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language
eng
Author
Kuranaga, Chika
Yamamoto, Akihiro
Sameshima-Saito, Reiko
Saeki, Yuichi
Description
In order to assess the physiological responses of bradyrhizobia and competition for the nodulation of soybean at different temperatures, we investigated the expression of the nodC gene at 20, 25, and 30°C and the abilities of bacteria to nodulate soybean in microcosms at day/night cultivation temperatures of 23/18°C, 28/23°C, and 33/28°C for 16/8 h. We tested five Bradyrhizobium USDA strains: B. diazoefficiens USDA 110^T and 122, B. japonicum USDA 123, and B. elkanii USDA 31 and 76^T. The expression of nodC was up-regulated by increasing culture temperatures in USDA 110^T, 122, 31, and 76^T, but was down-regulated in USDA 123. The proportions of USDA 110^T and 122 within the community were the greatest at 28/23°C. The population of USDA 31 increased, whereas that of USDA 123 decreased with increasing cultivation temperatures. On the other hand, infection by USDA 76^T was not detected, and low numbers of USDA 76^T nodules confirmed its poor nodulation ability. These results indicate that the competitiveness of and infection by USDA 110^T, 122, 123, and 31 for soybean nodulation depend on cultivation temperatures, and suggest that the temperature dependence of nodC expression affects the bradyrhizobial community structure.
Subject
bradyrhizobia
nodC gene
temperature
community structure
Journal Title
Microbes and Environments
Volume
31
Issue
1
Start Page
27
End Page
32
ISSN
13426311
Published Date
2016-02-13
DOI
PubMed ID
NCID
AA11551577
Publisher
日本微生物生態学会
日本土壌微生物学会
Publisher Aalternative
Japanese Society of Microbial Ecology
Japanese Society of Soil Microbiology
NII Type
Journal Article
Format
PDF
Resource URL(IsVersionOf)
https://www.jstage.jst.go.jp/article/jsme2/31/1/31_ME15114/_article
Rights
Copyright © 2016 by Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions.
本文データは学協会の許諾に基づきJ-STAGEから複製したものである
Text Version
出版社版
Gyoseki ID
e29872
OAI-PMH Set
Department of Agricultural and Forest Sciences, Faculty of Life and Environmental Science
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