Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://dx.doi.org/10.1007/s00606-002-0204-2 http://www.locus.ufv.br/handle/123456789/22238 |
Resumo: | The floral morphology of seven Oxypetalum species and, in particular, the spatial relationship between the five stigmatic chambers and two separate ovaries of their flowers with respect to transmission of the pollen tube are studied. In all species, except O. banksii subsp. banksii, floral morphology is similar to that in other Asclepiadeae, and the flowers pollinated with one pollinium develop only one follicle, which means compitum absence. In O. banksii subsp. banksii flowers, the secretory interstaminal tissue lines the inner walls of the stigmatic chambers as in the other species studied, but it also reaches the upper part of the inner surface of the filament tube, where it surrounds the styles, an unprecedented feature for Asclepiadaceae. This tissue secretes nectar and mucilage; the latter acts as transmitting medium for the growth of pollen tubes from pollinia inserted and hydrated in stigmatic chambers (“hyperstigmas”). Mucilage also functions as an extragynoecial compitum: in flowers pollinated with one pollinium both carpels develop into a follicle. |
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2145 |
spelling |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitumCompitumFloral morphologyHyper- stigmaOxypetalumPollen tube pathwayThe floral morphology of seven Oxypetalum species and, in particular, the spatial relationship between the five stigmatic chambers and two separate ovaries of their flowers with respect to transmission of the pollen tube are studied. In all species, except O. banksii subsp. banksii, floral morphology is similar to that in other Asclepiadeae, and the flowers pollinated with one pollinium develop only one follicle, which means compitum absence. In O. banksii subsp. banksii flowers, the secretory interstaminal tissue lines the inner walls of the stigmatic chambers as in the other species studied, but it also reaches the upper part of the inner surface of the filament tube, where it surrounds the styles, an unprecedented feature for Asclepiadaceae. This tissue secretes nectar and mucilage; the latter acts as transmitting medium for the growth of pollen tubes from pollinia inserted and hydrated in stigmatic chambers (“hyperstigmas”). Mucilage also functions as an extragynoecial compitum: in flowers pollinated with one pollinium both carpels develop into a follicle.Plant Systematics and Evolution2018-10-10T16:59:54Z2018-10-10T16:59:54Z2002-10-14info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf21996881http://dx.doi.org/10.1007/s00606-002-0204-2http://www.locus.ufv.br/handle/123456789/22238engv. 233, n. 3– 4, p. 199– 206, out. 2002Springer Nature Switzerland AG.info:eu-repo/semantics/openAccessVieira, M. F.Shepherd, G. J.reponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T07:55:44Zoai:locus.ufv.br:123456789/22238Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:55:44LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
title |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
spellingShingle |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum Vieira, M. F. Compitum Floral morphology Hyper- stigma Oxypetalum Pollen tube pathway |
title_short |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
title_full |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
title_fullStr |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
title_full_unstemmed |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
title_sort |
Oxypetalum banksii subsp. banksii: a taxon of Asclepiadaceae with an extragynoecial compitum |
author |
Vieira, M. F. |
author_facet |
Vieira, M. F. Shepherd, G. J. |
author_role |
author |
author2 |
Shepherd, G. J. |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Vieira, M. F. Shepherd, G. J. |
dc.subject.por.fl_str_mv |
Compitum Floral morphology Hyper- stigma Oxypetalum Pollen tube pathway |
topic |
Compitum Floral morphology Hyper- stigma Oxypetalum Pollen tube pathway |
description |
The floral morphology of seven Oxypetalum species and, in particular, the spatial relationship between the five stigmatic chambers and two separate ovaries of their flowers with respect to transmission of the pollen tube are studied. In all species, except O. banksii subsp. banksii, floral morphology is similar to that in other Asclepiadeae, and the flowers pollinated with one pollinium develop only one follicle, which means compitum absence. In O. banksii subsp. banksii flowers, the secretory interstaminal tissue lines the inner walls of the stigmatic chambers as in the other species studied, but it also reaches the upper part of the inner surface of the filament tube, where it surrounds the styles, an unprecedented feature for Asclepiadaceae. This tissue secretes nectar and mucilage; the latter acts as transmitting medium for the growth of pollen tubes from pollinia inserted and hydrated in stigmatic chambers (“hyperstigmas”). Mucilage also functions as an extragynoecial compitum: in flowers pollinated with one pollinium both carpels develop into a follicle. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-10-14 2018-10-10T16:59:54Z 2018-10-10T16:59:54Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
21996881 http://dx.doi.org/10.1007/s00606-002-0204-2 http://www.locus.ufv.br/handle/123456789/22238 |
identifier_str_mv |
21996881 |
url |
http://dx.doi.org/10.1007/s00606-002-0204-2 http://www.locus.ufv.br/handle/123456789/22238 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
v. 233, n. 3– 4, p. 199– 206, out. 2002 |
dc.rights.driver.fl_str_mv |
Springer Nature Switzerland AG. info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Springer Nature Switzerland AG. |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
pdf application/pdf |
dc.publisher.none.fl_str_mv |
Plant Systematics and Evolution |
publisher.none.fl_str_mv |
Plant Systematics and Evolution |
dc.source.none.fl_str_mv |
reponame:LOCUS Repositório Institucional da UFV instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
LOCUS Repositório Institucional da UFV |
collection |
LOCUS Repositório Institucional da UFV |
repository.name.fl_str_mv |
LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
fabiojreis@ufv.br |
_version_ |
1822610674318049280 |