Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s00114-015-1320-5 http://hdl.handle.net/11449/178222 |
Resumo: | Colleters are secretory structures that produce and release mucilage or a mucilage-resin mixture protecting meristems and young structures against desiccation, herbivores, and pathogens. The secretions may vary in colleters of same or different types, indicating that the functionality of colleters may be more specific than previously thought. In this study, we compared 17 Rubiaceae species from savanna and forest environment focusing on colleter secretions and its ecological role. First, we evaluated the morphology, distribution, and histochemistry of stipular colleters using light and scanning electron microscopy. Additionally, we investigated the phenology, microclimate, and the proportion of damaged apices in the savanna and forest species. We recorded standard-type colleters, variable in distribution and size, in 14 of the 17 studied species. The secretion varied from predominantly hydrophilic, mixed to predominantly lipophilic. During the budding period, secretion covered the vegetative apices. Savanna species had a prevalence of lipid secretion in habitats with higher luminosity, which had a lower proportion of damaged apices. In contrast, forest species occurred in habitats with lower luminosity and had a higher proportion of damaged apices, in general with the absence of lipids in the colleters. These results highlight that colleters with similar morphology clearly differed in secretions among species, especially between species from savanna and forest, in which the colleters appear potentially associated with protection against irradiation in savanna, but not in the forest environment. |
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Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savannaApical meristemsColletersGlandsHistochemistryMicroclimatePhenologySecretionShoot apexColleters are secretory structures that produce and release mucilage or a mucilage-resin mixture protecting meristems and young structures against desiccation, herbivores, and pathogens. The secretions may vary in colleters of same or different types, indicating that the functionality of colleters may be more specific than previously thought. In this study, we compared 17 Rubiaceae species from savanna and forest environment focusing on colleter secretions and its ecological role. First, we evaluated the morphology, distribution, and histochemistry of stipular colleters using light and scanning electron microscopy. Additionally, we investigated the phenology, microclimate, and the proportion of damaged apices in the savanna and forest species. We recorded standard-type colleters, variable in distribution and size, in 14 of the 17 studied species. The secretion varied from predominantly hydrophilic, mixed to predominantly lipophilic. During the budding period, secretion covered the vegetative apices. Savanna species had a prevalence of lipid secretion in habitats with higher luminosity, which had a lower proportion of damaged apices. In contrast, forest species occurred in habitats with lower luminosity and had a higher proportion of damaged apices, in general with the absence of lipids in the colleters. These results highlight that colleters with similar morphology clearly differed in secretions among species, especially between species from savanna and forest, in which the colleters appear potentially associated with protection against irradiation in savanna, but not in the forest environment.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNESP-Univ Estadual Paulista, Caixa Postal 510Instituto de Biociências Departamento de Botânica USP-Universidade de São Paulo, Rua do Matão, 277Instituto de Biociências Departamento de Botânica UNESP Univ Estadual Paulista, CP 510UNESP-Univ Estadual Paulista, Caixa Postal 510Instituto de Biociências Departamento de Botânica UNESP Univ Estadual Paulista, CP 510FAPESP: 2008/55434-7FAPESP: 2011/02488-5CNPq: 473289/2010Universidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)Tresmondi, Fernanda [UNESP]Nogueira, AnselmoGuimarães, Elza [UNESP]Machado, Silvia Rodrigues [UNESP]2018-12-11T17:29:22Z2018-12-11T17:29:22Z2015-11-19info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1007/s00114-015-1320-5Science of Nature, v. 102.1432-19040028-1042http://hdl.handle.net/11449/17822210.1007/s00114-015-1320-52-s2.0-849833991522-s2.0-84983399152.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScience of Nature0,8370,837info:eu-repo/semantics/openAccess2023-12-20T06:23:30Zoai:repositorio.unesp.br:11449/178222Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:49:33.167983Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
title |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
spellingShingle |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna Tresmondi, Fernanda [UNESP] Apical meristems Colleters Glands Histochemistry Microclimate Phenology Secretion Shoot apex |
title_short |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
title_full |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
title_fullStr |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
title_full_unstemmed |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
title_sort |
Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna |
author |
Tresmondi, Fernanda [UNESP] |
author_facet |
Tresmondi, Fernanda [UNESP] Nogueira, Anselmo Guimarães, Elza [UNESP] Machado, Silvia Rodrigues [UNESP] |
author_role |
author |
author2 |
Nogueira, Anselmo Guimarães, Elza [UNESP] Machado, Silvia Rodrigues [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Tresmondi, Fernanda [UNESP] Nogueira, Anselmo Guimarães, Elza [UNESP] Machado, Silvia Rodrigues [UNESP] |
dc.subject.por.fl_str_mv |
Apical meristems Colleters Glands Histochemistry Microclimate Phenology Secretion Shoot apex |
topic |
Apical meristems Colleters Glands Histochemistry Microclimate Phenology Secretion Shoot apex |
description |
Colleters are secretory structures that produce and release mucilage or a mucilage-resin mixture protecting meristems and young structures against desiccation, herbivores, and pathogens. The secretions may vary in colleters of same or different types, indicating that the functionality of colleters may be more specific than previously thought. In this study, we compared 17 Rubiaceae species from savanna and forest environment focusing on colleter secretions and its ecological role. First, we evaluated the morphology, distribution, and histochemistry of stipular colleters using light and scanning electron microscopy. Additionally, we investigated the phenology, microclimate, and the proportion of damaged apices in the savanna and forest species. We recorded standard-type colleters, variable in distribution and size, in 14 of the 17 studied species. The secretion varied from predominantly hydrophilic, mixed to predominantly lipophilic. During the budding period, secretion covered the vegetative apices. Savanna species had a prevalence of lipid secretion in habitats with higher luminosity, which had a lower proportion of damaged apices. In contrast, forest species occurred in habitats with lower luminosity and had a higher proportion of damaged apices, in general with the absence of lipids in the colleters. These results highlight that colleters with similar morphology clearly differed in secretions among species, especially between species from savanna and forest, in which the colleters appear potentially associated with protection against irradiation in savanna, but not in the forest environment. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-11-19 2018-12-11T17:29:22Z 2018-12-11T17:29:22Z |
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 |
http://dx.doi.org/10.1007/s00114-015-1320-5 Science of Nature, v. 102. 1432-1904 0028-1042 http://hdl.handle.net/11449/178222 10.1007/s00114-015-1320-5 2-s2.0-84983399152 2-s2.0-84983399152.pdf |
url |
http://dx.doi.org/10.1007/s00114-015-1320-5 http://hdl.handle.net/11449/178222 |
identifier_str_mv |
Science of Nature, v. 102. 1432-1904 0028-1042 10.1007/s00114-015-1320-5 2-s2.0-84983399152 2-s2.0-84983399152.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Science of Nature 0,837 0,837 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
Scopus 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 |
|
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1808129255450607616 |