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토양 분리 균주 Bacillus Velezensis HY-3479와 Paenibacillus polymyxa HSWM의 벤지미다졸계 살진균제 카벤다짐의 생물학적 분해
송수영 ( Suyoung Song ),박소현 ( Sohyun Park ),진예원 ( Yewon Jin ),황철원 ( Cher-won Hwang ) 한국환경농학회 2022 한국환경농학회 학술대회집 Vol.2022 No.-
Carbendazim is a fungicide of benzimidazole group which is widely used in the agriculture of pepper, ginseng and many other crops. Carbendazim has greatly increased the agricultural production in the last few decades but it cannot be degraded naturally in soil. To remove the remnant pesticide in polluted environment, many rhizobacteria are used as biodegradation agent. Few bacterial strains isolated from soil were found to be capable of degrading carbendazim. Isolates were selected from the soil dwelling rhizobacteria based on the ability of using carbendazim as carbon and nitrogen source in M9 minimal medium. The identification of the Carbendazim-degrading bacteria was analyzed by 16S rRNA gene sequencing and the strains were identified and designated as Bacillus velezensis HY-3479 and Paenibacillus polymyxa HSWM. Strain HSWM showed the best carbendazim enduring activity at in vitro pesticide agar test. Both strains had significantly higher degradation rate compared to control strain Bacillus subtilis KACC 15590 in HPLC analysis and Bacillus velezensis HY-3479 had the best degradation rate of 76.99%. In gene expression analysis, upregulation of carbendazim degrading genes (mheI, hdx) was observed for both HY-3479 and HSWM strains. Biodegrading activity of isolated strains may be developed as useful means for bioremediation and used as potential microbial agent in sustainable agriculture.