Tang J, Liu L, Hu S, Chen Y, Chen J. Improved degradation of organophosphate dichlorvos by Trichoderma atroviride transformants generated by restriction enzyme-mediated integration (REMI).
BIORESOURCE TECHNOLOGY 2009;
100:480-483. [PMID:
18585910 DOI:
10.1016/j.biortech.2008.05.022]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 05/13/2008] [Accepted: 05/16/2008] [Indexed: 05/26/2023]
Abstract
A simple technique, REMI (restriction enzyme-mediated integration), was used to construct transformants of Trichoderma atroviride with improved capability of degrading organophosphate pesticide dichlorvos. Linearized DNA of plasmid pV2 bearing the hygromycin B phosphotransferase (hph) gene was inserted into chromosomes of wild strain T23 and transformation was confirmed by PCR and Southern blot analysis, respectively. Of 247 transformants, 76% showed improved dichlorvos degradation ability as compared to the parent strain T23 based on the least significant difference (LSD) test at p=0.01. Among them, 8 transformants exhibited 30% higher in degradation rate than the parent isolate. The highest dichlorvos degradation rate of the transformants was up to 96%. This study provided an effective approach for improving organophosphate pesticide-degrading capability of T. atroviride.
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