발효식품 추출물과 미생물을 활용한 참깨 종자전염성 병 방제

In order to control seed-borne diseases, we obtained extracts from commercial fermented food products of Kimchi, Gochujang, Doenjang, Ganjang and Makgeolli and their suppressive effects against seed-borne diseases were studied. In addition, the suppressive effects of bacterial strains isolated from the fermented foods were screened in vitro and in vivo. Among fifty food extracts, twenty food-extracts suppressed more than 92% incidence of seedling rots in vitro and seven food extracts increased 58.3-66.8% of healthy seedling in the greenhouse. Among 218 isolates from the fermented foods, 29 isolates showing high antifungal activity against seven seed-borne fungal pathogens were selected. Among 29 isolates, 13 isolates significantly reduced seedling rot and increased healthy seedlings. Sixteen isolates with high antifungal activity and suppressive effect against sesame seedling rots were identified by 16S rRNA sequencing. Fourteen of sixteen isolates were identified as Bacillus spp. and the other two isolates from Makgeolli were identified as Saccharomyces cerevisiae. It was confirmed that B. amyloliquifaciens was majority in the effective bacterial population of Korean fermented foods. In addition, when the bioformulations of the two selected effective microorganisms, B. amyloliquifacien Gcj2-1 and B. amyloliquifacien Gcj3-1, were prepared in powder forms using bentonite, kaolin, talc and zeolite, talc- and kaolin-bioformulation showed high control efficacy against sesame seed-borne disease, followed by zeolite-bioformulation. Meanwhile control efficacy of each bentonite-bioformulation of B. amyloliquifacien Gcj2-1 and B. amyloliquifacien Gcj3-1 was lower than that of bacterial suspension of them. It was found that the selected effective microorganisms from Korean fermented foods were effective for controlling seed-borne diseases of sesame in vitro and in the greenhouse. We think that Korean fermented food extracts and useful microorganisms isolated from the extract can be used as bio-control agents for suppressing sesame seed-borne diseases based on above described results. 참깨 종자전염성 병해를 방제하기 위하여 다양한 유용미생물을 함유하는 김치, 고추장, 된장, 간장, 막걸리를 채집하여 식품 추출물을 조제하고 종자전염성병원균에 대한 억제 효과를 조사하였다. 추가로 식품유래 미생물의 참깨 종자전염성 병해 억제 효과를 in vitro 및 in vivo 조건하에서 조사하였다. 50개 식품추출물에 처리한 참깨 종자를 샤레상에 처리하였을 때 20개 식품추출물이 유묘썩음증상을 92% 이상 감소시켰고, 7개 식품 추출물 처리는 온실조건에서 지상부 출현율을 58.3-66.8% 향상시키는 것으로 나타났다. 여러 발효식품으로부터 얻은 218종의 발효미생물 중 7종의 종자전염성 병원균에 대하여 높은 항균활성을 보였던 29균주를 처리하여 종자소독효과를 검정한 결과, 20균주가