Energy Reserve Allocation in the Trade-Off between Migration and Reproduction in Fall Armyworm

文献类型： 外文期刊

第一作者： Xu, Chuan-Feng

作者： Xu, Chuan-Feng;Liu, Peng-Cheng;Chapman, Jason W.;Wang, Yu-Meng;Hu, Gao;Xu, Chuan-Feng;Chapman, Jason W.;Wotton, Karl R.;Chapman, Jason W.;Qi, Guo-Jun;Hu, Gao;Hu, Gao

作者机构：

关键词： migration and reproduction; transcriptomics; Spodoptera frugiperda; energy reallocation; flight capacity

期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）

ISSN：

年卷期： 2024 年 15 卷 10 期

页码：

收录情况： SCI

摘要： Striking a trade-off between migration and reproduction becomes imperative during long-range migration to ensure proper energy allocation. However, the mechanisms involved in this trade-off remain poorly understood. Here, we used a takeoff assay to distinguish migratory from non-migratory individuals in the fall armyworm, which is a major migratory insect worldwide. Migratory females displayed delayed ovarian development and flew further and faster than non-migratory females during tethered flight. Transcriptome analyses demonstrated an enrichment of fatty acid genes across successive levels of ovarian development and different migratory behaviors. Additionally, genes with roles in phototransduction and carbohydrate digestion along with absorption function were enriched in migratory females. Consistent with this, we identified increased abdominal lipids in migratory females that were mobilized to supply energy to the flight muscles in the thorax. Our study reveals that the fall armyworm faces a trade-off in allocating abdominal triglycerides between migration and reproduction during flight. The findings provide valuable insights for future research on this trade-off and highlight the key energy components involved in this strategic balance.

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