Plasmid-mediated bioaugmentation for the degradation of chlorpyrifos in soil

Journal of Hazardous Materials
Qun ZhangYunlong Yu

Abstract

To overcome the poor survival and low activity of the bacteria used for bioremediation, a plasmid-mediated bioaugmentation method was investigated, which could result in a persistent capacity for the degradation of chlorpyrifos in soil. The results indicate that the pDOC plasmid could transfer into soil bacteria, including members of the Pseudomonas and Staphylococcus genera. The soil bacteria acquired the ability to degrade chlorpyrifos within 5 days of the transfer of pDOC. The efficiency of the pDOC transfer in the soil, as measured by the chlorpyrifos degradation efficiency and the most probable number (MPN) of chlorpyrifos degraders, was influenced by the soil temperature, moisture level and type. The best performance for the transfer of pDOC was observed under conditions of 30°C and 60% water-holding capacity (WHC). The results presented in this paper show that the transfer of pDOC can enhance the degradation of chlorpyrifos in various soils, although the degradation efficiency did vary with the soil type. It may be concluded that the introduction of plasmids encoding enzymes that can degrade xenobiotics or donor strains harboring these plasmids is an alternative approach in bioaugmentation.

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Citations

Dec 12, 2012·PloS One·Shaohua ChenMeiying Hu
Apr 9, 2013·Environmental Monitoring and Assessment·António Alves SoaresCristina Delerue-Matos
Feb 3, 2016·Journal of Basic Microbiology·Razia Alam GilaniHassan Javed Chaudhary
Nov 28, 2012·Journal of Environmental Management·Zia ChishtiMuhammad Arshad
Jan 20, 2015·Journal of Environmental Sciences (China)·Chunming GaoYunlong Yu
Feb 13, 2018·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Qun ZhangXinfeng Yang
Feb 20, 2018·Frontiers in Microbiology·Hui ZhanShaohua Chen
Oct 25, 2017·Frontiers in Microbiology·Carlos GarbisuItziar Alkorta
Jul 30, 2020·The Science of the Total Environment·Cheng ZhangLusheng Zhu
Jun 22, 2021·Journal of Environmental Health Science & Engineering·Lina QiuJiandi Li
Jul 31, 2021·Journal of Hazardous Materials·Pankaj BhattShaohua Chen

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