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为了获得具有抗菌活性的天然海洋生物活性物质,利用褐藻门马尾藻属的鼠尾藻(Sargassum thunbeergii Kuntze)乙醇提取物,通过对Botrytis cinerea和Penicillium expansum的抑制率来评价其抗菌活性。结果表明,鼠尾藻提取物有很强的抗果蔬病原菌活性,抑制Botrytis cinerea和Penicillium expansum生长的最小抑菌浓度(MIC)分别为16mg/mL和12mg/mL。采用10mg/mL多酚处理的草莓,其发病率和病斑直径分别比对照低28.4%和47.6%。
In order to obtain a natural marine bioactive substance having antibacterial activity, the antibacterial activity of Sargassum thunbeergii Kuntze ethanol extract was evaluated by the inhibition rate against Botrytis cinerea and Penicillium expansum. The results showed that Sargassum extract had a strong activity against pathogenic fungi, and the minimum inhibitory concentration (MIC) of 16 mg / mL and 12 mg / mL for Botrytis cinerea and Penicillium expansum respectively. Strawberry treated with 10 mg / mL polyphenol showed 28.4% and 47.6% lower incidence and lesion diameter than the control respectively.