Trehalase in Harmonia axyridis (Coleoptera: Coccinellidae): effects on beetle locomotory activity and the correlation with trehalose metabolism under starvation conditions

文献类型： 外文期刊

第一作者： Tang, Bin

作者： Tang, Bin;Qin, Zi;Wang, Su;Guo, Xiao-Jun;Zhang, Fan;Tang, Bin;Shi, Zuo-Kun;Wang, Shi-Gui

作者机构：

关键词： Soluble trehalase;Trehalose;Short-term starvation;Locomotor activity;Harmonia axyridis

期刊名称：APPLIED ENTOMOLOGY AND ZOOLOGY （ 影响因子：1.403； 五年影响因子：1.381 ）

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收录情况： SCI

摘要： Trehalose is important in the energy metabolism of insects and protects them from extreme environmental conditions. To study the synthesis and degradation of trehalose, which is hydrolyzed to glucose by trehalase, two soluble trehalase cDNAs of the beetle Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) (HaTreh1-1 and HaTreh1-2) were cloned. The HaTreh mRNA expression levels were higher during the larval than adult stages. The locomotory behavior of the beetle and its mRNA expression of HaTreh1-1 and HaTreh1-2 under starvation were then investigated. Sprint speed and maximum moving distance were increased, and the pause frequency decreased in H. axyridis adults starved for 8 h compared with control (0 h) adults. In contrast, the mRNA expression of both HaTrehs increased quickly in adults starved from 8 to 18 h, with HaTreh1-1 in particular being expressed 289-fold in adults starved for 18 h versus control. These results show that stored food reserves can provide energy to sustain vital activities for 8 h in H. axyridis adults. However, the beetles require trehalose and other energy sources to provide energy to find food and for vital activities when starved for more than 8 h.

分类号： Q96

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