Accelerated Degradation of Exogenous Indole by Burkholderia unamae Strain CK43B Exposed to Pyrogallol-Type Polyphenols
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概要
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In modified Winogradsky's (MW) medium supplemented with excessive indole (1), Burkholderia unamae strain CK43B isolated from polyphenol-rich Shorea rhizosphere showed almost no cell growth, but it showed drastic cell growth given further supplementation of gallic acid, a simple plant polyphenol. This active cell growth of B. unamae CK43B was due to the stimulating effect of gallic acid on 1-degradation of bacterial cells, which acquired a nitrogen source in 1. Under aerobic culture conditions with appropriate concentrations (0.5–2.0 mM) of gallic acid, B. unamae CK43B started to decompose exogenous 1 in a dose-dependent manner, and finally accumulated catechol (5) via anthranilic acid (4). Pyrogallol also showed a cometabolic effect on decarboxylation-coupled oxidative deamination of B. unamae CK43B, producing 5 from 4, as gallic acid did. These results suggest that pyrogallol-type plant polyphenols act as stimulators on B. unamae CK43B, causing it to degrade an N-heterocyclic aromatic compound (NHAC) including nitrogen-containing humic substances.
著者
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Hashidoko Yasuyuki
Division Of Applied Bioscience Graduate School Of Agriculture Hokkaido University
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Rahman Atiqur
Division Of Applied Bioscience Research Faculty Of Agriculture Hokkaido University
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Sitepu Irnayuli
Forest Microbiology Lab. Forest And Nature Conservation Res. And Dev. Center Forest Res. And Dev. Ag
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HASHIDOKO Yasuyuki
Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
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KIM Dongyeop
Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University
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