Abstract
Rhodococcus sp. strain p52, a previously isolated dibenzofuran degrader, could effectively inhibit the growth of cyanobacteria, including species of Microcystis, Anabaena, and Nodularia. When strain p52 was inoculated at the concentration of 7.7×10(7) CFU/ml, 93.5% of exponentially growing Microcystis aeruginosa (7.3×10(6) cells/ml initially) was inhibited after 4 day. The threshold concentration for its algicidal activity against M. aeruginosa was 7.7×10(6) CFU/ml. Strain p52 exerted algicidal effect by synthesizing extracellular substances, which were identified as trans-3-indoleacrylic acid, DL-pipecolic acid, and L-pyroglutamic acid. The effective concentrations of trans-3-indoleacrylic acid and DL-pipecolic acid against M. aeruginosa were tested to be 0.5 mg/l and 5 mg/l, respectively.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Anabaena / growth & development*
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Anti-Bacterial Agents / isolation & purification
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Anti-Bacterial Agents / metabolism
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Anti-Bacterial Agents / pharmacology*
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Antibiosis*
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Benzofurans / metabolism
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DNA, Bacterial / chemistry
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DNA, Bacterial / genetics
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Indoles / isolation & purification
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Indoles / metabolism
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Indoles / pharmacology
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Microcystis / growth & development*
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Molecular Sequence Data
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Nodularia / growth & development*
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Pipecolic Acids / isolation & purification
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Pipecolic Acids / metabolism
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Pipecolic Acids / pharmacology
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Pyrrolidonecarboxylic Acid / isolation & purification
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Pyrrolidonecarboxylic Acid / metabolism
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Pyrrolidonecarboxylic Acid / pharmacology
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Rhodococcus / metabolism*
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Rhodococcus / physiology*
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Sequence Analysis, DNA
Substances
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Anti-Bacterial Agents
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Benzofurans
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DNA, Bacterial
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Indoles
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Pipecolic Acids
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indoleacrylic acid
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dibenzofuran
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pipecolic acid
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Pyrrolidonecarboxylic Acid