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

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 gen...

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Veröffentlicht in:European journal of plant pathology 2022-04, Vol.162 (4), p.981-987
Hauptverfasser: Kawaguchi, Akira, Noutoshi, Yoshiteru
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:0929-1873
1573-8469
DOI:10.1007/s10658-021-02440-3