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KMID : 0545120130230091304
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Journal of Microbiology and Biotechnology
2013 Volume.23 No. 9 p.1304 ~ p.1307
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Inhibition of Microcystis aeruginosa by the Extracellular Substances from an Aeromonas sp.
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Yu-Mei Liu
Ming-Jun Chen
Meng-Hui Wang
Rui-Bao Jia
Li Li
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Abstract
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Growth of Microcystis aeruginosa could be inhibited significantly within 24 h by the extracellular substances prepared from Aeromonas sp. strain FM. During the treatment, the concentration of extracellular soluble carbohydrates increased significantly in algal culture. Morphological and ultrastructural changes in M. aeruginosa cells, including breakage of the cell surface, secretion of mucilage, and intracellular disorganization of thylakoids, were observed. HPLC-MS analysis showed that the extracellular substances of Aeromonas sp. strain FM were a mixture of free amino acids, tripeptides, and clavulanate. Among these, the algaelysis effects of lysine and clavulanate were confirmed.
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KEYWORD
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Algicidal bacteria, extracellular substances, Microcystis aeruginosa, Aeromonas
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