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식물생장촉진근권세균 Bacillus subtilis YGB36을 이용한 고추 탄저병의 생물학적 방제
이용윤(Yong Yoon Lee),이연미(Younmi Lee),김영수(Young Soo Kim),김현섭(Hyun Sup Kim),전용호(Yongho Jeon) 한국식물병리학회 2020 식물병연구 Vol.26 No.1
Red pepper, one of the major economic crops in Korea, is being affected by anthracnose disease caused by Colletotrichum acutatum. To control this disease, an antagonistic bacterial strain, Bacillus subtilis YGB36 identi- fied by 16S rDNA sequencing, physiological and biochemical analyses is used as a biological control agent. In vitro screening revealed that the strain YGB36 possess strong antifungal activity against the pathogen Cylindrocarpon destructans. The strain exhibited cellulase, protease, amylase, siderophore production and phosphate solubility. In vitro conidial germination of C. acutatum was most drastically inhibited by YGB36 cell suspensions (106 cfu/ml) or culture filtrate. Development of anthracnose symptoms was reduced on de- tached immature green pepper fruits by treatment with cell suspensions, and its control value was recorded as 65.7%. The YGB36 bacterial suspension treatment enhanced the germination rate of red pepper seeds and promoted root development and growth under greenhouse conditions. The in vitro screening of fungicide and insecticide sensitivity test against YGB36 revealed that the bacterial growth was not affected by any of the insecticides, and 11 fungicides out of 21 used. Collectively, our results clearly suggest that the strain YGB36 is considered as one of the potential biocontrol agents against anthracnose disease in red pepper.
ScienceON
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