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Selection and Efficacy of Soil Bacteria Inducing Systemic Resistance Against Colletotrichum orbiculare on Cucumber
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  • Selection and Efficacy of Soil Bacteria Inducing Systemic Resistance Against Colletotrichum orbiculare on Cucumber
  • Selection and Efficacy of Soil Bacteria Inducing Systemic Resistance Against Colletotrichum orbiculare on Cucumber
저자명
Kwack. Min-Sun,Park. Seung-Gyu,Jeun. Yong-Chull,Kim. Ki-Deok
간행물명
Mycobiology
권/호정보
2002년|30권 1호|pp.31-36 (6 pages)
발행정보
한국균학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Soil bacteria were screened for the ability to control cucumber anthracnose caused by Colletotrichum orbiculare through induced systemic resistance(ISR). Sixty-four bacterial strains having in vitro antifungal activity were used for selecting ISR-inducing strains in cucumber. Cucumber seeds(cv. Baeknokdadagi) were sown in potting mixtures incorporated with the soil bacteria, at a rate of ca. $10^8$ cells per gram of the mixture. Two week-old plants were then transplanted into the steam-sterilized soil. Three leaf-stage plants were inoculated with a conidial suspension($5{ imes}10^5$ conidia/ml) of C. orbiculare. Diseased leaf area(%) and number of lesions per $cm^2$ leaf were evaluated on third leaves of the plants, $5{sim}6$ days after inoculation. Among 64 strains tested, nine strains, GC-B19, GC-B35, GK-B18, MM-B22, PK-B14, RC-B41, RC-B64, RC-B65, and RC-B77 significantly(P=0.05) reduced anthracnose disease compared to the untreated control. In contrast, some bacterial strains promoted susceptibility of cucumber to the disease. From the repeated experiments using the nine bacterial strains, GC-B19, MM-B22, PK-B14, and RC-B65 significantly(P=0.05) reduced both diseased leaf area(%) and number of lesions per $cm^2$ leaf in at lease one experiment. These strains with control efficacy of $37{sim}80%$ were determined to be effective ISR-inducing strains.