We compared the morphology of the primary olfactory center, the antennal lobe (AL), in 2 homopteran insects, Hyalesthes obsoletus Signoret (Homoptera: Cixiidae) and Scaphoideus titanus Ball (Homoptera: Cicadomorpha). The comparison between the ALs of the 2 species is particularly interesting considering that, although both use volatile cues to locate their host plants, their feeding behavior differs considerably: specifically, H. obsoletus is a highly polyphagous species, whereas S. titanus is strictly monophagous (on grapevine). Our investigation of the AL structure using immunocytochemical staining and antennal backfills did not reveal any sexual dimorphism in either the size of the ALs or in the size of individual glomeruli for either species. Instead, the AL of H. obsoletus displayed numerous and well-delineated glomeruli (about 130 in both sexes) arranged in a multilayered structure, whereas the smaller AL of S. titanus contained fewer than 15 glomerular-like structures. This difference is likely to reflect the comparatively reduced olfactory abilities in S. titanus, probably as a consequence of the reduced number of volatiles coming from the single host plant. Instead, in H. obsoletus, the ability to distinguish among several host plants may require a more complex olfactory neuronal network

Rossi Stacconi, M.V.; Hansson, B.S.; Rybak, J.; Romani, R. (2014). Comparative neuroanatomy of the antennal lobes of 2 homopteran species. CHEMICAL SENSES, 39 (4): 283-294. doi: 10.1093/chemse/bjt114 handle: http://hdl.handle.net/10449/24038

Comparative neuroanatomy of the antennal lobes of 2 homopteran species

Rossi Stacconi, Marco Valerio;
2014-01-01

Abstract

We compared the morphology of the primary olfactory center, the antennal lobe (AL), in 2 homopteran insects, Hyalesthes obsoletus Signoret (Homoptera: Cixiidae) and Scaphoideus titanus Ball (Homoptera: Cicadomorpha). The comparison between the ALs of the 2 species is particularly interesting considering that, although both use volatile cues to locate their host plants, their feeding behavior differs considerably: specifically, H. obsoletus is a highly polyphagous species, whereas S. titanus is strictly monophagous (on grapevine). Our investigation of the AL structure using immunocytochemical staining and antennal backfills did not reveal any sexual dimorphism in either the size of the ALs or in the size of individual glomeruli for either species. Instead, the AL of H. obsoletus displayed numerous and well-delineated glomeruli (about 130 in both sexes) arranged in a multilayered structure, whereas the smaller AL of S. titanus contained fewer than 15 glomerular-like structures. This difference is likely to reflect the comparatively reduced olfactory abilities in S. titanus, probably as a consequence of the reduced number of volatiles coming from the single host plant. Instead, in H. obsoletus, the ability to distinguish among several host plants may require a more complex olfactory neuronal network
Antennal lobe
confocal microscopy
Glomeruli
Olfaction
Hyalesthes obsoletus
Scaphoideus titanus
Lobo antennale
Microscopia confocale
Glomeruli
Olfatto
Settore AGR/11 - ENTOMOLOGIA GENERALE E APPLICATA
2014
Rossi Stacconi, M.V.; Hansson, B.S.; Rybak, J.; Romani, R. (2014). Comparative neuroanatomy of the antennal lobes of 2 homopteran species. CHEMICAL SENSES, 39 (4): 283-294. doi: 10.1093/chemse/bjt114 handle: http://hdl.handle.net/10449/24038
File in questo prodotto:
File Dimensione Formato  
Comparative Neuroanatomy of the Antennal Lobes of 2 Homopteran Species.pdf

non disponibili

Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 2.18 MB
Formato Adobe PDF
2.18 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/24038
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 10
  • ???jsp.display-item.citation.isi??? 10
social impact