Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae

Autores
Veiga Blanco, T.; Galetto, Leonardo; Machado, I. C.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Floral sexual phases can differ in nectar production and might be under selective pressure by pollinators. We studied Euphorbia tithymaloides, which has inflorescences that are initially female and then hermaphroditic. Volume and concentration of nectar were measured in both stages. Nectar production and the effect of extractions were determined using sets of bagged inflorescences; inflorescences in the hermaphroditic phase had higher values of nectar concentration, volume and sugar mass than inflorescences in the female phase. Nectar resorption was detected in senescent inflorescences. To test for homeostatic nectar regulation, artificial nectar was added and the response assessed after 24 h. The experiments showed that concentration and sugar mass are regulated within a narrow range, and the homeostatic points differ between the two sexual phases. These differences in nectar can be detected by hummingbirds, which prefer the female stage. Resorption and secretion seem to be part of a homeostatic mechanism by which nectar attributes are maintained to optimise sugar recovery.
Fil: Veiga Blanco, T.. Universidad de Santiago de Compostela; España
Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina
Fil: Machado, I. C.. Universidade Federal de Pernambuco; Brasil
Materia
Cyathium Protogyny
Nectar
Homeostatic Mechanism
Hummingbird Preference
Sexual Phases
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/9666
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated EuphorbiaceaeVeiga Blanco, T.Galetto, LeonardoMachado, I. C.Cyathium ProtogynyNectarHomeostatic MechanismHummingbird PreferenceSexual Phaseshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Floral sexual phases can differ in nectar production and might be under selective pressure by pollinators. We studied Euphorbia tithymaloides, which has inflorescences that are initially female and then hermaphroditic. Volume and concentration of nectar were measured in both stages. Nectar production and the effect of extractions were determined using sets of bagged inflorescences; inflorescences in the hermaphroditic phase had higher values of nectar concentration, volume and sugar mass than inflorescences in the female phase. Nectar resorption was detected in senescent inflorescences. To test for homeostatic nectar regulation, artificial nectar was added and the response assessed after 24 h. The experiments showed that concentration and sugar mass are regulated within a narrow range, and the homeostatic points differ between the two sexual phases. These differences in nectar can be detected by hummingbirds, which prefer the female stage. Resorption and secretion seem to be part of a homeostatic mechanism by which nectar attributes are maintained to optimise sugar recovery.Fil: Veiga Blanco, T.. Universidad de Santiago de Compostela; EspañaFil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); ArgentinaFil: Machado, I. C.. Universidade Federal de Pernambuco; BrasilWiley2013-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/9666Veiga Blanco, T.; Galetto, Leonardo; Machado, I. C.; Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae; Wiley; Plant Biology; 15; 6-2013; 910-9181435-8603enginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1438-8677.2012.00695.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:11:30Zoai:ri.conicet.gov.ar:11336/9666instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-10 13:11:30.666CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
title Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
spellingShingle Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
Veiga Blanco, T.
Cyathium Protogyny
Nectar
Homeostatic Mechanism
Hummingbird Preference
Sexual Phases
title_short Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
title_full Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
title_fullStr Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
title_full_unstemmed Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
title_sort Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae
dc.creator.none.fl_str_mv Veiga Blanco, T.
Galetto, Leonardo
Machado, I. C.
author Veiga Blanco, T.
author_facet Veiga Blanco, T.
Galetto, Leonardo
Machado, I. C.
author_role author
author2 Galetto, Leonardo
Machado, I. C.
author2_role author
author
dc.subject.none.fl_str_mv Cyathium Protogyny
Nectar
Homeostatic Mechanism
Hummingbird Preference
Sexual Phases
topic Cyathium Protogyny
Nectar
Homeostatic Mechanism
Hummingbird Preference
Sexual Phases
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Floral sexual phases can differ in nectar production and might be under selective pressure by pollinators. We studied Euphorbia tithymaloides, which has inflorescences that are initially female and then hermaphroditic. Volume and concentration of nectar were measured in both stages. Nectar production and the effect of extractions were determined using sets of bagged inflorescences; inflorescences in the hermaphroditic phase had higher values of nectar concentration, volume and sugar mass than inflorescences in the female phase. Nectar resorption was detected in senescent inflorescences. To test for homeostatic nectar regulation, artificial nectar was added and the response assessed after 24 h. The experiments showed that concentration and sugar mass are regulated within a narrow range, and the homeostatic points differ between the two sexual phases. These differences in nectar can be detected by hummingbirds, which prefer the female stage. Resorption and secretion seem to be part of a homeostatic mechanism by which nectar attributes are maintained to optimise sugar recovery.
Fil: Veiga Blanco, T.. Universidad de Santiago de Compostela; España
Fil: Galetto, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto Multidisciplinario de Biología Vegetal (p); Argentina
Fil: Machado, I. C.. Universidade Federal de Pernambuco; Brasil
description Floral sexual phases can differ in nectar production and might be under selective pressure by pollinators. We studied Euphorbia tithymaloides, which has inflorescences that are initially female and then hermaphroditic. Volume and concentration of nectar were measured in both stages. Nectar production and the effect of extractions were determined using sets of bagged inflorescences; inflorescences in the hermaphroditic phase had higher values of nectar concentration, volume and sugar mass than inflorescences in the female phase. Nectar resorption was detected in senescent inflorescences. To test for homeostatic nectar regulation, artificial nectar was added and the response assessed after 24 h. The experiments showed that concentration and sugar mass are regulated within a narrow range, and the homeostatic points differ between the two sexual phases. These differences in nectar can be detected by hummingbirds, which prefer the female stage. Resorption and secretion seem to be part of a homeostatic mechanism by which nectar attributes are maintained to optimise sugar recovery.
publishDate 2013
dc.date.none.fl_str_mv 2013-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/9666
Veiga Blanco, T.; Galetto, Leonardo; Machado, I. C.; Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae; Wiley; Plant Biology; 15; 6-2013; 910-918
1435-8603
url http://hdl.handle.net/11336/9666
identifier_str_mv Veiga Blanco, T.; Galetto, Leonardo; Machado, I. C.; Nectar regulation in Euphorbia tithymaloides L., a hummingbird-pollinated Euphorbiaceae; Wiley; Plant Biology; 15; 6-2013; 910-918
1435-8603
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1438-8677.2012.00695.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.993085

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