Effects of starvation on the carbohydrate metabolism in Harmonia axyridis (Pallas)

文献类型： 外文期刊

第一作者： Shi, Zuo-Kun

作者： Shi, Zuo-Kun;Wang, Shi-Gui;Zhang, Lu;Xu, Yan-Xia;Tang, Bin;Wang, Su;Guo, Xiao-Jun;Zhang, Fan

作者机构：

关键词： Trehalase;Trehalose;Glycogen;Starvation;QRT-PCR;Harmonia axyridis

期刊名称：BIOLOGY OPEN （ 影响因子：2.422； 五年影响因子：2.647 ）

ISSN： 2046-6390

年卷期： 2017 年 6 卷 7 期

页码：

收录情况： SCI

摘要： Trehalose plays an important role in energy storage, metabolism, and protection from extreme environmental conditions in insects. Trehalose is the main blood sugar in insects, and it can be rapidly used as an energy source in times of need. To elucidate the mechanisms of the starvation response, we observed the effects of starvation on trehalose and glycogen, trehalase activity, and the relative gene expression of genes in the trehalose and glycogen metabolic pathways in the invasive beetle Harmonia axyridis. Our results show that trehalose levels and the activities of two types of trehalases decreased significantly in the first 8 h of starvation, while the relative expression of HaTreh1-1 increased. While trehalose remained nearly constant at a relatively high level from 8 to 24 h, glycogen levels decreased significantly from8 h to 24 h of starvation. Likewise, glycogen phosphorylase (HaGP) expression was significantly higher at 12 to 24 h starvation than the first 8 h, while the expression of glycogen synthase (HaGS) was relatively stable. Furthermore, trehalose decreased significantly from 24 h starvation to 72 h starvation, while trehalase activities and the relative expression of some HaTreh genes generally increased toward the end of the starvation period. The expression of trehalose-6-phosphate synthase (HaTPS) increased significantly, supporting the increase in trehalose synthesis. These results show that trehalose plays a key role in the energy provided during the starvation process through the molecular and biochemical regulation of trehalose and glycogen metabolism.

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