期刊
PLANT PATHOLOGY JOURNAL
卷 25, 期 4, 页码 389-399出版社
KOREAN SOC PLANT PATHOLOGY
DOI: 10.5423/PPJ.2009.25.4.389
关键词
induced systemic resistance; pepper; PGPR; priming
资金
- 21C Frontier Microbial Genomics and Application Center Program, Ministry of Education, Science and Technology
- Biogreen21, Rural Development Administration, Agricultural R and D Promotion Center (ARPC)
- KRIBB initiative program, South Korea
A group of beneficial plant bacteria has been shown to increase crop growth referring to as plant growth-promoting 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 BSI 07 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 rhizo-bacterium on the expression of pepper defense genes involved in ISR.
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