Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Biocontrol of Vegetables Damping-off by Bacillis ehimensis YJ-37

Bacillus ehimensis YJ-37에 의한 채소류 모잘록병의 생물학적 방제

  • Published : 2002.08.01
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Abstract

Bacillus ehimensis YJ-37 was observed as a potential biological agent to control the occurrence of diseases and plant growth.promoting rhizobacteria (PGPR). Population density of B. ehimensis YJ-37 were higher 1.2~2 times in main roots and lateral roots than from nonrhizosphere soil and persisted around 10$^4$g root on the watermelon and radish root system upto 30 days after growing in pot condition. As a PGPR, B. ehimensis YJ-37 enhanced plant growth of watermelon and radish by soil treatment. The leaf area, hypocotyl length, root length and dry weight of radish were about 85, 33, 23 and 89% more than that of untreated plant, respectively. In case of watermelon were about 63, 27, 25 and 69% more than that of untreated plant, respectively. Biocontrol of damping-off in watermelon and radish caused by Rhizoctonia solani AG-4 and Pythium ultimum were carried out in pots using 3. ehimensis YJ-37. The results showed that might contribute to it's suppression of damping-off disease in field plants.

B. ehimensis YJ-37은 생육촉진미생물이면서 모잘록병의 생물학적 방제균으로서 관찰되었다 길항균 B. ehimensis YJ-37의 무와 수박의 근권정착밀도는 인공용토에 존재하는 길항균의 평균밀도 $10^4$(cfu/g) 보다 주근과 측근에서 약 1.2~2배 이상의 증가하였다. 길항균 배양액으로 만든 토양미생물제제에 의한 무의 생육촉진은 토양미생물제제 무처리구에 비해 처리구에서 잎면적은 85% 자엽의 길이는 33% 뿌리의 길이는 23% 건조중량은 89% 촉진되었고, 수박의 경우도 무처리구에 비해 처리구에서 잎면적은 63% 자엽의 길이는 27% 뿌리의 길이는 25% 건조중량은 69% 촉진되었다. 토양미생물제제는 채소류 모잘록병균 R. solani AG-4와 P. ultimum 등의 생육을 억제하여 모잘록병을 유발시키지 못하게 하였으며, 생육촉진현상도 동시에 가져왔다.

Keywords

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