Priming of Defense-Related Genes Confers Root-Colonizing Bacilli-Elicited Induced Systemic Resistance in Pepper

다국어 초록 (Multilingual Abstract)

A group of beneficial plant bacteria has been shown to
increase crop growth referring to as plant growthpromoting
rhizobacteria (PGPR). PGPR can decrease
plant disease directly, through the production of antagonistic
compounds, and indirectly, through the elicitation
of a plant defense response termed induced systemic
resistance (ISR). While the mechanism of PGPR-elicited
ISR has been studied extensively in the model plant
Arabidopsis, it is less well characterized in crop plants
such as pepper. In an effort to better understand the
mechanism of ISR in crop plants, we investigated the
induction of ISR by Bacillus cereus strain BS107 against
Xanthomonas axonopodis pv. vesicatoria in pepper leaves.
We focused on the priming effect of B. cereus strain
BS107 on plant defense genes as an ISR mechanism. Of
ten known pepper defense genes that were previously
reported to be involved in pathogen defense signaling,
the expression of Capsicum annum pathogenesis-protein
4 and CaPR1 was systemically primed by the application
of strain BS107 onto pepper roots confirming by quantitative-
reverse transcriptase PCR. Our results provide
novel genetic evidence of the priming effect of a rhizobacterium
on the expression of pepper defense genes
involved in ISR.

참고문헌 (Reference)

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