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Resistance to cycloxaprid in Laodelphax striatellus is associated with altered expression of nicotinic acetylcholine receptor subunits

文献类型： 外文期刊

作者： Zhang, Yueliang 1 ; Han, Yangchun 1 ; Yang, Qiong 1 ; Wang, Lihua 1 ; He, Peng 2 ; Liu, Zewen; Li, Zhong; Guo, Huif 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Plant Protect, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base, Nanjing, Jiangsu, Peoples R China

2.Guizhou Univ, State Key Lab Breeding Base Green Pesticide & Agr, Key Lab Green Pesticide & Agr Bioengn, Minist Educ, Guiyang, Guizhou, Peoples

关键词： cycloxaprid;Laodelphax striatellus;resistance;nicotinic acetylcholine receptor;RNA interference

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

ISSN： 1526-498X

年卷期： 2018 年 74 卷 4 期

页码：

收录情况： SCI

摘要： BACKGROUNDCycloxaprid is a new oxabridged cis-configuration neonicotinoid insecticide, the resistance development potential and underlying resistance mechanism of which were investigated in the small brown planthopper, Laodelphax striatellus (Fallen), an important agricultural pest of rice. RESULTSA cycloxaprid-resistant strain (YN-CPD) only achieved 10-fold higher resistance, in contrast to 106-fold higher resistance to buprofezin and 332-fold higher resistance to chlorpyrifos achieved after exposure to similar selection pressure, and the cycloxaprid selected line showed no cross-resistance to the buprofezin and chlorpyrifos-selected resistance strains. Moreover, we identified 10 nicotinic acetylcholine receptor (nAChR) subunits from the transcriptome of L. striatellus, and six segments had open reading frames (ORFs). While we did not find mutations in the nAChR genes of L. striatellus, subunits Ls1 and Ls1 exhibited, respectively, 9.60-fold and 3.36-fold higher expression in the resistant strain, while Ls8 exhibited 0.44-fold lower expression. Suppression of Ls1 through ingestion of dsLs1 led to an increase in susceptibility to cycloxaprid. CONCLUSIONThe findings indicate that resistance to cycloxaprid develops slowly compared with resistance to other chemicals and without cross-resistance to chlorpyrifos or buprofezin; over-expressed Ls1 is associated with low cycloxaprid resistance levels, but the importance of over-expressed Ls1 and reduced expression of Ls8 could not be excluded. (c) 2017 Society of Chemical Industry

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