数字农科院2.0

Reduced Glutamine Synthetase Activity Alters T.he Fecundity Of Female B actrocera Dorsalis (Hendel)

文献类型： 外文期刊

作者： Zhang, Su:Yun;Zhang, Su:Yun;Smagghe, Guy;Zhang, Meng:Yi;Wang, Jin:Jun;Wei, Dong;Zhang, Ying:Xin;Zhang, Meng:Yi;Smagghe, Guy;Wang, Jin:Jun;Smagghe, Guy;Wei, Dong;Zhang, Ying:Xin

作者机构：

关键词： oriental fruit fly; glutamine synthetase; fecundity; L-methionine S-sulfoximine; vitellogenin

期刊名称： INSECTS

ISSN： 2075-4450

年卷期： 2019 年 10 卷 7 期

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摘要： Glutamine synthetase (GS) is a key enzyme in glutamine synthesis and is associated with multiple physiological processes in insects, such as embryonic development, heat shock response, and fecundity regulation. However, little is known about the influence of GS on female fecundity in the oriental fruit fly, Bactrocera dorsalis. Based on the cloning of BdGSs, mitochondrial BdGSm and cytoplasmic BdGSc, we determined their expressions in the tissues of adult B. dorsalis. BdGSm was highly expressed in the fat body, while BdGSc was highly expressed in the head and midgut. Gene silencing by RNA interference against two BdGSs isoforms suppressed target gene expression at the transcriptional level, leading to a reduced ovarian size and lower egg production. The specific inhibitor L-methionine S-sulfoximine suppressed enzyme activity, but only the gene expression of BdGSm was suppressed. A similar phenotype of delayed ovarian development occurred in the inhibitor bioassay. Significantly lower expression of vitellogenin and vitellogenin receptor was observed when GS enzyme activity was suppressed. These data illustrate the effects of two GS genes on adult fecundity by regulating vitellogenin synthesis in different ways.

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