Cargando…

Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon

In herbivorous insects, food selection depends on sensitivity to specific chemical stimuli from host-plants as well as to secondary metabolites (bitter) and to sugars (phagostimulatory). Bitter compounds are noxious, unpalatable or both and evoke an aversive feeding response. Instead, sugars and sug...

Descripción completa

Detalles Bibliográficos
Autores principales: Sollai, Giorgia, Tomassini Barbarossa, Iole, Masala, Carla, Solari, Paolo, Crnjar, Roberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067346/
https://www.ncbi.nlm.nih.gov/pubmed/24956387
http://dx.doi.org/10.1371/journal.pone.0100675
_version_ 1782322279745585152
author Sollai, Giorgia
Tomassini Barbarossa, Iole
Masala, Carla
Solari, Paolo
Crnjar, Roberto
author_facet Sollai, Giorgia
Tomassini Barbarossa, Iole
Masala, Carla
Solari, Paolo
Crnjar, Roberto
author_sort Sollai, Giorgia
collection PubMed
description In herbivorous insects, food selection depends on sensitivity to specific chemical stimuli from host-plants as well as to secondary metabolites (bitter) and to sugars (phagostimulatory). Bitter compounds are noxious, unpalatable or both and evoke an aversive feeding response. Instead, sugars and sugar alcohols play a critical role in determining and enhancing the palatability of foods. We assumed that peripheral taste sensitivity may be related to the width of the host selection. Our model consists of two closely phylogenetically related Papilionid species exhibiting a difference in host plant choice: Papilio hospiton and Papilio machaon. The spike activity of the lateral and medial maxillary styloconic taste sensilla was recorded following stimulation with several carbohydrates, nicotine and NaCl, with the aim of characterizing their gustatory receptor neurons and of comparing their response patterns in the light of their different acceptability in feeding behaviour. The results show that: a) each sensillum houses phagostimulant and phagodeterrent cells; b) the spike activity of the gustatory neurons in response to different taste stimuli is higher in P. hospiton than in P. machaon; c) sugar solutions inhibit the spike activity of the deterrent and salt cells, and the suppression is higher in P. machaon than in P. hospiton. In conclusion, we propose that the different balance between the phagostimulant and phagodeterrent inputs from GRNs of maxillary sensilla may contribute in determining the difference in food choice and host range.
format Online
Article
Text
id pubmed-4067346
institution National Center for Biotechnology Information
language English
publishDate 2014
publisher Public Library of Science
record_format MEDLINE/PubMed
spelling pubmed-40673462014-06-25 Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon Sollai, Giorgia Tomassini Barbarossa, Iole Masala, Carla Solari, Paolo Crnjar, Roberto PLoS One Research Article In herbivorous insects, food selection depends on sensitivity to specific chemical stimuli from host-plants as well as to secondary metabolites (bitter) and to sugars (phagostimulatory). Bitter compounds are noxious, unpalatable or both and evoke an aversive feeding response. Instead, sugars and sugar alcohols play a critical role in determining and enhancing the palatability of foods. We assumed that peripheral taste sensitivity may be related to the width of the host selection. Our model consists of two closely phylogenetically related Papilionid species exhibiting a difference in host plant choice: Papilio hospiton and Papilio machaon. The spike activity of the lateral and medial maxillary styloconic taste sensilla was recorded following stimulation with several carbohydrates, nicotine and NaCl, with the aim of characterizing their gustatory receptor neurons and of comparing their response patterns in the light of their different acceptability in feeding behaviour. The results show that: a) each sensillum houses phagostimulant and phagodeterrent cells; b) the spike activity of the gustatory neurons in response to different taste stimuli is higher in P. hospiton than in P. machaon; c) sugar solutions inhibit the spike activity of the deterrent and salt cells, and the suppression is higher in P. machaon than in P. hospiton. In conclusion, we propose that the different balance between the phagostimulant and phagodeterrent inputs from GRNs of maxillary sensilla may contribute in determining the difference in food choice and host range. Public Library of Science 2014-06-23 /pmc/articles/PMC4067346/ /pubmed/24956387 http://dx.doi.org/10.1371/journal.pone.0100675 Text en © 2014 Sollai et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Sollai, Giorgia
Tomassini Barbarossa, Iole
Masala, Carla
Solari, Paolo
Crnjar, Roberto
Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title_full Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title_fullStr Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title_full_unstemmed Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title_short Gustatory Sensitivity and Food Acceptance in Two Phylogenetically Closely Related Papilionid Species: Papilio hospiton and Papilio machaon
title_sort gustatory sensitivity and food acceptance in two phylogenetically closely related papilionid species: papilio hospiton and papilio machaon
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4067346/
https://www.ncbi.nlm.nih.gov/pubmed/24956387
http://dx.doi.org/10.1371/journal.pone.0100675
work_keys_str_mv AT sollaigiorgia gustatorysensitivityandfoodacceptanceintwophylogeneticallycloselyrelatedpapilionidspeciespapiliohospitonandpapiliomachaon
AT tomassinibarbarossaiole gustatorysensitivityandfoodacceptanceintwophylogeneticallycloselyrelatedpapilionidspeciespapiliohospitonandpapiliomachaon
AT masalacarla gustatorysensitivityandfoodacceptanceintwophylogeneticallycloselyrelatedpapilionidspeciespapiliohospitonandpapiliomachaon
AT solaripaolo gustatorysensitivityandfoodacceptanceintwophylogeneticallycloselyrelatedpapilionidspeciespapiliohospitonandpapiliomachaon
AT crnjarroberto gustatorysensitivityandfoodacceptanceintwophylogeneticallycloselyrelatedpapilionidspeciespapiliohospitonandpapiliomachaon