Enhancement of Nitrogen-fixing Activity of Enterobacteriaceae Strains Isolated from Sago Palm (Metroxylon sagu) by Microbial Interaction with Non-nitrogen Fixers
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概要
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This study was done to determine microbial interactions between nitrogen-fixing bacteria (NFB) and different indigenous bacteria, both of which were isolated from the same samples of sago palm. Co-culture of NFB and indigenous bacteria, isolated using nutrient agar medium, into a nitrogen-free Rennie medium showed significantly higher nitrogen-fixing activity (NFA) than single inoculations of NFB did in almost all combinations. A reduced oxygen status also enhanced the NFA of NFB. All NFB preferred simple sugars as their substrates for NFA and showed extremely low levels of NFA in starch, hemicellulose, and pectin-containing media. NFA was markedly stimulated in the consortium of starch-degrading Bacillus sp. strain Bl and NFB, ranging from 0-1.5 to 150-270 nmol C_2H_4 culture^<-1> h^<-1>. The consortium of hemicellulose-degrading Agrobacterium sp. strain HMC1 or Flexibacter sp. strain HMC2 and NFB also showed enhanced NFA, ranging from 0-0.1 to 16-38 nmol. In contrast, no enhanced NFA was detected in the consortium of pectin-degrading Burkholderia sp. strain BT1 or Paenibacillus sp. strain P1 and NFB. These results may indicate that beneficial microbial interactions occur in sago palm to enhance nitrogen-fixing activity through collaborative utilizations of starch, hemicellulose and their degradation products.
- 日本微生物生態学会の論文
著者
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QUEVEDO Marcelo
Philippine Root Crop Research and Training Center, Visayas State University
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LORETO Alan
Philippine Root Crop Research and Training Center, Visayas State University
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TOYOTA KOKI
Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Tec
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Loreto Alan
Philippine Root Crop Research And Training Center Visayas State University
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Loreto Alan
Philippine Root Crop Research And Training Center Leyte State University
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Quevedo Marcelo
Philippine Root Crop Research And Training Center Visayas State University
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Quevedo Marcelo
Philippine Root Crop Research And Training Center Leyte State University
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Loreto Alan
Philippine Root Crop Research And Training Center (philrootcrops) Leyte State University
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MARISCAL Algerico
Philippine Root Crop Research and Training Center, Leyte State University
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Quevedo Marcelo
Philippine Root Crop Research And Training Center (philrootcrops) Leyte State University
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Toyota Koki
Tokyo Univ. Agriculture And Technol. Tokyo
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OKAZAKI Masanori
Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Tec
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SHRESTHA ARCHANA
Graduate school of Bio-Applications and System Engineerings, Tokyo University of Agriculture and Tec
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SUGA YUKO
National Agricultural Research Center for Western Region
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Shrestha Archana
Graduate School Of Bio-applications And System Engineerings Tokyo University Of Agriculture And Tech
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Suga Yuko
National Agricultural Res. Center For Western Region Kyoto Jpn
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Toyota Koki
Graduate School Of Bio-applications And Systems Engineering Tokyo University Agriculture And Technol
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Toyota Koki
Graduate School Of Bio-application And System Engineering Tokyo University Agriculture And Technolog
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Okazaki Masanori
Graduate School Of Bio-applications And Systems Engineering Tokyo University Of Agricultural And Tec
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Mariscal Algerico
Philippine Root Crop Research And Training Center (philrootcrops) Leyte State University
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Okazaki Masanori
Graduate School Of Bio-applications And System Engineerings Tokyo University Of Agriculture And Tech
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