Brain differences between social castes precede group formation in a primitively eusocial bee.
Brain differences between social castes precede group formation in a primitively eusocial bee.
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在原始社会性蜜蜂中，社会种姓之间的大脑差异先于群体形成。
DOI：
10.1007/s00114-019-1644-7
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Pahlke, S
Jaumann
中科院分区：
文献类型：
--
作者：
Pahlke, S
Jaumann
社交互动可能会影响大脑发育。在原始社会性昆虫中，蘑菇体（MB）是大脑中与感觉统合和学习相关的区域，蚁后的蘑菇体比工蜂的蘑菇体大。这可能反映了对蜂后的神经投资策略，也可能是对巢穴中社交互动的可塑性反应。在这里，我们发现，筑巢雌蜂（即将成为蜂王但在第一批工蜂出生之前一直独居的有生殖能力的雌蜂）比原始群居性汗蜂 Augocholella aurata 中的工蜂具有更大的 MB。两组之间的全脑大小和视叶大小没有差异，但女性创始人的触角叶也比工蜂更大。这表明，MB 的神经投资增加先于社会群体的形成。母蜂中较大的MB可能反映了为未来蜂王提供的幼虫营养的增加，以及成年蜂后缺乏来自占主导地位的蜂王的社会攻击性。
Social interactions may shape brain development. In primitively eusocial insects, the mushroom body (MB), an area of the brain associated with sensory integration and learning, is larger in queens than in workers. This may reflect a strategy of neural investment in queens or it may be a plastic response to social interactions in the nest. Here, we show that nest foundresses—the reproductive females who will become queens but are solitary until their first workers are born—have larger MBs than workers in the primitively eusocial sweat beeAugochlorella aurata. Whole brain size and optic lobe size do not differ between the two groups, but foundresses also have larger antennal lobes than workers. This shows that increased neural investment in MBs precedes social group formation. Larger MBs among foundresses may reflect the increased larval nutrition provisioned to future queens and the lack of social aggression from a dominant queen upon adult emergence.