Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (6): 120-127.doi: 10.13560/j.cnki.biotech.bull.1985.2019-1072

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Isolation and Identification of Penicillium oxalicum SSCL-5 Degrading Cypermethrin and Its Biodegradation

CHEN Rui1,2, QU Jia1,2, SUN Xiao-yu1,2, DENG Yuan1, MEN Xin1,2, ZHAO Ling-xia1,2, SHEN Wei-rong1   

  1. 1. Microbial Resources Research Center in Shaanxi Province Institute of Microbiology,Xi’an 710032;
    2. Engineering Center of Qinling Mountains Natural Products,Shaanxi Academy of Sciences,Xi’an 710032
  • Received:2019-11-05 Online:2020-06-26 Published:2020-06-28

Abstract: To find a solution of removing pyrethroid pesticide residues in soil,enrichment and screening methods were used,and a microbial strain,which efficiently decomposed and utilized pyrethroid-like pesticides,was isolated from over 70 soil samples,and named as SSL-5. The strain grew normally in the mineral medium containing 1 000 mg/L cypermethrin. According to the results of morphology,ITS Sequencing analysis,the strain SSCL-5 was identified as Penicillium oxalicum,and tolerant to other several pyrethroid-like pesticides in high concentration. Degradation rate of cypermethrin(400 mg/L)by this SSL-5 in the mineral medium at 28℃ and 180 r/min and culturing 24 h was verified to be 97% with HPLC and UV spectrophotometry. Laboratory soil tests proved that cypermethrin in soil(400 mg/L)was degraded by 67.6% in 30 d while temperature in 20℃-34℃ and moisture content in 40%-60%.

Key words: fungi, cypermethrin, Penicillium oxalicum, biodegradation