Streptomyces griseus Enhances Denitrification by Ralstonia pickettii K50, Which Is Possibly Mediated by Histidine Produced during Co-Culture
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概要
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Ralstonia pickettii K50 (strain K50) is a denitrifying bacterium that produces low levels of N2O under aerobic conditions. In this study, we found that co-culturing of strain K50 with Streptomyces griseus significantly enhanced the denitrification activity of strain K50 in an artificial wastewater (AWW) system. Most factors that enhance denitrification activity were in the high molecular weight fraction of the cell-free broth of S. griseus, and were suggested to be extracellular proteases. Further investigation revealed that the cultivation of strain K50 in protease-treated AWW medium fully enhanced denitrification, and that a shortage of amino acids in the medium limited it. Among the 20 standard amino acids tested, only histidine had a significant effect in inducing denitrification by strain K50. Our results indicatate that histidine is a novel inducer of bacterial denitrification.
- 社団法人 日本農芸化学会の論文
著者
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Fushinobu Shinya
Department of Biotechnology, The University of Tokyo
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WAKAGI Takayoshi
Department of Biotechnology, The University of Tokyo
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SHOUN Hirofumi
Department of Biotechnology, The University of Tokyo
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Fushinobu Shinya
Dep. Of Biotechnology Graduate School Of Agricultural And Life Sciences The Univ. Of Tokyo
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Kim Sang-Wan
Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of To
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Takaki Koki
Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of To
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MIYAHARA Morio
Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of To
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