Tyrosine hydroxylase plays crucial roles in larval cuticle formation and larval-pupal tanning in the rice stem borer, Chilo suppressalis

文献类型： 外文期刊

第一作者： Xu, Qing-Yu

作者： Xu, Qing-Yu;Zhang, Zhi-Ling;Zhang, Ru;Fang, Ji-Chao;Luo, Guang Hua;Zhang, Zhi-Ling;Fang, Ji-Chao;Luo, Guang Hua;Hoffman, Ary A.

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关键词： Chilo suppressalis; Tyrosine hydroxylase; Cuticle formation; RNA interference; 3-iodo-tyrosine

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）

ISSN： 0048-3575

年卷期： 2024 年 200 卷

页码：

收录情况： SCI

摘要： The striped stem borer, Chilo suppressalis (Walker), a notorious pest infesting rice, has evolved a high level of resistance to many commonly used insecticides. In this study, we investigate whether tyrosine hydroxylase (TH), which is required for larval development and cuticle tanning in many insects, could be a potential target for the control of C. suppressalis . We identified and characterized the full-length cDNA ( CsTH ) of C. suppressalis. The complete open reading frame of CsTH (MW690914) was 1683 bp in length, encoding a protein of 560 amino acids. Within the first to the sixth larval instars, CsTH was high in the first day just after molting, and lower in the ensuing days. From the wandering stage to the adult stage, levels of CSTH began to rise and reached a peak at the pupal stage. These patterns suggested a role for the gene in larval development and larval-pupal cuticle tanning. When we injected ds CsTH or 3-iodotyrosine (3-IT) as a TH inhibitor or fed a larva diet supplemented with 3-IT, there were significant impairments in larval development and larval-pupal cuticle tanning. Adult emergence was severely impaired, and most adults died. These results suggest that CsTH might play a critical role in larval development as well as larval-pupal tanning and immunity in C. suppressalis , and this gene could form a potential novel target for pest control.

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