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Pheromone Detection by a Pheromone Emitter : A Small Sex Pheromone-Specific Processing System in the Female American Cockroach

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Title: Pheromone Detection by a Pheromone Emitter : A Small Sex Pheromone-Specific Processing System in the Female American Cockroach
Authors: Nishino, Hiroshi Browse this author →KAKEN DB
Iwasaki, Masazumi Browse this author
Mizunami, Makoto Browse this author
Keywords: insects
macroglomerular complex
pheromonal communication
projection neuron
sexual dimorphism
Issue Date: Mar-2011
Publisher: Oxford University Press
Journal Title: Chemical Senses
Volume: 36
Issue: 3
Start Page: 261
End Page: 270
Publisher DOI: 10.1093/chemse/bjq122
PMID: 21098584
Abstract: Many animals depend on pheromone communication for successful mating. Sex pheromone in insects is usually released by females to attract males. In American cockroaches, the largest glomerulus (B-glomerulus) in the male antennal lobe (first-order olfactory centre) processes the major component of sex pheromone. Using intracellular recordings combined with fine neuroanatomical techniques, we provide evidence that the female homolog of the male B-glomerulus also acts as a sex pheromone-specific detector. Whereas ordinary glomeruli that process normal environmental odors are innervated by single PNs, the B-glomerulus in both sexes is innervated by multiple PNs, one of which possesses a thicker axon, termed here B-PN. Both soma size and axon diameter were smaller on B-PNs from females compared to B-PNs from males. The female B-PNs also produce fewer terminal arborizations in the protocerebrum than male B-PNs. Termination fields in the lateral protocerebrum of the female B-PN are mostly segregated from those formed by other uniglomerular PNs innervating ordinary glomeruli. Female B-PN activity was greatest in response to sex pheromone but lower than that in the male B-PN. This specific detection system suggests that sex pheromone affects the behavior and/or endocrine system of female cockroaches.
Rights: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Chemical Senses following peer review. The definitive publisher-authenticated version Chem. Senses (2011) 36 (3): 261-270 is available online at:
Type: article (author version)
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 西野 浩史

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