生物技术通报 ›› 2016, Vol. 32 ›› Issue (5): 172-179.doi: 10.13560/j.cnki.biotech.bull.1985.2016.05.023

• 研究报告 • 上一篇    下一篇

噻吩磺隆降解菌Bacillus subtilis LXL-7的分离与应用

李晓楼   

  1. 四川职业技术学院建筑与环境工程系,遂宁 629000
  • 收稿日期:2015-09-14 出版日期:2016-05-25 发布日期:2016-05-27
  • 作者简介:李晓楼,男,硕士,副教授,研究方向:环境微生物及微生物应用;E-mail:3141024328@qq.com
  • 基金资助:
    四川省教育厅重点项目(13ZA0036)

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

LI Xiao-lou   

  1. Department of Architecture and Environmental Engineering Department,Sichuan Vocational and Technological College,Suining 629000
  • Received:2015-09-14 Published:2016-05-25 Online:2016-05-27

摘要: 从土壤中分离到一株能高效降解噻吩磺隆的细菌LXL-7,经鉴定LXL-7为枯草芽孢杆菌(Bacillus subtilis)。在含100 mg/L噻吩磺隆的培养基中,菌株LXL-7降解噻吩磺隆的72 h降解率可达99.6%以上。菌株LXL-7的最适pH为7.5,适宜温度为30-35℃,该菌还对噻吩磺隆和盐有很好的耐受性,至少能耐受400 mg/L的噻吩磺隆和4.0%的NaCl。另外,还通过在商品化的土壤微生物改良剂中添加菌株LXL-7开发了多功能微生物制剂,新制剂除原有功能外还增加了降解噻吩磺隆的新功能,故认为菌株LXL-7能够被用于噻吩磺隆污染的处理以及相关微生物制剂的开发。

关键词: 噻吩磺隆, 枯草芽孢杆菌, 生物降解, 微生物制剂

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