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Abstract Title:

Binding and detoxification of chlorpyrifos by lactic acid bacteria on rice straw silage fermentation.

Abstract Source:

J Environ Sci Health B. 2016 Feb 6:1-10. Epub 2016 Feb 6. PMID: 26852781

Abstract Author(s):

Yan-Su Wang, Tian-Hao Wu, Yao Yang, Cen-Ling Zhu, Cheng-Long Ding, Chuan-Chao Dai

Article Affiliation:

Yan-Su Wang

Abstract:

This investigation examined the reduction of pesticide residues on straw inoculated with lactic acid bacteria (LAB) during ensiling. Lactobacillus casei WYS3 was isolated from rice straw that contained pesticide residues. Non-sterilized rice straw, which was inoculated with L. casei WYS3, showed increased removal of chlorpyrifos after ensiling, compared with rice straw that was not inoculated with L. casei WYS3 or sterilized rice straw. In pure culture, these strains can bind chlorpyrifos as indicated by high-performance liquid chromatography analysis. Viable L. casei WYS3 was shown to bind 33.3-42% of exogenously added chlorpyrifos. These results are similar to those of acid-treated cells but less than those of heat-treated cells, which were found to bind 32.0% and 77.2% of the added chlorpyrifos respectively. Furthermore, gas chromatography-mass spectrometry analysis determined that L. casei WYS3 detoxified chlorpyrifos via P-O-C cleavage. Real-time polymerized chain reaction analysis determined that organophosphorus hydrolase gene expression tripled after the addition of chlorpyrifos to LAB cultures, compared with the control group (without chlorpyrifos). This paper highlights the potential use of LAB starter cultures for the detoxification and removal of chlorpyrifos residues in the environment.

Study Type : Environmental, Plant Study

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