Caste-specific postembryonic development of primary and secondary olfactory centers in the female honeybee brain

被引:65
作者
Groh, Claudia [1 ]
Roessler, Wolfgang [1 ]
机构
[1] Univ Wurzburg, Biozentrum, Dept Behav Physiol & Sociobiol, D-97074 Wurzburg, Germany
关键词
antennal lobe; mushroom body; queen; neuronal plasticity; glomeruli; microglomeruli;
D O I
10.1016/j.asd.2008.04.001
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Eusocial insects are characterized by division of labor among a sterile worker caste and a reproductive queen. In the honeybee both female castes are determined postembryonically by environmental factors, and queens develop substantially faster than workers. Since olfaction plays a crucial role in organizing honeybee behavior and social interactions, we compared the development of primary and secondary olfactory centers in the brain. Age-synchronized queen and worker pupae were raised in incubators at 34.5 degrees C, and their external morphology was characterized for all pupal stages. The development of olfactory synaptic neuropil was analyzed using anti-synapsin immunocytochemistry, f-actin-phalloidin labeling and confocal microscopy. In the antennal lobes of queens olfactory glomeruli formed similar to 4 days earlier than in workers. The adult number of olfactory glomeruli was in a similar range, but the total glomerular volume was slightly smaller in queens. Olfactory and visual subdivisions (lip, collar) of the mushroom-body calyx formed early, whereas the basal ring separated]ale. Synaptic microglomeruli in the olfactory lip were established similar to 3-4 days earlier in queens compared to workers. We propose that developmental heterochrony results in fewer synapses in olfactory centers (smaller glomeruli, fewer microglomeruli) in queens, which may result in poorer performance on olfactory learning tasks compared to workers. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:459 / 468
页数:10
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