Isolation and characterization of endophytic bacteria from wild and traditionally cultivated rice varieties

Adel Elbeltagy, Kiyo Nishioka, Hisa Suzuki, Tadashi Sato, Yo Ichiro Sato, Hisao Morisaki, Hisayuki Mitsui, Kiwamu Minamisawa

研究成果: Article査読

119 被引用数 (Scopus)

抄録

Endophytic bacteria were isolated from surface-sterilized stems, seeds, and leaf sheaths of wild and traditionally cultivated rice varieties. Phylogenetic analyses based on 16S rDNA revealed a wide divergence among the isolates. However, the most frequently isolated groups were Methylobacterium sp. in the α-subdivision of Proteobacteria, and Curtobacterium sp. in the high G+ C Gram-positive group. Various phenotypic traits that are expected to be involved in the persistence and functions of the bacteria were analyzed: Most of the isolates from rice excreted pectinase, were motile, and showed an osmotic resistance to 0.6 M sucrose. These traits may be involved in endophytic characteristics in rice. About 50% of the isolates showed a cellulase activity. A few isolates fixed nitrogen, produced indole-3-acetic acid, and formed capsules. These activities were partially correlated with the phylogenetic group.

本文言語English
ページ(範囲)617-629
ページ数13
ジャーナルSoil Science and Plant Nutrition
46
3
DOI
出版ステータスPublished - 2000

ASJC Scopus subject areas

  • 土壌科学
  • 植物科学

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