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
作者: Tang, Bin 1 ; Qin, Zi 1 ; Shi, Zuo-Kun 2 ; Wang, Su 1 ; Guo, Xiao-Jun 1 ; Wang, Shi-Gui 2 ; Zhang, Fan 1 ;
作者机构: 1.Beijing Acad Agr & Forestry Sci, Inst Plant & Environm Protect, Beijing 100089, Peoples R China
2.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou Key Lab Anim Adaptat & Evolut, Hangzhou 310036, Zhejiang, Peoples R China
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.
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