Title: Study on Bichemical Characterizations of Acetylcholinesterases of the Oxya chinensis Population from Jinyuan,Shanxi
Abstract: The susceptibility of Oxya chinensis to malathion was compared between the larvaes and the adults of a field population from Jinyuan,Shanxi.Acetylcholinesterases (AChE)from the larvaes and the adults were characterized and compared.LD_(50) of the larvae(4.94 μg/g body weight)was higher 2.02 times than that of the adults(2.44 μg/g body weight);Inhibition studies of AChE indicated that adult showed 1.39, 1.34 and 1.24-fold higher susceptibility than larvae,respectively.Kinetic studies showed that the K_m and V_(max) of AChE from the larvae of the Jinyuan population were higher than those from the adult.The AChE activities in the larvae of Jinyuan population were 1.22-fold higher than that in the adult using acetylthiocholine iodide(ATC)as a substrate. We speculated that reduced sensitivity of AChE in the larvae to organophosphate inhibitions might be related to high AChE activity and the AChE activity difference between the larvae and the adult might be due to the different selective stress for Oxya chinensis in the different life stage.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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