Insight into inducing disease resistance with Allorhizobium vitis strain ARK-1, a biological control agent against grapevine crown gall disease

Akira Kawaguchi, Yoshiteru Noutoshi

Research output: Contribution to journalArticlepeer-review

Abstract

The nonpathogenic strain ARK-1 of Allorhizobium vitis has an antagonistic activity toward the tumorigenic (Ti) strain of A. vitis and works as a biocontrol agent, but the biocontrol mechanism in plants needs to be better understood. Inoculations of ARK-1 or Ti strain induced expression of marker genes for defense-related phytohormones such as salicylic acid, jasmonic acid, and ethylene in grapevine within 72 h post-inoculation (hpi). Inoculation of Ti strain 5 days after ARK-1 pre-inoculation induced expression of the marker genes except for the LOX-9 gene in a similar manner to those without the pre-inoculation, suggesting that ARK-1 did not induce typical acquired systemic resistance. However, the transcript of LOX-9 was detected at 24 and 48 hpi with Ti strain when ARK-1 was pre-inoculated, unlike the uninoculated condition. ARK-1 primed the induction of certain defense genes, and it may take part in its biocontrol activity.

Original languageEnglish
Pages (from-to)981-987
Number of pages7
JournalEuropean Journal of Plant Pathology
Volume162
Issue number4
DOIs
Publication statusPublished - Apr 2022

Keywords

  • Allorhizobium vitis
  • Biological control
  • Grapevine crown gall
  • Induced systemic resistance

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science
  • Horticulture

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