Novel antennal lobe substructures revealed in the small hive beetle Aethina tumida

Kollmann, Martin; Rupenthal, Anna Lena; Neumann, Peter; Huetteroth, Wolf; Schachtner, Joachim (2016). Novel antennal lobe substructures revealed in the small hive beetle Aethina tumida. Cell and tissue research, 363(3), pp. 679-692. Springer 10.1007/s00441-015-2282-9

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The small hive beetle, Aethina tumida, is an emerging pest of social bee colonies. A. tumida shows a specialized life style for which olfaction seems to play a crucial role. To better understand the olfactory system of the beetle, we used immunohistochemistry and 3-D reconstruction to analyze brain structures, especially the paired antennal lobes (AL), which represent the first integration centers for odor information in the insect brain. The basic neuroarchitecture of the A. tumida brain compares well to the typical beetle and insect brain. In comparison to other insects, the AL are relatively large in relationship to other brain areas, suggesting that olfaction is of major importance for the beetle. The AL of both sexes contain about 70 olfactory glomeruli with no obvious size differences of the glomeruli between sexes. Similar to all other insects including beetles, immunostaining with an antiserum against serotonin revealed a large cell that projects from one AL to the contralateral AL to densely innervate all glomeruli. Immunostaining with an antiserum against tachykinin-related peptides (TKRP) revealed hitherto unknown structures in the AL. Small TKRP-immunoreactive spherical substructures are in both sexes evenly distributed within all glomeruli. The source for these immunoreactive islets is very likely a group of about 80 local AL interneurons. We offer two hypotheses on the function of such structures.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Institute of Bee Health

UniBE Contributor:

Neumann, Peter

Subjects:

500 Science > 590 Animals (Zoology)
600 Technology > 630 Agriculture

ISSN:

0302-766X

Publisher:

Springer

Language:

English

Submitter:

Gina Retschnig

Date Deposited:

19 Jul 2016 09:55

Last Modified:

12 Mar 2021 09:20

Publisher DOI:

10.1007/s00441-015-2282-9

PubMed ID:

26496732

Uncontrolled Keywords:

3D reconstruction; Insect; Neuropeptide; Olfactory system; Serotonin

BORIS DOI:

10.7892/boris.83729

URI:

https://boris.unibe.ch/id/eprint/83729

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