Dual Olfactory Pathway in the Honeybee, Apis mellifera

Kirschner, Sebastian; Kleineidam, Christoph; Zube, Christina; Rybak, Jürgen; Grünewald, Bernd; Rössler, Wolfgang

Dual Olfactory Pathway in the Honeybee, Apis mellifera

Dateien

dualolfactorykleineidam.pdfGröße: 6.27 MBDownloads: 1356

Datum

2006

Autor:innen

Kirschner, Sebastian

Kleineidam, Christoph

Zube, Christina

Rybak, Jürgen

Grünewald, Bernd

Rössler, Wolfgang

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

The Journal of Comparative Neurology. 2006, 499(6), pp. 933-952. ISSN 0021-9967. Available under: doi: 10.1002/cne.21158

Zusammenfassung

The antennal lobes (ALs) are the primary olfactory centers in the insect brain. In the AL of the honeybee, olfactory glomeruli receive input via four antennal sensory tracts (T1–4). Axons of projection neurons (PNs) leave the AL via several antenno-cerebral tracts (ACTs). To assign the input–output connectivity of all glomeruli, we investigated the spatial relationship of the antennal tracts and two prominent AL output tracts (medial and lateral ACT) mainly formed by uniglomerular (u) PNs using fluorescent tracing, confocal microscopy, and 3D analyses. Furthermore, we investigated the projections of all ACTs in higher olfactory centers, the mushroom-bodies (MB) and lateral horn (LH). The results revealed a clear segregation of glomeruli into two AL hemispheres specifically supplied by PNs of the medial and lateral ACT. PNs of the lateral ACT innervate glomeruli in the ventral-rostral AL and primarily receive input from T1 (plus a few glomeruli from T2 and T3). PNs of the medial ACT innervate glomeruli in the dorsal-caudal hemisphere, and mainly receive input from T3 (plus a few glomeruli from T2 and T4). The PNs of the m- and l-ACT terminate in different areas of the MB calyx and LH and remain largely segregated. Tracing of three mediolateral (ml) ACTs mainly formed by multiglomerular PNs revealed terminals in distinct compartments of the LH and in three olfactory foci within the lateral protocerebrum. The results indicate that olfactory input in the honeybee is processed via two separate, mainly uPN pathways to the MB calyx and LH and several pathways to the lateral protocerebrum.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

KIRSCHNER, Sebastian, Christoph KLEINEIDAM, Christina ZUBE, Jürgen RYBAK, Bernd GRÜNEWALD, Wolfgang RÖSSLER, 2006. Dual Olfactory Pathway in the Honeybee, Apis mellifera. In: The Journal of Comparative Neurology. 2006, 499(6), pp. 933-952. ISSN 0021-9967. Available under: doi: 10.1002/cne.21158

BibTex

@article{Kirschner2006-12-20Olfac-15987,
  year={2006},
  doi={10.1002/cne.21158},
  title={Dual Olfactory Pathway in the Honeybee, Apis mellifera},
  number={6},
  volume={499},
  issn={0021-9967},
  journal={The Journal of Comparative Neurology},
  pages={933--952},
  author={Kirschner, Sebastian and Kleineidam, Christoph and Zube, Christina and Rybak, Jürgen and Grünewald, Bernd and Rössler, Wolfgang}
}

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    <dcterms:abstract xml:lang="eng">The antennal lobes (ALs) are the primary olfactory centers in the insect brain. In the AL of the honeybee, olfactory glomeruli receive input via four antennal sensory tracts (T1–4). Axons of projection neurons (PNs) leave the AL via several antenno-cerebral tracts (ACTs). To assign the input–output connectivity of all glomeruli, we investigated the spatial relationship of the antennal tracts and two prominent AL output tracts (medial and lateral ACT) mainly formed by uniglomerular (u) PNs using fluorescent tracing, confocal microscopy, and 3D analyses. Furthermore, we investigated the projections of all ACTs in higher olfactory centers, the mushroom-bodies (MB) and lateral horn (LH). The results revealed a clear segregation of glomeruli into two AL hemispheres specifically supplied by PNs of the medial and lateral ACT. PNs of the lateral ACT innervate glomeruli in the ventral-rostral AL and primarily receive input from T1 (plus a few glomeruli from T2 and T3). PNs of the medial ACT innervate glomeruli in the dorsal-caudal hemisphere, and mainly receive input from T3 (plus a few glomeruli from T2 and T4). The PNs of the m- and l-ACT terminate in different areas of the MB calyx and LH and remain largely segregated. Tracing of three mediolateral (ml) ACTs mainly formed by multiglomerular PNs revealed terminals in distinct compartments of the LH and in three olfactory foci within the lateral protocerebrum. The results indicate that olfactory input in the honeybee is processed via two separate, mainly uPN pathways to the MB calyx and LH and several pathways to the lateral protocerebrum.</dcterms:abstract>
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