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气味受体表达和触角叶结构与亚洲蜜蜂（膜翅目：蜜蜂科）的级型二态性相关。

Odorant Receptors Expressing and Antennal Lobes Architecture Are Linked to Caste Dimorphism in Asian Honeybee, (Hymenoptera: Apidae).

机构信息

Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, School of Life Science, Northeast Normal University, Changchun 130024, China.

Key Laboratory of Vegetation Ecology, MOE, Northeast Normal University, Changchun 130024, China.

出版信息

Int J Mol Sci. 2024 Apr 1;25(7):3934. doi: 10.3390/ijms25073934.

DOI:10.3390/ijms25073934
PMID:38612745
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11012130/
Abstract

Insects heavily rely on the olfactory system for food, mating, and predator evasion. However, the caste-related olfactory differences in , a eusocial insect, remain unclear. To explore the peripheral and primary center of the olfactory system link to the caste dimorphism in , transcriptome and immunohistochemistry studies on the odorant receptors (ORs) and architecture of antennal lobes (ALs) were performed on different castes. Through transcriptomesis, we found more olfactory receptor genes in queens and workers than in drones, which were further validated by RT-qPCR, indicating caste dimorphism. Meanwhile, ALs structure, including volume, surface area, and the number of glomeruli, demonstrated a close association with caste dimorphism. Particularly, drones had more macroglomeruli possibly for pheromone recognition. Interestingly, we found that the number of ORs and glomeruli ratio was nearly 1:1. Also, the ORs expression distribution pattern was very similar to the distribution of glomeruli volume. Our results suggest the existence of concurrent plasticity in both the peripheral olfactory system and ALs among different castes of , highlighting the role of the olfactory system in labor division in insects.

摘要

昆虫在觅食、交配和逃避捕食者方面严重依赖嗅觉系统。然而，社会性昆虫中与等级相关的嗅觉差异尚不清楚。为了探索与等级二型现象相关的嗅觉系统的外周和初级中枢联系，我们对不同等级的 触角叶（AL）的气味受体（OR）和结构进行了转录组和免疫组织化学研究。通过转录组学，我们发现与雄蜂相比，蜂王和工蜂中具有更多的嗅觉受体基因，这通过 RT-qPCR 进一步得到了验证，表明存在等级二型现象。同时，触角叶结构，包括体积、表面积和神经球数量，与等级二型密切相关。特别是，雄蜂可能具有更多的大型神经球，用于识别信息素。有趣的是，我们发现 ORs 的数量和神经球的比例几乎为 1:1。此外，ORs 的表达分布模式与神经球体积的分布非常相似。我们的研究结果表明，不同等级的 中，外周嗅觉系统和 AL 之间存在同时可塑性，突出了嗅觉系统在昆虫劳动分工中的作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/12c3/11012130/0d07f0e6e53d/ijms-25-03934-g009.jpg
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