Characterization of the suppressive effects of the biological control strain VAR03-1 of Rhizobium vitis on the virulence of tumorigenic R. vitis

Kirara Saito, Megumi Watanabe, Hidenori Matsui, Mikihiro Yamamoto, Yuki Ichinose, Kazuhiro Toyoda, Akira Kawaguchi, Yoshiteru Noutoshi

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Rhizobium vitis: strain VAR03-1 is a biological control agent that suppresses grapevine crown gall disease caused by a tumorigenic strain of R. vitis (Ti). Both acetosyringone-induced expression of a virulence gene and the growth of Ti were suppressed in vitro when it was cultivated in the VAR03-1 culture filtrate. These inhibitory effects were reduced by high-temperature treatment or incubation for 72 h. Both activities were detected in the high molecular weight fraction (> 100 kDa) of the filtrate. Our results suggest that the antagonistic effects of VAR03-1 on Ti are mediated by large particle(s) released in the culture media.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of General Plant Pathology
Publication statusAccepted/In press - Dec 2 2017



  • Antitumorigenic bacterial strain
  • Biological control agent
  • Crown gall disease
  • Rhizobium vitis

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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