数字农科院2.0

Isolation and Characterization of a Bensulfuron-Methyl-Degrading Strain L1 of Bacillus

文献类型： 外文期刊

作者： Lin Xiao-Yan;Wang Yi;Ding Hai-Tao;Zhao Yu-Hua;Lin Xiao-Yan;Chirko, T.

作者机构：

关键词： soil contamination;remediation;degradation rate;biochemical property;sterile soil;morphological property;physiological property

期刊名称： PEDOSPHERE

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年卷期：

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收录情况： SCI

摘要： The objectives of this study were to isolate a bensulfuron-methyl (BSM)-degrading strain of Bacillus spp. and to evaluate its effectiveness in remediation of a BSM-contaminated soil. A BSM-degrading bacterium, strain L1, was successfully isolated in this study. Strain L1 was identified as Bacillus megaterium based on its morphological, physiological, and biochemical properties, G+C content, phylogenetic similarity of 16S rDNA, and fatty acid composition. Two experiments were used to examine BSM degradation by strain L1. When BSM was used as, a sole carbon source in a mineral salt medium, the average degradation rate of BSM by strain L1 was 12.8%, which suggested that the strain was able to utilize BSM as a sole carbon and energy source. Supplement of yeast extract (200 mg L-1) significantly (P <= 0.01) accelerated the degradation of BSM by strain L1. Almost complete degradation (97.7%) of BSM could be achieved in 84 h with addition of yeast extract. In addition, in a sterile soil with 50 mg L-1 BSM, BSM degradation rate by strain L1 was 94.3% in 42 d, indicating the potential of using microbes for the remediation of BSM-contaminated soils in fields.

分类号： S15

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