Chlorpyrifos-induced stress response in the chlorpyrifos-degrader Klebsiella sp CPK

文献类型： 外文期刊

第一作者： Wang, Shenghui

作者： Wang, Shenghui;Li, Kang;Qu, Jie;Shi, Yanhua;Yan, Yanchun;Wang, Shenghui;Zhang, Chen

作者机构：

关键词： Chlorpyrifos;Degradation;Klebsiella sp.;Stress response;(p)ppGpp

期刊名称：INTERNATIONAL BIODETERIORATION & BIODEGRADATION （ 影响因子：4.32； 五年影响因子：4.719 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： A chlorpyrifos-degrading bacterium, Klebsiella sp. CPK, which can biodegrade chlorpyrifos and transform it into 3,5,6-trichloro-2-pyridinol, was isolated by the enrichment culture technique. A classic stringent response triggered by chlorpyrifos stress was identified through the detection of (p)ppGpp accumulation in this strain. Sequence analysis of the (p)ppGpp synthetase RelA in Kiebsiella sp. CPK showed that it only had (p)ppGpp synthetase activity. Compared to its parent, the Delta relA strain was more sensitive to several stress conditions, such as high salt, low pH values and a high concentration of chlorpyrifos. In addition, growth curves and semi-quantitative RT-PCR indicated that chlorpyrifos stress affected the growth and relA expression. Together, these results indicated that chlorpyrifos could mount a stringent response in the Klebsiella sp. CPK strain, and relA expression modulated the response of the Klebsiella sp. CPK strain to chlorpyrifos stress

分类号： Q93

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