The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.flora.2008.07.003 http://hdl.handle.net/11449/20334 |
Resumo: | Syngonanthus elegans flowers are distributed in capitula whose involucral bracts open and close in a diurnal rhythm. The anatomy of these bracts was studied to understand how such movements occur and how it influences reproductive ecology of the species. The involucral bracts have a single layered epidermis composed of thick-walled cells on the abaxial surface, which are responsible for the movement. Since they are hygroscopic, these cells swell when they absorb water from the surrounding environment, causing the bracts to bend and the capitula to close. In natural conditions, the capitula open by day, when temperature increases and the relative air humidity decreases, and close at night, when temperature decreases and the relative air humidity increases. The involucral bracts may thus protect the flowers from abiotic factors, exposing them only at the time of the day when temperature is higher and insects are more active, favoring pollination by small insects. The closed capitula do not only protect the flowers, but they also function as a shelter for floral visitors as Brachiacantha australe (Coccinellidae) and Eumolpini sp. (Chrysomelidae). These small Coleoptera pollinate the flowers of S. elegans during the day and remain within the closed capitula during the night, in a possible mutualistic relationship. (C) 2008 Elsevier GmbH. All rights reserved. |
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The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspectsSyngonanthus elegansEriocaulaceaeInvolucral bractsHygroscopic movementPollination biologyDiurnal inflorescence openingSyngonanthus elegans flowers are distributed in capitula whose involucral bracts open and close in a diurnal rhythm. The anatomy of these bracts was studied to understand how such movements occur and how it influences reproductive ecology of the species. The involucral bracts have a single layered epidermis composed of thick-walled cells on the abaxial surface, which are responsible for the movement. Since they are hygroscopic, these cells swell when they absorb water from the surrounding environment, causing the bracts to bend and the capitula to close. In natural conditions, the capitula open by day, when temperature increases and the relative air humidity decreases, and close at night, when temperature decreases and the relative air humidity increases. The involucral bracts may thus protect the flowers from abiotic factors, exposing them only at the time of the day when temperature is higher and insects are more active, favoring pollination by small insects. The closed capitula do not only protect the flowers, but they also function as a shelter for floral visitors as Brachiacantha australe (Coccinellidae) and Eumolpini sp. (Chrysomelidae). These small Coleoptera pollinate the flowers of S. elegans during the day and remain within the closed capitula during the night, in a possible mutualistic relationship. (C) 2008 Elsevier GmbH. All rights reserved.Univ Estadual Paulista, Dept Bot, Inst Biociencias, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista, Dept Bot, Inst Biociencias, BR-13506900 Rio Claro, SP, BrazilElsevier Gmbh, Urban & Fischer VerlagUniversidade Estadual Paulista (Unesp)Oriani, Aline [UNESP]Scatena, Vera Lucia [UNESP]2013-09-30T18:47:48Z2014-05-20T13:57:00Z2013-09-30T18:47:48Z2014-05-20T13:57:00Z2009-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject518-527http://dx.doi.org/10.1016/j.flora.2008.07.003Flora. Jena: Elsevier Gmbh, Urban & Fischer Verlag, v. 204, n. 7, p. 518-527, 2009.0367-2530http://hdl.handle.net/11449/2033410.1016/j.flora.2008.07.003WOS:0002696492000042454528048086769Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFlora1.3650,570info:eu-repo/semantics/openAccess2021-10-23T21:44:12Zoai:repositorio.unesp.br:11449/20334Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:11:45.466632Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
title |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
spellingShingle |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects Oriani, Aline [UNESP] Syngonanthus elegans Eriocaulaceae Involucral bracts Hygroscopic movement Pollination biology Diurnal inflorescence opening |
title_short |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
title_full |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
title_fullStr |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
title_full_unstemmed |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
title_sort |
The movement of involucral bracts of Syngonanthus elegans (Eriocaulaceae-Poales): Anatomical and ecological aspects |
author |
Oriani, Aline [UNESP] |
author_facet |
Oriani, Aline [UNESP] Scatena, Vera Lucia [UNESP] |
author_role |
author |
author2 |
Scatena, Vera Lucia [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Oriani, Aline [UNESP] Scatena, Vera Lucia [UNESP] |
dc.subject.por.fl_str_mv |
Syngonanthus elegans Eriocaulaceae Involucral bracts Hygroscopic movement Pollination biology Diurnal inflorescence opening |
topic |
Syngonanthus elegans Eriocaulaceae Involucral bracts Hygroscopic movement Pollination biology Diurnal inflorescence opening |
description |
Syngonanthus elegans flowers are distributed in capitula whose involucral bracts open and close in a diurnal rhythm. The anatomy of these bracts was studied to understand how such movements occur and how it influences reproductive ecology of the species. The involucral bracts have a single layered epidermis composed of thick-walled cells on the abaxial surface, which are responsible for the movement. Since they are hygroscopic, these cells swell when they absorb water from the surrounding environment, causing the bracts to bend and the capitula to close. In natural conditions, the capitula open by day, when temperature increases and the relative air humidity decreases, and close at night, when temperature decreases and the relative air humidity increases. The involucral bracts may thus protect the flowers from abiotic factors, exposing them only at the time of the day when temperature is higher and insects are more active, favoring pollination by small insects. The closed capitula do not only protect the flowers, but they also function as a shelter for floral visitors as Brachiacantha australe (Coccinellidae) and Eumolpini sp. (Chrysomelidae). These small Coleoptera pollinate the flowers of S. elegans during the day and remain within the closed capitula during the night, in a possible mutualistic relationship. (C) 2008 Elsevier GmbH. All rights reserved. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 2013-09-30T18:47:48Z 2013-09-30T18:47:48Z 2014-05-20T13:57:00Z 2014-05-20T13:57:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.flora.2008.07.003 Flora. Jena: Elsevier Gmbh, Urban & Fischer Verlag, v. 204, n. 7, p. 518-527, 2009. 0367-2530 http://hdl.handle.net/11449/20334 10.1016/j.flora.2008.07.003 WOS:000269649200004 2454528048086769 |
url |
http://dx.doi.org/10.1016/j.flora.2008.07.003 http://hdl.handle.net/11449/20334 |
identifier_str_mv |
Flora. Jena: Elsevier Gmbh, Urban & Fischer Verlag, v. 204, n. 7, p. 518-527, 2009. 0367-2530 10.1016/j.flora.2008.07.003 WOS:000269649200004 2454528048086769 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Flora 1.365 0,570 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
518-527 |
dc.publisher.none.fl_str_mv |
Elsevier Gmbh, Urban & Fischer Verlag |
publisher.none.fl_str_mv |
Elsevier Gmbh, Urban & Fischer Verlag |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129170410045440 |