Title: Biodegradation of fenpropathrin by a novel Rhodopseudomonas sp. strain PSB07-8

Authors: Songbai Zhang; Chunhui Zhu; Yong Liu; Deyong Zhang; Xiangwen Luo; Feixue Cheng; Ju'e Cheng; Yuanhua Luo

Addresses: Branch of Longping, Graduate College, Central South University, Changsha 410125, China; Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Branch of Longping, Graduate College, Central South University, Changsha 410125, China; Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Branch of Longping, Graduate College, Central South University, Changsha 410125, China; Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Branch of Longping, Graduate College, Central South University, Changsha 410125, China; Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China ' Hunan Plant Protection Institute, Mapoling, Furong District Changsha 410125, Hunan province, China

Abstract: The aim of our study was to isolate a fenpropathrin-degrading bacterial strain and to determine its effectiveness in bioremediating fenpropathrin-contaminated soil in the laboratory. We isolated a bacterial strain from soils and named it as PSB07-8, and showed that this organism was able to degrade pyrethroid pesticide fenpropathrin. The organism was identified as a strain of Rhodopseudomonas sp. The strain PSB07-8 degraded fenpropathrin in a co-metabolic way, and the optimal condition of degradation was at temperature of 30°C and pH value of 7. Moreover, the strain PSB07-8 could effectively degrade cypermethrin and bipthenthrin, but only slightly for deltemethrin, cyfluthrin and esfenralerate. We found that the degradation rate was negatively correlated with the fenpropathrin concentration in a certain range. In addition, our soil degradation test showed that in sterilised soils with 20 mg/l or 40 mg/l fenpropathrin, the strain PSB07-8 could complete 100% or achieve 44.7% of fenpropathrin degradation in 15 days. To our best knowledge, this is the first report of a strain of genus Rhodopseudomonas with an ability of degrading fenpropathrin in soil.

Keywords: biodegradation; fenpropathrin; Rhodopseudomonas sp. PSB07-8; soil testing; bioremediation; soil contamination; pesticides; environmental pollution.

DOI: 10.1504/IJEE.2014.057833

International Journal of Environmental Engineering, 2014 Vol.6 No.1, pp.55 - 67

Received: 06 Sep 2009
Accepted: 29 Dec 2009

Published online: 11 Nov 2013 *

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