土壌微生物のエコ・コレクションと進化・適応(共生・寄生微生物の進化と環境適応,シンポジウム)

概要

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Recent studies on the colony formation of soil bacteria opened the way to categorize soil bacteria into colony forming curve (CFC) groups of different growth rates. A bacterial culture collection comprising organisms from every CFC group is called an ecocollection (EC). One eco-collection of a paddy soil and two eco-collections of a grassland soil were comparatively studied. Sequencing 16S rDNA base sequences of strains from the three eco-collections revealed that strains of each CFC group were diverse and showed a trend to make clusters. In the case of the paddy soil eco-collection all strains belonged to Proteobacter alpha- and beta- subdivisions and Cytophaga/Flexibacter/Bacteroides division were oligotrophic. But, in the case of the grassland soil eco-collections, only the strains of Proteobacter alpha-subdivision were collectively oligotrophic. Based on these results the organization of the soil bacterial community and its evolutionary background were discussed.
日本土壌微生物学会の論文
1997-10-01