Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)

With approximately 200 species, the tribe Sobralieae is a dominant and common Neotropical group of orchids, yet little is known of variation in floral morphology as it relates to their pollination. As currently circumscribed, the tribe includes four genera that differ considerably in flower size...

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Autores principales:	Neubig, Kurt M., Carlsward, Barbara S., Whitten, W. Mark, Williams, Norris H.
Formato:	Online
Idioma:	spa
Publicado:	Universidad de Costa Rica 2015
Acceso en línea:	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/20744

id	LANKESTERIANA20744
record_format	ojs
spelling	LANKESTERIANA207442022-10-10T00:29:31Z Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae) Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae) Neubig, Kurt M. Carlsward, Barbara S. Whitten, W. Mark Williams, Norris H. Deceit Elleanthus nectar nectary pollination Sobralia Sobralieae Deceit Elleanthus nectar nectary pollination Sobralia Sobralieae With approximately 200 species, the tribe Sobralieae is a dominant and common Neotropical group of orchids, yet little is known of variation in floral morphology as it relates to their pollination. As currently circumscribed, the tribe includes four genera that differ considerably in flower size and morphology: Elleanthus, Epilyna, Sertifera, and Sobralia. Although nectar-foraging pollinators are known for some species, the relationships of pollination to deceit and to nectar production are all poorly understood. We examined pollination-related of nectaries and nectar characteristics (presence/absence, volume, and concentration) for major clades of Sobralieae. Some species produce abundant nectar, but many species offer no reward. When present, nectar is secreted by thickened calli at the lip base. The cells of the nectariferous calli contain starch, which is rapidly converted to sugar during a brief anthesis (often lasting only one day). Most Sobralia flowers are relatively large, bee-pollinated, with a gullet-shaped lip, false nectary, large pollinia, and offer no reward. Elleanthus flowers are relatively small with a legitimate nectar reward, and most species are hummingbird- pollinated. Hummingbird-pollinated Sobralieae flowers are relatively small, brightly colored in the perianth and/or the subtending bracts, somewhat tubular, with a lip that forms a cup around the callus for storing nectar, and pollinia that are dark and relatively small.  With approximately 200 species, the tribe Sobralieae is a dominant and common Neotropical group of orchids, yet little is known of variation in floral morphology as it relates to their pollination. As currently circumscribed, the tribe includes four genera that differ considerably in flower size and morphology: Elleanthus, Epilyna, Sertifera, and Sobralia. Although nectar-foraging pollinators are known for some species, the relationships of pollination to deceit and to nectar production are all poorly understood. We examined pollination-related of nectaries and nectar characteristics (presence/absence, volume, and concentration) for major clades of Sobralieae. Some species produce abundant nectar, but many species offer no reward. When present, nectar is secreted by thickened calli at the lip base. The cells of the nectariferous calli contain starch, which is rapidly converted to sugar during a brief anthesis (often lasting only one day). Most Sobralia flowers are relatively large, bee-pollinated, with a gullet-shaped lip, false nectary, large pollinia, and offer no reward. Elleanthus flowers are relatively small with a legitimate nectar reward, and most species are hummingbird- pollinated. Hummingbird-pollinated Sobralieae flowers are relatively small, brightly colored in the perianth and/or the subtending bracts, somewhat tubular, with a lip that forms a cup around the callus for storing nectar, and pollinia that are dark and relatively small.  Universidad de Costa Rica 2015-08-05 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/20744 10.15517/lank.v15i2.20744 Lankesteriana: International Journal on Orchidology; 2015: Lankesteriana: Volumen 15, Número 2 Lankesteriana: International Journal on Orchidology; 2015: Lankesteriana: Volumen 15, Número 2 2215-2067 1409-3871 spa https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/20744/20893
institution	Universidad de Costa Rica
collection	Lankesteriana: International Journal on Orchidology
language	spa
format	Online
author	Neubig, Kurt M. Carlsward, Barbara S. Whitten, W. Mark Williams, Norris H.
spellingShingle	Neubig, Kurt M. Carlsward, Barbara S. Whitten, W. Mark Williams, Norris H. Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
author_facet	Neubig, Kurt M. Carlsward, Barbara S. Whitten, W. Mark Williams, Norris H.
author_sort	Neubig, Kurt M.
description	With approximately 200 species, the tribe Sobralieae is a dominant and common Neotropical group of orchids, yet little is known of variation in floral morphology as it relates to their pollination. As currently circumscribed, the tribe includes four genera that differ considerably in flower size and morphology: Elleanthus, Epilyna, Sertifera, and Sobralia. Although nectar-foraging pollinators are known for some species, the relationships of pollination to deceit and to nectar production are all poorly understood. We examined pollination-related of nectaries and nectar characteristics (presence/absence, volume, and concentration) for major clades of Sobralieae. Some species produce abundant nectar, but many species offer no reward. When present, nectar is secreted by thickened calli at the lip base. The cells of the nectariferous calli contain starch, which is rapidly converted to sugar during a brief anthesis (often lasting only one day). Most Sobralia flowers are relatively large, bee-pollinated, with a gullet-shaped lip, false nectary, large pollinia, and offer no reward. Elleanthus flowers are relatively small with a legitimate nectar reward, and most species are hummingbird- pollinated. Hummingbird-pollinated Sobralieae flowers are relatively small, brightly colored in the perianth and/or the subtending bracts, somewhat tubular, with a lip that forms a cup around the callus for storing nectar, and pollinia that are dark and relatively small.
title	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
title_short	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
title_full	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
title_fullStr	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
title_full_unstemmed	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
title_sort	nectary structure and nectar in sobralia and elleanthus (sobralieae: orchidaceae)
title_alt	Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)
publisher	Universidad de Costa Rica
publishDate	2015
url	https://revistas.ucr.ac.cr/index.php/lankesteriana/article/view/20744
work_keys_str_mv	AT neubigkurtm nectarystructureandnectarinsobraliaandelleanthussobralieaeorchidaceae AT carlswardbarbaras nectarystructureandnectarinsobraliaandelleanthussobralieaeorchidaceae AT whittenwmark nectarystructureandnectarinsobraliaandelleanthussobralieaeorchidaceae AT williamsnorrish nectarystructureandnectarinsobraliaandelleanthussobralieaeorchidaceae
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Nectary structure and nectar in Sobralia and Elleanthus (Sobralieae: Orchidaceae)

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