Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy

Background and Aims: A significant proportion of orchid species assigned to subtribe Oncidiinae produce floral oil as a food reward that attracts specialized bee pollinators. This oil is produced either by glabrous glands (epithelial elaiophores) or by tufts of secretory hairs (trichomal elaiophores...

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Detalles Bibliográficos
Autores: Blanco Coto, Mario Alberto, Davies, Kevin L., Stpiczynska, Malgorzata, Carlsward, Barbara, Ionta, Gretchen M., Gerlach, Günter
Tipo de recurso: artículo
Fecha de publicación:2013
País:Costa Rica
Institución:Universidad de Costa Rica
Repositorio:Kérwá
Idioma:inglés
OAI Identifier:oai:kerwa.ucr.ac.cr:10669/85742
Acceso en línea:https://academic.oup.com/aob/article/112/9/1775/275335
https://hdl.handle.net/10669/85742
Access Level:acceso abierto
Palabra clave:Anatomy
Callus
Elaiophore
Lockhartia
Oil secretion
Oncidiinae
Orchidaceae
Trichomes
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repository_id_str
dc.title.es_ES.fl_str_mv Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
title Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
spellingShingle Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
Blanco Coto, Mario Alberto
Anatomy
Callus
Elaiophore
Lockhartia
Oil secretion
Oncidiinae
Orchidaceae
Trichomes
title_short Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
title_full Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
title_fullStr Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
title_full_unstemmed Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
title_sort Floral elaiophores in Lockhartia Hook. (Orchidaceae: Oncidiinae): their distribution, diversity and anatomy
dc.creator.none.fl_str_mv Blanco Coto, Mario Alberto
Davies, Kevin L.
Stpiczynska, Malgorzata
Carlsward, Barbara
Ionta, Gretchen M.
Gerlach, Günter
author Blanco Coto, Mario Alberto
author_facet Blanco Coto, Mario Alberto
Davies, Kevin L.
Stpiczynska, Malgorzata
Carlsward, Barbara
Ionta, Gretchen M.
Gerlach, Günter
author_role author
author2 Davies, Kevin L.
Stpiczynska, Malgorzata
Carlsward, Barbara
Ionta, Gretchen M.
Gerlach, Günter
author2_role author
author
author
author
author
dc.subject.es_ES.fl_str_mv Anatomy
Callus
Elaiophore
Lockhartia
Oil secretion
Oncidiinae
Orchidaceae
Trichomes
topic Anatomy
Callus
Elaiophore
Lockhartia
Oil secretion
Oncidiinae
Orchidaceae
Trichomes
description Background and Aims: A significant proportion of orchid species assigned to subtribe Oncidiinae produce floral oil as a food reward that attracts specialized bee pollinators. This oil is produced either by glabrous glands (epithelial elaiophores) or by tufts of secretory hairs (trichomal elaiophores). Although the structure of epithelial elaiophores in the Oncidiinae has been well documented, trichomal elaiophores are less common and have not received as much attention. Only trichomal elaiophores occur in the genus Lockhartia, and their distribution and structure are surveyed here for the first time. Methods: Flowers of 16 species of Lockhartia were studied. The location of floral elaiophores was determined histochemically and their anatomical organization and mode of oil secretionwas investigated by means of light microscopy, scanning electron microscopy and transmission electron microscopy. Key Results and Conclusions: All species of Lockhartia investigated have trichomal elaiophores on the adaxial surface of the labellum. Histochemical tests revealed the presence of lipoidal substances within the labellar trichomes. However, the degree of oil production and the distribution of trichomes differed between the three major groups of species found within the genus. All trichomes were unicellular and, in some species, of two distinct sizes, the larger being either capitate or apically branched. The trichomal cuticle was lamellate, and often appeared distended due to the subcuticular accumulation of oil. The labellar trichomes of the three species examined using transmission electron microscopy contained dense, intensely staining cytoplasm with apically located vacuoles. Oil-laden secretory vesicles fused with the plasmalemma and discharged their contents. Oil eventually accumulated between the cell wall and cuticle of the trichome and contained electron-transparent profiles or droplets. This condition is considered unique to Lockhartia among those species of elaiophore-bearing Oncidiinae studied to date.
publishDate 2013
dc.date.issued.none.fl_str_mv 2013
dc.date.accessioned.none.fl_str_mv 2022-02-11T18:42:25Z
dc.date.available.none.fl_str_mv 2022-02-11T18:42:25Z
dc.type.none.fl_str_mv artículo original
http://purl.org/coar/resource_type/c_2df8fbb1
info:eu-repo/semantics/article
format article
dc.identifier.citation.none.fl_str_mv https://academic.oup.com/aob/article/112/9/1775/275335
dc.identifier.issn.none.fl_str_mv 1095-8290
0305-7364
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/10669/85742
dc.identifier.doi.none.fl_str_mv 10.1093/aob/mct232
url https://academic.oup.com/aob/article/112/9/1775/275335
https://hdl.handle.net/10669/85742
identifier_str_mv 1095-8290
0305-7364
10.1093/aob/mct232
dc.language.iso.es_ES.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv acceso abierto
http://purl.org/coar/access_right/c_abf2
info:eu-repo/semantics/openAccess
rights_invalid_str_mv acceso abierto
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.source.es_ES.fl_str_mv Annals of Botany, vol.112(9), pp.1775-1791.
dc.source.none.fl_str_mv reponame:Kérwá
instname:Universidad de Costa Rica
instacron:UCR
instname_str Universidad de Costa Rica
instacron_str UCR
institution UCR
reponame_str Kérwá
collection Kérwá
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spelling Blanco Coto, Mario Alberto0ff04600-5f68-4881-9361-aa0f7726e81a600Davies, Kevin L.c424df0d-dcf7-4f1d-9720-9ed69aad79c2Stpiczynska, Malgorzata6e4dedbd-844e-464c-b8a9-235fe9a51756Carlsward, Barbara8ef47fc7-abfe-4af7-8b7d-117968cce1cb600Ionta, Gretchen M.00c54cdb-3785-4240-85fc-fc7792a18d5fGerlach, Günter6e030750-764d-4791-a923-a551fa924fd46002022-02-11T18:42:25Z2022-02-11T18:42:25Z2013https://academic.oup.com/aob/article/112/9/1775/2753351095-82900305-7364https://hdl.handle.net/10669/8574210.1093/aob/mct232Background and Aims: A significant proportion of orchid species assigned to subtribe Oncidiinae produce floral oil as a food reward that attracts specialized bee pollinators. This oil is produced either by glabrous glands (epithelial elaiophores) or by tufts of secretory hairs (trichomal elaiophores). Although the structure of epithelial elaiophores in the Oncidiinae has been well documented, trichomal elaiophores are less common and have not received as much attention. Only trichomal elaiophores occur in the genus Lockhartia, and their distribution and structure are surveyed here for the first time. Methods: Flowers of 16 species of Lockhartia were studied. The location of floral elaiophores was determined histochemically and their anatomical organization and mode of oil secretionwas investigated by means of light microscopy, scanning electron microscopy and transmission electron microscopy. Key Results and Conclusions: All species of Lockhartia investigated have trichomal elaiophores on the adaxial surface of the labellum. Histochemical tests revealed the presence of lipoidal substances within the labellar trichomes. However, the degree of oil production and the distribution of trichomes differed between the three major groups of species found within the genus. All trichomes were unicellular and, in some species, of two distinct sizes, the larger being either capitate or apically branched. The trichomal cuticle was lamellate, and often appeared distended due to the subcuticular accumulation of oil. The labellar trichomes of the three species examined using transmission electron microscopy contained dense, intensely staining cytoplasm with apically located vacuoles. Oil-laden secretory vesicles fused with the plasmalemma and discharged their contents. Oil eventually accumulated between the cell wall and cuticle of the trichome and contained electron-transparent profiles or droplets. This condition is considered unique to Lockhartia among those species of elaiophore-bearing Oncidiinae studied to date.American Orchid Society/[]AOS/Estados UnidosUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Biologíaengacceso abiertohttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessAnnals of Botany, vol.112(9), pp.1775-1791.reponame:Kérwáinstname:Universidad de Costa Ricainstacron:UCRAnatomyCallusElaiophoreLockhartiaOil secretionOncidiinaeOrchidaceaeTrichomesFloral elaiophores in Lockhartia Hook. 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