Pheromones are important cues for social insects such as ants. As a first step in elucidation of pheromonal information processing mechanisms in the myrmicine ant, we investigated the morphological structure of the antennal lobe. Using autofluorescence imaging, labeling of neuronal filamentous actin, and reduced silver impregnation staining, the antennal lobe was found to consist of five compartments that, each received input from a different antennal sensory tract. Two major tracts of projection neurons, the medial and lateral antenno-cerebral tract (m- and l-ACT), originated from a different region of the antennal lobe. The m-ACT originated from the posterior part of the antennal lobe whereas the l-ACT originated from the anterior part. These results demonstrate a spatial segregation of function within the antennal lobe.
Galizia, C. G., Sachse, S., Rappert, A., Menzel, R. (1999) The glomarular code for odor representations is species-specific in the honeybee Apis mellifera. Nat. Neurosci. 2, 473–478.
Galizia, C. G., McIlwrath, S. L., Menzel, R. (1999) A digital three dimensional atlas of the honeybee antennal lobe based on optical sections acquired by conforcal microscopy. Cell Tissue Res. 295, 383–394.
Iwanishi, S., Ohkawara, K. (2005) The mechanism of the queen signal in regulation of worker reproduction in the myrmicine ant Aphaenogaster smythiesi japonica. Ethol. Ecol. Evol. 17, 27–39.
Kirschner, S., Kleineidam, C. J., Zube, C., Rybak, J., Grünewald, B., Rössler, W. (2006) Dual olfactory pathway in the honeybee, Apis mellifera. J. Comp. Neurol. 499, 933–952.
Kleineidam, C. J., Obermayer, M., Halbich, W., Rössler, W. (2005) A macroglomerulus in the antennal lobe of leaf-cutting ant workers and its possible functional significance. Chem. Senses 30, 383–392.
Laissue, P. P., Reiter, C., Hiesinger, P. R., Halter, S., Fischbach, K. F., Stocker, R. F. (1999) Threedimensional reconstruction of the antennal lobe in Drosophila melanogaster. J. Comp. Neurol. 405, 543–552.
Rössler W., Kuduz, J., Schürmann, F. W., Schild, D. (2002) Aggregation of f-actin in olfactory glomeruli: a common feature of glomeruli across phyla. Chem. Senses 27, 803–810.
Seki, Y., Aonuma, H., Kanzaki, R. (2005) Pheromone processing center in the protocerebrum of Bombyx mori revealed by nitric oxide-induced anti-cGMP immunocytochemistry. J. Comp. Neurol. 481, 340–351.
Yamagata, N., Nishino, H., Mizunami, M. (2006) Pheromone-sensitive glomeruli in the primary olfactory centre of ants. Proc. R. Soc. B273, 2219–2225.
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Sakura, M., Hiraguchi, T., Ohkawara, K. et al. The Compartment Structures of the Antennal Lobe in the Ant, Aphaenogaster smythiesi japonica. BIOLOGIA FUTURA 59, 183–187 (2008). https://doi.org/10.1556/ABiol.59.2008.Suppl.27
- Olfactory glomeruli
- projection neurons
- antenno-cerebral tract
- social insect