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벤지미다졸계 살균제 베노밀과 카벤다짐을 분해하는 Rhodococcus sp. 균주들의 분리 및 특성 분석
이재철(Jae-Cheol Lee),전유나(Yu-Na Jeon),정명화(Myoung-Hwa Jung),김유진(Yu-Jin Kim),박인철(InCheol Park),유재홍(Jaehong You),이창묵(Chang-Muk Lee),한병학(Byeong-Hak Han),안시현(Si-Hyun An),안재형(Jae-Hyung Ahn) 한국농약과학회 2020 농약과학회지 Vol.24 No.2
To reduce the harmful effects of two benzimidazole fungicides, benomyl and carbendazim, we isolated two bacterial strains degrading the fungicides via enrichment culturing procedure. The rep-PCR band patterns and 16S rRNA gene sequence analysis identified the strains as Rhodococcus sp. 3-2 and Rhodococcus sp. 6-2. The two bacterial strains degraded 75 ㎎/L of benomyl and 235 ㎎/L of carbendazim in the minimum salt medium by more than 96% within 60 hr through an unknown metabolite. The soil application experiment demonstrated that strain 3-2 decreased 30 mg of benomyl and carbendazim/㎏ by 78-82% within 10 days compared with 25-32% in the uninoculated control soils. The fungal spore germination test was also conducted using Penicillium roqueforti to evaluate the toxicity of the degradation products of benomyl and carbendazim by the strains, which showed that the two bacterial strains completely detoxify the fungicides. These results shows that strains 3-2 and 6-2 can be utilized for the detoxification of soils contaminated with residual benomyl and carbendazim.
미생물제(Sphingobium sp. Cam5-1) 처리에 따른 토양 중 카두사포스의 분해효과
연제형 ( Jehyeong Yeon ),정준휘 ( Joon-hui Chung ),최한석 ( Han Suk Choi ),고영준 ( Young-joon Ko ),김다연 ( Dayeon Kim ),안시현 ( Sihyun An ),안재형 ( Jae-hyung Ahn ),한귀환 ( Gui Hwan Han ),원항연 ( Hang-yeon Weon ) 한국환경농학회 2023 한국환경농학회지 Vol.42 No.4
Cadusafos, an organophosphorus insecticide, has been commonly used against various pests worldwide. Organophosphorus pesticides have shorter half-lives and lower toxicities than organochlorine pesticides. However, excessive use of Cadusafos can increase pest resistance and issues with acetylcholine biomagnification, potentially resulting in human toxicity. In this study, we investigated the effect of a Cadusafos-degrading microbial agent (CDMA) prepared using Sphingobium sp. Cam5-1, which was previously reported to effectively degrade residual Cadusafos in soil. Experiments were conducted under both controlled laboratory and greenhouse field conditions. Under laboratory conditions, CDMA (10<sup>6</sup> cfu/g soil application rate) decomposed 97% of Cadusafos in the soil in the untreated control after 21 days. Additionally, when CDMA (10<sup>6</sup> cfu/g soil) was mixed with quicklime, 99% of Cadusafos was decomposed within 3 days. Under greenhouse field conditions, the combined effect of CDMA (10<sup>6</sup> cfu/g soil) and quicklime was not observed. However, CDMA (10<sup>6</sup> cfu/g soil) application alone was capable of decompos- ing 91% of Cadusafos after 3 days. These results indicate that CDMA can effectively decompose high residual levels of Cadusafos in soils under field conditions using a low inoculum rate.