Journal
APPLIED SOIL ECOLOGY
Volume 86, Issue -, Pages 100-105Publisher
ELSEVIER
DOI: 10.1016/j.apsoil.2014.09.014
Keywords
Chlorpyrifos; Soil; Degrading microorganism; Molecular polymorphism; Microcapsules; Emulsifiable concentrate
Categories
Funding
- National High Technology R&D Program of China [2013AA102804D, 2012AA06A204]
- National Natural Science Foundation of China [21177111, 42171489]
- Key Scientific and Technological Innovation Team Program of Zhejiang Province [2010R50028]
- Zhejiang Provincial Natural Science Foundation [LZ13D010001]
- Hangzhou Science and Technology Development Item [20110232B11]
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The molecular polymorphisms of chlorpyrifos (CPF)-degrading strains in soil treated with microcapsule (MC) and emulsifiable concentrate (EC) formulations of CPF were studied by laboratory experiments. Results showed that CPF residue in MC-treated soil was maintained at a certain level during 60 days, and the residual period reached 120 days. CPF residue decreased via a first-order model with a residual period of 60 days in EC-treated soil. A total of 16 and 9 degrading strains capable of utilizing CPF as a sole source of carbon and energy were isolated from these two treatments, respectively. All degrading strains were grouped into 16 different types based on enterobacterial repetitive intergenic consensus (ERIC)-PCR pattern similarities. Strains isolated from MC- and EC-treated soils belonged to 14 and 8 ERIC-types, respectively. Six groups of strains that were isolated from MC-and EC-treated soils belonged to similar ERIC-types. All ERIC-type strains were similar to nine known species according to BLAST analysis at the NCBI website. The results indicated that the population and degradation abilities of CPF-degrading strains in soil were visibly strengthened by the controlled-release formulation of CPF compared with those by the non-controlled release formulation. (C) 2014 Elsevier B.V. All rights reserved.
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