阿特拉津
生物修复
节杆菌
化学
杀虫剂
生物强化
戒毒(替代医学)
环境化学
细菌
生物
生物化学
遗传学
酶
农学
替代医学
病理
医学
作者
Duanhua Cao,Shaoming He,Xin Li,Lihong Shi,Feiyan Wang,Shaw L. Yu,Shiji Xu,Chao Ju,Hua Fang,Yunlong Yu
出处
期刊:Chemosphere
[Elsevier]
日期:2021-02-01
卷期号:264: 128514-128514
被引量:31
标识
DOI:10.1016/j.chemosphere.2020.128514
摘要
Residual injury of atrazine to the succeeding crops has been frequently reported. It is necessary to find a solution for the detoxification of atrazine contaminated soil. A high-efficient bacterial strain Arthrobacter sp. C2 for atrazine degradation was isolated in this study. The genomic information of the isolate C2, and its degradation characteristics and potential application in detoxification of atrazine contaminated soil were investigated. The results indicated that the isolate C2 genome contained 4,305,216 bp nucleotides, three plasmids, and 4705 coding genes. The degradation rates of atrazine at levels of 1, 10, 100 mg/L by the isolate C2 were 0.34, 1.94, 18.64 mg/L/d, respectively. The optimum temperature and pH for the isolate C2 to degrade atrazine were 30 °C and 7.0–9.0. Based on the metabolites detected by UPLC-TOF-MS/MS and genome annotation of the isolate C2, a common metabolic pathway of atrazine was proposed as that atrazine is firstly dechlorinated into hydroxyatrazine, and subsequently to N-isopropylammelide via dealkylation, and ultimately deaminated to cyanuric acid. Introduction of the isolate C2 into soil can enhance degradation of atrazine and thus eliminate the toxic effect of this herbicide on wheat growth. Our results indicate that the strain C2 could be a potential bioresource for bioremediation of atrazine contaminated soil.
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