کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2009419 | 1541792 | 2013 | 6 صفحه PDF | دانلود رایگان |
• Ls.CarE1 protein was significantly overexpressed in the YN-CPF strain.
• Full-length of Ls.AChE1 was firstly cloned in L. striatellus via RACE technology.
• Mutation (Phe439His) of Ls.AChE was correlated with chlorpyrifos resistance level.
Previous studies investigating a chlorpyrifos-resistant (YN-CPF) strain indicated chlorpyrifos resistance was a result of Laodelphax striatellus carboxylesterase-1 (Ls.CarE1)-mediated detoxification and acetylcholinesterase (AChE) insensitivity. In this study, we found via immunoblotting that the protein level of Ls.CarE1 was significantly overexpressed in the YN-CPF strain compared with that observed in the chlorpyrifos-susceptible (YN) strain. Moreover, the full-length gene encoding acetylcholinesterase-1, designated Ls.AChE1, was cloned from the YN-CPF and YN strains. A sequence analysis found an amino acid mutation (Phe439His) in Ls.AChE1 (corresponding to F331 in the standard matured AChE sequence of Torpedo californica) and the mutation frequencies of Phe439His were 91%, 54% and 0% in the YN-CPF, the chlorpyrifos relaxed selection (YN-RSF) and the YN strains, respectively. The results offer new evidence that support the involvement of both AChE insensitivity and CarE metabolism in the resistance to chlorpyrifos in the YN-CPF strain.
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Journal: Pesticide Biochemistry and Physiology - Volume 106, Issues 1–2, May–June 2013, Pages 8–13