Juvenile hormone regulates extreme mandible growth in male stag beetles.

The morphological diversity of insects is one of the most striking phenomena in biology. Evolutionary modifications to the relative sizes of body parts, including the evolution of traits with exaggerated proportions, are responsible for a vast range of body forms. Remarkable examples of an insect tr...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Hiroki Gotoh, Richard Cornette, Shigeyuki Koshikawa, Yasukazu Okada, Laura Corley Lavine, Douglas J Emlen, Toru Miura
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6d5c309cac204a68a0e398f1fbab2f3b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6d5c309cac204a68a0e398f1fbab2f3b
record_format	dspace
spelling	oai:doaj.org-article:6d5c309cac204a68a0e398f1fbab2f3b2021-11-18T06:51:34ZJuvenile hormone regulates extreme mandible growth in male stag beetles.1932-620310.1371/journal.pone.0021139https://doaj.org/article/6d5c309cac204a68a0e398f1fbab2f3b2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21731659/?tool=EBIhttps://doaj.org/toc/1932-6203The morphological diversity of insects is one of the most striking phenomena in biology. Evolutionary modifications to the relative sizes of body parts, including the evolution of traits with exaggerated proportions, are responsible for a vast range of body forms. Remarkable examples of an insect trait with exaggerated proportions are the mandibular weapons of stag beetles. Male stag beetles possess extremely enlarged mandibles which they use in combat with rival males over females. As with other sexually selected traits, stag beetle mandibles vary widely in size among males, and this variable growth results from differential larval nutrition. However, the mechanisms responsible for coupling nutrition with growth of stag beetle mandibles (or indeed any insect structure) remain largely unknown. Here, we demonstrate that during the development of male stag beetles (Cyclommatus metallifer), juvenile hormone (JH) titers are correlated with the extreme growth of an exaggerated weapon of sexual selection. We then investigate the putative role of JH in the development of the nutritionally-dependent, phenotypically plastic mandibles, by increasing hemolymph titers of JH with application of the JH analog fenoxycarb during larval and prepupal developmental periods. Increased JH signaling during the early prepupal period increased the proportional size of body parts, and this was especially pronounced in male mandibles, enhancing the exaggerated size of this trait. The direction of this response is consistent with the measured JH titers during this same period. Combined, our results support a role for JH in the nutrition-dependent regulation of extreme mandible growth in this species. In addition, they illuminate mechanisms underlying the evolution of trait proportion, the most salient feature of the evolutionary diversification of the insects.Hiroki GotohRichard CornetteShigeyuki KoshikawaYasukazu OkadaLaura Corley LavineDouglas J EmlenToru MiuraPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 6, p e21139 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hiroki Gotoh Richard Cornette Shigeyuki Koshikawa Yasukazu Okada Laura Corley Lavine Douglas J Emlen Toru Miura Juvenile hormone regulates extreme mandible growth in male stag beetles.
description	The morphological diversity of insects is one of the most striking phenomena in biology. Evolutionary modifications to the relative sizes of body parts, including the evolution of traits with exaggerated proportions, are responsible for a vast range of body forms. Remarkable examples of an insect trait with exaggerated proportions are the mandibular weapons of stag beetles. Male stag beetles possess extremely enlarged mandibles which they use in combat with rival males over females. As with other sexually selected traits, stag beetle mandibles vary widely in size among males, and this variable growth results from differential larval nutrition. However, the mechanisms responsible for coupling nutrition with growth of stag beetle mandibles (or indeed any insect structure) remain largely unknown. Here, we demonstrate that during the development of male stag beetles (Cyclommatus metallifer), juvenile hormone (JH) titers are correlated with the extreme growth of an exaggerated weapon of sexual selection. We then investigate the putative role of JH in the development of the nutritionally-dependent, phenotypically plastic mandibles, by increasing hemolymph titers of JH with application of the JH analog fenoxycarb during larval and prepupal developmental periods. Increased JH signaling during the early prepupal period increased the proportional size of body parts, and this was especially pronounced in male mandibles, enhancing the exaggerated size of this trait. The direction of this response is consistent with the measured JH titers during this same period. Combined, our results support a role for JH in the nutrition-dependent regulation of extreme mandible growth in this species. In addition, they illuminate mechanisms underlying the evolution of trait proportion, the most salient feature of the evolutionary diversification of the insects.
format	article
author	Hiroki Gotoh Richard Cornette Shigeyuki Koshikawa Yasukazu Okada Laura Corley Lavine Douglas J Emlen Toru Miura
author_facet	Hiroki Gotoh Richard Cornette Shigeyuki Koshikawa Yasukazu Okada Laura Corley Lavine Douglas J Emlen Toru Miura
author_sort	Hiroki Gotoh
title	Juvenile hormone regulates extreme mandible growth in male stag beetles.
title_short	Juvenile hormone regulates extreme mandible growth in male stag beetles.
title_full	Juvenile hormone regulates extreme mandible growth in male stag beetles.
title_fullStr	Juvenile hormone regulates extreme mandible growth in male stag beetles.
title_full_unstemmed	Juvenile hormone regulates extreme mandible growth in male stag beetles.
title_sort	juvenile hormone regulates extreme mandible growth in male stag beetles.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/6d5c309cac204a68a0e398f1fbab2f3b
work_keys_str_mv	AT hirokigotoh juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT richardcornette juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT shigeyukikoshikawa juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT yasukazuokada juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT lauracorleylavine juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT douglasjemlen juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles AT torumiura juvenilehormoneregulatesextrememandiblegrowthinmalestagbeetles
_version_	1718424298175070208

Juvenile hormone regulates extreme mandible growth in male stag beetles.

Ejemplares similares