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KMID : 1234420120400020135
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Korean Journal of Microbiololgy and Biotechnology
2012 Volume.40 No. 2 p.135 ~ p.143
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Induced of Systemic Resistance against Gray Leaf Spot in Pepper by Enterobacter Species Isolated from Family Gramineae Plants in Dok-do
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Son Jin-Soo
Marilyn Sumayo
Kang Hyun-Uk
Kim Sa-Youl
Kim Byung-Soo
Kwon Duck-Kee
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Abstract
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This study’s aim is to isolate and characterize plant growth promoting Enterobacter species for the biological control of gray leaf spot in pepper. Screening was carried out from the rhizosphere of Agropyron tsukushiensi var. transiens (Hack.) Ohwi in Dok-do. Rhizobacterial isolates were partially identified by 16S rDNA sequencing and Enterobacter species were tested for plant growth promoting capabilities and the induction of systemic resistance in pepper against gray leaf spot caused by Stemphylium solani. Isolates were tested for production of indole-acetic acid and siderophore, and for phosphate solubilization. The application of isolates was effective in controlling gray leaf spot in pepper with E. asburiae (KNUC5007) and E. cancerogenes (KNUC5008 and KNUC5010) having the highest efficacy in reducing gray leaf spot severity. This is the first report of the biological control of gray leaf spot in pepper using rhizobacteria and it is hoped that this study will increase the utilization of Enterobacter species as plant growth promoters and biocontrol agents.
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KEYWORD
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gray leaf spot, dok-do, Enterobacter spp., induced systemic resistance, Stemphylium solani
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