Silencing of Cytochrome P450 in Spodoptera frugiperda (Lepidoptera: Noctuidae) by RNA Interference Enhances Susceptibility to Chlorantraniliprole | Zendy

Baizhong Zhang | Zendy; Xu Su | Zendy; Congai Zhen | Zendy; Liuyang Lu | Zendy; YaShe Li | Zendy; Xing Ge | Zendy; Dongmei Chen | Zendy; Pei Zhang | Zendy; Ming-Wang Shi | Zendy; Xiling Chen | Zendy

Open Access

Silencing of Cytochrome P450 in Spodoptera frugiperda (Lepidoptera: Noctuidae) by RNA Interference Enhances Susceptibility to Chlorantraniliprole

Author(s) -

Baizhong Zhang,

Xu Su,

Congai Zhen,

Liuyang Lu,

YaShe Li,

Xing Ge,

Dongmei Chen,

Pei Zhang,

Ming-Wang Shi,

Xiling Chen

Publication year - 2020

Publication title -

journal of insect science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.551

H-Index - 49

ISSN - 1536-2442

DOI - 10.1093/jisesa/ieaa047

Subject(s) - biology , spodoptera , noctuidae , rna interference , fall armyworm , monooxygenase , lepidoptera genitalia , cytochrome p450 , larva , instar , rna silencing , gene silencing , toxicology , botany , gene , rna , genetics , enzyme , biochemistry , recombinant dna

Fall armyworm, Spodoptera frugiperda (Smith), has caused significant losses for crop production in China. The fall armyworm is mainly controlled by the chemical insecticides, whereas the frequent application of insecticides would result in the resistance development. Insect cytochrome P450 monooxygenases play an essential part in the detoxification of insecticides. In this study, five P450 genes were selected to determine the role in response to insecticides by RNA interference (RNAi). Developmental expression pattern analysis revealed that S. frugiperda CYP321A8, CYP321A9, and CYP321B1 were highest in second-instar larvae among developmental stages, with 2.04-, 3.39-, and 8.58-fold compared with eggs, whereas CYP337B5 and CYP6AE44 were highest in adult stage, with 16.3- and 10.6-fold in comparison of eggs, respectively. Tissue-specific expression pattern analysis exhibited that CYP321A8, CYP321B1, and CYP6AE44 were highest in the midguts, with 3.56-, 3.33-, and 3.04-fold compared with heads, whereas CYP321A9 and CYP337B5 were highest in wings, with 3.07- and 3.36-fold compared with heads, respectively. RNAi was also conducted to explore detoxification effects of the five P450 genes on chlorantraniliprole. The second-instar larvae became more sensitive to chlorantraniliprole with a higher mortality rate than the control, after silencing CYP321A8, CYP321A9, and CYP321B1, respectively. These findings strongly supported our viewpoint that CYP321A8, CYP321A9, and CYP321B1 may play a critical role in insecticide detoxification. It will provide a basis for further study on regulation of P450 genes and the management of S. frugiperda.

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