Morphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savanna

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dc.contributor.authorTresmondi, Fernanda [UNESP]
dc.contributor.authorNogueira, Anselmo
dc.contributor.authorGuimarães, Elza [UNESP]
dc.contributor.authorMachado, Silvia Rodrigues [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:29:22Z
dc.date.available2018-12-11T17:29:22Z
dc.date.issued2015-11-19
dc.description.abstractColleters 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.en
dc.description.affiliationUNESP-Univ Estadual Paulista, Caixa Postal 510
dc.description.affiliationInstituto de Biociências Departamento de Botânica USP-Universidade de São Paulo, Rua do Matão, 277
dc.description.affiliationInstituto de Biociências Departamento de Botânica UNESP Univ Estadual Paulista, CP 510
dc.description.affiliationUnespUNESP-Univ Estadual Paulista, Caixa Postal 510
dc.description.affiliationUnespInstituto de Biociências Departamento de Botânica UNESP Univ Estadual Paulista, CP 510
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2008/55434-7
dc.description.sponsorshipIdFAPESP: 2011/02488-5
dc.description.sponsorshipIdCNPq: 473289/2010
dc.identifierhttp://dx.doi.org/10.1007/s00114-015-1320-5
dc.identifier.citationScience of Nature, v. 102.
dc.identifier.doi10.1007/s00114-015-1320-5
dc.identifier.file2-s2.0-84983399152.pdf
dc.identifier.issn1432-1904
dc.identifier.issn0028-1042
dc.identifier.scopus2-s2.0-84983399152
dc.identifier.urihttp://hdl.handle.net/11449/178222
dc.language.isoeng
dc.relation.ispartofScience of Nature
dc.relation.ispartofsjr0,837
dc.relation.ispartofsjr0,837
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectApical meristems
dc.subjectColleters
dc.subjectGlands
dc.subjectHistochemistry
dc.subjectMicroclimate
dc.subjectPhenology
dc.subjectSecretion
dc.subjectShoot apex
dc.titleMorphology, secretion composition, and ecological aspects of stipular colleters in Rubiaceae species from tropical forest and savannaen
dc.typeArtigo

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