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タイトル: | Plastic brain structure changes associated with the division of labour and ageing in termites |
著者: | Ishibashi, Tomoki Waliullah, A.S.M. Aramaki, Shuhei Kamiya, Masaki Kahyo, Tomoaki Nakamura, Katsumasa Tasaki, Eisuke Takata, Mamoru Setou, Mitsutoshi Matsuura, Kenji |
著者名の別形: | 石橋, 朋樹 田﨑, 英祐 高田, 守 松浦, 健二 |
キーワード: | aging brain division of labor phenotypic plasticity social insects termites |
発行日: | Sep-2023 |
出版者: | Wiley |
誌名: | Development, Growth & Differentiation |
巻: | 65 |
号: | 7 |
開始ページ: | 374 |
終了ページ: | 383 |
抄録: | Division of labour is a prominent feature of social insect societies, where different castes engage in different specialised tasks. As brain differences are associated with behavioural differences, brain anatomy may be linked to caste polymorphism. Here, we show that termite brain morphology changes markedly with caste differentiation and age in the termite, Reticulitermes speratus. Brain morphology was shown to be associated with reproductive division of labour, with reproductive individuals (alates and neotenic reproductives) having larger brains than non-reproductives (workers and soldiers). Micro-computed tomography (CT) imaging and dissection observations showed that the king's brain morphology changed markedly with shrinkage of the optic lobes during their long life in the dark. Behavioural experiments showed that mature primary kings lose visual function as a result of optic lobe shrinkage. These results suggested that termites restructure their nervous systems to perform necessary tasks as they undergo caste differentiation, and that they also show flexible changes in brain morphology even after the final moult. This study showed that brain morphology in social insects is linked to caste and ageing, and that the evolution of the division of labour is underpinned by the development of diverse neural systems for specialised tasks. This article is protected by copyright. All rights reserved. |
著作権等: | © 2023 The Authors. Development, Growth & Differentiation published by John Wiley & Sons Australia, Ltd on behalf of Japanese Society of Developmental Biologists. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. |
URI: | http://hdl.handle.net/2433/285495 |
DOI(出版社版): | 10.1111/dgd.12873 |
PubMed ID: | 37357446 |
出現コレクション: | 学術雑誌掲載論文等 |
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