Isolation and Utilization of a Thifensulfuron-methyl-degrading Bacterium，Bacillus subtilis LXL-7

doi:10.13560/j.cnki.biotech.bull.1985.2016.05.023

Abstract

Abstract: A strain LXL-7 isolated from soil highly degrades thifensulfuron-methyl，and was identified as Bacillus subtilis. The degradation rate by LXL-7 reached 99.6% in mineral salt medium of thifensulfuron-methyl（100 mg/L）after 72 h. The optimal pH value and temperature were 7.5 and 30-35℃. The strain tolerated well to thifensulfuron-methyl and salt，at least to 400 mg/L of thifensulfuron-methyl and 4.0% NaCl. In addition，adding strain LXL-7 in the commercial preparation for soil amendment，a new multiple-function microbial preparation was developed，and it had an additional new function of degrading thifensulfuron-methyl residue in soil except original functions. Therefore，the strain LXL-7 could be considered for bioremediation of thifensulfuron-methyl pollution and development of microbial preparation.

Key words: thifensulfuron-methyl, Bacillus subtilis, biodegradation, microbial preparation

LI Xiao-lou. Isolation and Utilization of a Thifensulfuron-methyl-degrading Bacterium，Bacillus subtilis LXL-7[J]. Biotechnology Bulletin, 2016, 32(5): 172-179.

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