大黄蜂(Bombus ignitus)多巴胺能系统的种姓特异性发育。

IF 2.3 2区 农林科学 Q1 ENTOMOLOGY Journal of insect physiology Pub Date : 2024-06-19 DOI:10.1016/j.jinsphys.2024.104665
Takafumi Onuma, Ken Sasaki
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引用次数: 0

摘要

多巴胺能系统参与了社会性熊蜂的种性特异行为。然而,人们对多巴胺能系统的种性差异是如何在熊蜂蛹期大脑中形成的知之甚少。因此,我们研究了雌性点火熊蜂脑内多巴胺相关物质的水平以及编码多巴胺合成和代谢酶、多巴胺受体和多巴胺转运体的基因的表达。从化蛹后期到出壳,雌鸟脑内多巴胺和多巴胺相关物质的含量明显高于工蜂,但不同种群之间的动态变化相似。编码多巴胺合成酶(BigTh和BigDdc)和多巴胺代谢酶(BigNat)的基因的相对表达水平从蛹期到出巢期显著增加,但这些基因的相对表达水平在不同种群之间没有差异。四个多巴胺受体基因(BigDop1、BigDop2、BigDop3和BigDopEcR)和一个多巴胺转运体基因(BigDat)的相对表达水平也出现了类似的模式。与蜜蜂Apis mellifera相比,大黄蜂种姓特异性多巴胺能系统的分化程度较低,这可能反映了这两个物种的行为特化程度。
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Caste-specific development of the dopaminergic system in bumble bees (Bombus ignitus)

The dopaminergic system is involved in caste-specific behaviors in eusocial bumble bees. However, little is known about how the caste differences in dopaminergic system are formed during pupal stages in the brains of bumble bees. Thus, we investigated the levels of dopamine-related substances and expression of genes encoding enzymes involved in dopamine synthesis and metabolism, dopamine receptors, and a dopamine transporter in the brain of female Bombus ignitus. The levels of dopamine and dopamine-related substances in the brain were significantly higher in gynes than in workers from the late pupal stage to emergence, but the dynamics were similar between the castes. The relative expression levels of genes encoding enzymes involved in dopamine synthesis (BigTh and BigDdc) and dopamine metabolism (BigNat) increased significantly from pupal stage to emergence, but there were no differences in the relative expression levels of these genes between castes. A similar pattern was seen in the relative expression levels of four dopamine receptor genes (BigDop1, BigDop2, BigDop3, and BigDopEcR) and a dopamine transporter gene (BigDat). Compared with the honey bee Apis mellifera, the caste-specific dopaminergic system in the bumble bee is less differentiated, which might reflect the degree of behavioral specialization in these two species.

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来源期刊
Journal of insect physiology
Journal of insect physiology 生物-昆虫学
CiteScore
4.50
自引率
4.50%
发文量
77
审稿时长
57 days
期刊介绍: All aspects of insect physiology are published in this journal which will also accept papers on the physiology of other arthropods, if the referees consider the work to be of general interest. The coverage includes endocrinology (in relation to moulting, reproduction and metabolism), pheromones, neurobiology (cellular, integrative and developmental), physiological pharmacology, nutrition (food selection, digestion and absorption), homeostasis, excretion, reproduction and behaviour. Papers covering functional genomics and molecular approaches to physiological problems will also be included. Communications on structure and applied entomology can be published if the subject matter has an explicit bearing on the physiology of arthropods. Review articles and novel method papers are also welcomed.
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