氯氰菊酯降解菌的筛选鉴定及其降解特性研究

doi:CNKI:SUN:NCST.0.2009-03-014

Journal of Ecology and Rural Environment ›› 2009, Vol. 25 ›› Issue (3): 69-72.doi: CNKI:SUN:NCST.0.2009-03-014

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Isolation and Identification of a Strain of Cypermethrin-Degrading Bacteria LQ-3 and Its Degradation Characteristics

ZHANG Li-Ping, XU Lian, WU Ying, LIN Dong-Qing, LIU Xin, SHEN Biao

College of Life Science,Nanjing Agricultural University

Received:2008-12-02 Online:2009-07-25 Published:2011-04-08
Contact: SHEN Biao College of Life Science,Nanjing Agricultural University E-mail:shenbiao@njau.edu.cn

Abstract

Abstract: A strain of cypermethrin-degrading bacteria referred to as LQ-3 was isolated from sludge collected from a wastewater outlet of a pesticide plant.Based on morphological,physiological and biochemical characteristics and 16S rDNA sequences analysis(GenBank Accession No.FJ222585),LQ-3 was identified as Starkeya sp..LQ-3 degraded cypermethrin through co-metabolism.When fed with nutrient substances,such as yeast extract,peptone and glucose,LQ-3 could degrade 72.1% of cypermethrin in the medium(20 mg·L^-1) in 5 d.The optimal pH and temperature for the degradation by LQ-3 was 7-8 and 30 ℃,respectively.Strain LQ-3 was also able to degrade other pyrethroids such as cyhalothrin,fenpropathrin,bifenthrin and deltamethrin besides cypermethrin.The enzyme distribution experiment showed that the enzyme responsible for the cypermethrin degradation was extracellular.

Key words: cypermethrin, biodegradation, Starkeya sp.LQ-3, degradation character, enzyme distribution

CLC Number:

X172

ZHANG Li-Ping, XU Lian, WU Ying, LIN Dong-Qing, LIU Xin, SHEN Biao. Isolation and Identification of a Strain of Cypermethrin-Degrading Bacteria LQ-3 and Its Degradation Characteristics[J]. Journal of Ecology and Rural Environment, 2009, 25(3): 69-72.

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Isolation and Identification of a Strain of Cypermethrin-Degrading Bacteria LQ-3 and Its Degradation Characteristics

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