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Cytochrome P450 Monooxygenases CYP6AY3 and CYP6CW1 Regulate Rice Black-Streaked Dwarf Virus Replication in Laodelphax striatellus (Fallen)

文献类型： 外文期刊

作者： Zhang, Jian-Hua 1 ; Zhao, Ming 2 ; Zhou, Yi-Jun 1 ; Xu, Qiu-Fang 1 ; Yang, Yuan-Xue 2 ;

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 210014, Peoples R China

2.Shandong Acad Agr Sci, Inst Ind Crops, Jinan 250100, Peoples R China

3.Jiangsu Univ, Inst Life Sci, Zhenjiang 212013, Jiangsu, Peoples R China

关键词： insecticides; Laodelphax striatellus; rice black-streaked dwarf virus; P450s; CYP6CW1; CYP6AY3; replication

期刊名称：VIRUSES-BASEL （ 影响因子：5.048； 五年影响因子：5.127 ）

ISSN：

年卷期： 2021 年 13 卷 8 期

页码：

收录情况： SCI

摘要： The small brown planthopper, Laodelphax striatellus (Fallen), is an important agricultural pest that causes significant losses by sucking and transmitting multiple plant viruses, such as rice black-streaked dwarf virus (RBSDV). Insecticides are commonly used to control planthoppers and cause the induction or overexpression of cytochrome P450 monooxygenases (P450s) from the CYP3 and CYP4 clades after insecticide application. However, little is known about the roles of insecticides and P450s in the regulation of viral replication in insects. In this study, RBSDV-infected L. striatellus were injected with imidacloprid, deltamethrin, pymetrozine, and buprofezin, respectively. The insecticide treatments caused a significant decrease in RBSDV abundance in L. striatellus. Treatment of piperonyl butoxide (PBO), an effective inhibitor of P450s, significantly increased the RBSDV abundance in L. striatellus. Fourteen P450 candidate genes in the CYP3 clade and 21 in the CYP4 clade were systematically identified in L. striatellus, and their expression patterns were analyzed under RBSDV infection, in different tissues, and at different developmental stages. Among the thirty-five P450 genes, the expression level of CYP6CW1 was the highest, while CYP6AY3 was the lowest after RBSDV infection. Knockdown of CYP6CW1 and CYP6AY3 significantly increased the virus abundance and promoted virus replication in L. striatellus. Overall, our data reveal that CYP6CW1 and CYP6AY3 play a critical role in the regulation of virus replication in L. striatellus.

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