Effects of high temperature on the growth performance and midgut autophagy of thermotolerant and thermosensitive silkworm strains

文献类型： 外文期刊

第一作者： Guo, Huiduo

作者： Guo, Huiduo;Ling, Mingfa;Yang, Runhuan;Gui, Tao;Li, Gang;Zhao, Guodong;Qian, Heying;Wang, Wenbin;Qian, Heying

作者机构：

关键词： autophagy; high temperature stress; silkworm; thermotolerance

期刊名称：ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：1.5； 五年影响因子：2.0 ）

ISSN： 0739-4462

年卷期： 2024 年 116 卷 4 期

页码：

收录情况： SCI

摘要： High temperature stress has long-term negative effects on the growth and development of silkworm (Bombyx mori). Different silkworm varieties show the different tolerance to high temperature. The induction of autophagy is linked to increased thermotolerance in diverse ectothermic organisms. However, the function of autophagy in the thermotolerant and thermosensitive silkworm strains under high-temperature conditions remains unclear. The thermotolerant Liangguang NO.2 and thermosensitive Jingsong x Haoyue strains were used to explore the role of autophagy in thermotolerance. Here, we first found that the larval body weight gain was increased in the thermosensitive Jingsong x Haoyue strain, but there was no difference in the thermotolerant Liangguang NO.2 strain under high temperature conditions. High temperature stress had a negative influence on the cocoon performance in both the Liangguang NO.2 and Jingsong x Haoyue strains. Additionally, the autophagy-related gene Atg5 mRNA expression in the Liangguang NO.2 strain was upregulated by high temperature, while the expression of Atg12 mRNA was reduced in the Jingsong x Haoyue strain. Titers of 20-Hydroxyecdysone and the ultraspiracle 1 mRNA expression in the Liangguang NO.2 strain were upregulated by high temperature, which might be associated with the induction of autophagy. These results demonstrate the potentially regulatory mechanism of autophagy in silkworms' tolerance to high temperature, providing a theoretical basis for exploring the physiological mechanism of thermotolerance in insects.

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