Distinct antennal lobe phenotypes in the leaf-cutting ant (Atta vollenweideri)

Kübler, Linda S.; Kelber, Christina; Kleineidam, Christoph

Distinct antennal lobe phenotypes in the leaf-cutting ant (Atta vollenweideri)

Dateien

Kuebler_opus-104087.pdfGröße: 843.4 KBDownloads: 367

Datum

2010

Autor:innen

Kübler, Linda S.

Kelber, Christina

Kleineidam, Christoph

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Comparative Neurology. 2010, 518(3), pp. 352-365. ISSN 0021-9967. eISSN 1096-9861. Available under: doi: 10.1002/cne.22217

Zusammenfassung

Leaf-cutting ants (Atta vollenweideri) express a remarkable size polymorphism across the two sexual castes (queens and males) but in particular within the worker caste. Worker size is related to behavior (alloethism), separating workers into behavioral subcastes. The neuronal mechanisms underlying differences in behavior within the worker caste are still unknown. In this study, we first compared selected neuropils, in particular, the antennal lobes (AL) in males, queens, and workers. The males' ALs contain three extremely large, sex-specific glomeruli (macroglomeruli; MGs) and in total comprise fewer glomeruli (242) than the ALs of queens (about 346 glomeruli). In contrast to males, the queen ALs contain only one large glomerulus at a lateral position. The largest number of glomeruli was found in workers (396-442). In a previous paper, we described an MG in the workers' AL, and, in the second part of this study, we show that within workers two distinct, size-related AL phenotypes exist: the MG phenotype (containing a macroglomerulus) and the RG phenotype, with all glomeruli of regular size. This neuroanatomical polyphenism is established during pupal development and separates the worker caste into two neuroanatomical subcastes. Third, we investigate the functional significance of the MG in workers. By using calcium imaging to monitor activity of AL projection neurons, we show that the releaser component of the trail pheromone is represented in the same region as the MG. We propose that phenotypic trait variation in the organization of the ALs leads to differences in odor information processing that finally result in size-related differences in trail-following behavior.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

KÜBLER, Linda S., Christina KELBER, Christoph KLEINEIDAM, 2010. Distinct antennal lobe phenotypes in the leaf-cutting ant (Atta vollenweideri). In: Journal of Comparative Neurology. 2010, 518(3), pp. 352-365. ISSN 0021-9967. eISSN 1096-9861. Available under: doi: 10.1002/cne.22217

BibTex

@article{Kubler2010Disti-1187,
  year={2010},
  doi={10.1002/cne.22217},
  title={Distinct antennal lobe phenotypes in the leaf-cutting ant (Atta vollenweideri)},
  number={3},
  volume={518},
  issn={0021-9967},
  journal={Journal of Comparative Neurology},
  pages={352--365},
  author={Kübler, Linda S. and Kelber, Christina and Kleineidam, Christoph}
}

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    <dcterms:abstract xml:lang="eng">Leaf-cutting ants (Atta vollenweideri) express a remarkable size polymorphism across the two sexual castes (queens and males) but in particular within the worker caste. Worker size is related to behavior (alloethism), separating workers into behavioral subcastes. The neuronal mechanisms underlying differences in behavior within the worker caste are still unknown. In this study, we first compared selected neuropils, in particular, the antennal lobes (AL) in males, queens, and workers. The males' ALs contain three extremely large, sex-specific glomeruli (macroglomeruli; MGs) and in total comprise fewer glomeruli (242) than the ALs of queens (about 346 glomeruli). In contrast to males, the queen ALs contain only one large glomerulus at a lateral position. The largest number of glomeruli was found in workers (396-442). In a previous paper, we described an MG in the workers' AL, and, in the second part of this study, we show that within workers two distinct, size-related AL phenotypes exist: the MG phenotype (containing a macroglomerulus) and the RG phenotype, with all glomeruli of regular size. This neuroanatomical polyphenism is established during pupal development and separates the worker caste into two neuroanatomical subcastes. Third, we investigate the functional significance of the MG in workers. By using calcium imaging to monitor activity of AL projection neurons, we show that the releaser component of the trail pheromone is represented in the same region as the MG. We propose that phenotypic trait variation in the organization of the ALs leads to differences in odor information processing that finally result in size-related differences in trail-following behavior.</dcterms:abstract>
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Universitätsbibliographie

Ja