Isolation and Characterization of Bacteria Responsible for the Suppression of Fusarium oxysporum f. sp. raphani on the Host Rhizoplane

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概要

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• Bacteria responsible for the suppression of Fusarium oxysporum f. sp. raphani on radish roots grown in so-called disease-suppressive (S) soils were isolated and characterized. About six hundred strains of bacteria, actino-mycetes, Gram-negative bacteria, fluorescent pseudomonads, and antagonistic microorganisms were isolated from the roots grown in S-soils and so-called conducive (C) soils. Isolates were selected on the basis of in vitro antibiosis to the pathogen on potato dextrose agar. Effective isolates were obtained with a relatively high frequency form the roots grown in S-soils compared with C-soils. One (MRT11) of the isolates from a S-soil, Miura soil, identified as Pseudomonas cepacia, enabled to recover the suppressiveness to the pathogen on the roots to almost the same degree as in the case of natural roots grown in S-soils when surface-sterilized roots were dipped in a suspension of the isolate. This result suggested that MRT11 was an isolate responsible for the suppression of the pathogen on roots grown in Miura soil. Roots grown in C-soils became suppressive to the pathogen when seedlings were dipped in a MRT11 culture, and MRT11 was able to survive on roots grown in both S- and C-soils.

• 社団法人日本土壌肥料学会の論文

著者

• KIMURA Makoto

  Laboratory of Structural Biology, Graduate School of Systems Life Sciences, Kyushu University

• Toyota K

  Nagoya Univ. Nagoya Jpn

• Toyota K

  Graduate School Ofbio-applications And Systems Engineering Tokyo University Of Agriculture And Techn

• Toyota Koki

  Laboratory Of Soil Biology And Chemistry School Of Agricultural Sciences Nagoya University

• Toyota Koki

  Graduate School Of Bioagricultural Sciences Nagoya University

• Toyota Koki

  Laboratory Of Soil Biology And Chemistry Graduate School Of Bioagricultural Sciences Nagoya Universi

• Yamamoto Koko

  Laboratory of Soil Biology and Chemistry, School of Agricultural Sciences, Nagoya University

• Toyota Koki

  Laboratory Of Soil Biology And Chemistry Graduate School Bioagricultural Sciences Nagoya University

• Kimura Makoto

  Laboratory Of Biochemistry Department Of Bioscience And Biotechnology Graduate School Faculty Of Agr

• Kimura Makoto

  Laboratory Of Biochemistry Department Of Agricultural Chemistry Faculty And Graduate School Of Agric

• KIMURA Makoto

  Laboratory for Remediation Research, Plant Science Center, RIKEN

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