Bioremediation using Novosphingobium strain DY4 for 2,4-dichlorophenoxyacetic acid-contaminated soil and impact on microbial community structure

Biodegradation
Yu DaiShuguang Xie

Abstract

The herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) is commonly used for weed control. The ubiquity of 2,4-D has gained increasing environmental concerns. Biodegradation is an attractive way to clean up 2,4-D in contaminated soil. However, information on the bioaugmentation trial for remediating contaminated soil is still very limited. The impact of bioaugmentation using 2,4-D-degraders on soil microbial community remains unknown. The present study investigated the bioremediation potential of a novel degrader (strain DY4) for heavily 2,4-D-polluted soil and its bioaugmentation impact on microbial community structure. The strain DY4 was classified as a Novosphingobium species within class Alphaproteobacteria and harbored 2,4-D-degrading TfdAα gene. More than 50 and 95 % of the herbicide could be dissipated in bioaugmented soil (amended with 200 mg/kg 2,4-D) respectively in 3-4 and 5-7 days after inoculation of Novosphingobium strain DY4. A significant growth of the strain DY4 was observed in bioaugmented soil with the biodegradation of 2,4-D. Moreover, herbicide application significantly altered soil bacterial community structure but bioaumentation using the strain DY4 showed a relatively weak impact.

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Citations

Jul 25, 2015·Antonie van Leeuwenhoek·Hina SinghTae-Hoo Yi
May 6, 2016·Artificial Cells, Nanomedicine, and Biotechnology·Juan DuTae-Hoo Yi
Apr 25, 2017·Journal of Agricultural and Food Chemistry·Xiangwei WuRimao Hua
Feb 15, 2018·Environmental Science and Pollution Research International·Víctor Castro-GutiérrezCarlos E Rodríguez-Rodríguez
Jul 8, 2018·Environmental Science and Pollution Research International·Yong-Chao GaoRavi Naidu
Feb 6, 2020·Environmental Microbiology·Olukayode KuloyoMarc Strous
Jan 15, 2016·Environmental Science and Pollution Research International·Xiaobin LiaoBaoling Yuan

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