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Isolation and Characterization of the Pymetrozine-Degrading Strain Pseudomonas sp. BYT-1

文献类型： 外文期刊

作者： Sun, Gaojie 1 ; Zhang, Mingliang 1 ; Liu, Xiaoan 1 ; Gao, Qinqin 1 ; Jiang, Wankui 1 ; Zhou, Yidong 1 ; Wang, Hui 1 ; Cui 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Life Sci, Key Lab Microbiol Agr Environm, Minist Agr, Nanjing 210095, Jiangsu, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Jiangsu Key Lab Food Qual & Safety, State Key Lab Cultivat Base, Nanjing 210014, Jiangsu, Peoples R China

关键词： pymetrozine; Pseudomonas sp. BYT-1; degradation; oxidative hydrolysis

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2019 年 67 卷 15 期

页码：

收录情况： SCI

摘要： In this study, we isolated and characterized the bacterial strain Pseudomonas sp. BYT-1, which is capable of degrading pymetrozine and using it as the sole carbon source for growth. Strain BYT-1 could degrade 2.30 mM pymetrozine within 20 h under the optimal conditions of 30 degrees C and pH 7.0. Investigation of the degradation pathway showed that pymetrozine was oxidatively hydrolyzed to 4-amino-6-methyl-4,5-dihydro-2H-[1,2,4]triazin-3-one (AMDT) and nicotinic acid (NA). The former accumulates as the end product in the culture, whereas the latter was hydroxylated to 6-hydroxynicotinic acid (6HNA) and subjected to further degradation. The transformation of pymetrozine to AMDT and NA by the cell-free extracts of strain BYT-1 also supported that the oxidative hydrolysis of the C=N double bond in pymetrozine was the initial degradation step. This is the first report on a pure bacterial culture with the ability to degrade pymetrozine. These findings enhance our understanding of the microbial degradation mechanism of pymetrozine.

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