.6%, respectively, when the concentration of extracts was 40.0 mg/l.
