Morphological and Anatomical Variations of Roots, Leaves, Peduncles, and Peduncle Bracts in the Vriesea oligantha Complex (Bromeliaceae): Perspectives for Taxonomy

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal Do Rio Grande Do Norte-
Autor(es): dc.creatorSilva, Kleber Resende [UNESP]-
Autor(es): dc.creatorVersieux, Leonardo M.-
Autor(es): dc.creatorOriani, Aline [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:49:41Z-
Data de disponibilização: dc.date.available2022-02-22T00:49:41Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1600/036364420X16033962925123-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207256-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207256-
Descrição: dc.descriptionVriesea is one of the genera of Bromeliaceae with the highest morphological diversity, including species of difficult recognition, many of them forming complexes, such as the Vriesea oligantha alliance. Morphological and anatomical comparative studies of vegetative and reproductive organs proved to be useful to solve such species complexes, besides indicating adaptive radiation.We analyzed comparatively the anatomy of roots, leaves, peduncles, and peduncle bracts of different populations found in rocky fields of Minas Gerais and Bahia, Brazil, with a taxonomic goal. In all the individuals studied the roots are composed of a velamen, a heterogeneous cortex, and a polyarch vascular cylinder, features that are common in the family. The leaves are covered by peltate trichomes and exhibit a hypodermis on both sides of the blade and a chlorenchyma composed of arm cells forming air lacunae between the collateral vascular bundles. The presence of subepidermal fiber strands in the leaves differentiates the populations ofMinas Gerais from those of Bahia. The peduncle has an atactostele with compactly arranged cells in the cortex and pith. The peduncle bracts exhibit a greater number of peltate trichomes on the abaxial surface and secretory channels occur in the mesophyll. A cluster analysis (UPGMA) based on leaf morphology and tank channel diameter generated a dendrogram with fourmain clusters, which correspond to V. lancifolia, V. oligantha, and V. pseudoligantha, plus another taxon. Intraspecific variations in the color and margin shape of leaves and peduncle bracts are interpreted as adaptive responses to environmental factors, mainly luminosity.-
Descrição: dc.descriptionPrograma de Pós-Graduac?o em Ciências BiolOgicas (Biologia Vegetal) Instituto de Biociências Universidade Estadual Paulista (UNESP), C. Postal 199, 13506900-
Descrição: dc.descriptionDepartamento de Botânica e Zoologia Centro de Biociências Universidade Federal Do Rio Grande Do Norte-
Descrição: dc.descriptionPrograma de Pós-Graduac?o em Ciências BiolOgicas (Biologia Vegetal) Instituto de Biociências Universidade Estadual Paulista (UNESP), C. Postal 199, 13506900-
Formato: dc.format779-793-
Idioma: dc.languageen-
Relação: dc.relationSystematic Botany-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectEpiphytes-
Palavras-chave: dc.subjectRocky fields-
Palavras-chave: dc.subjectTillandsioideae-
Palavras-chave: dc.subjectVriesea lancifolia-
Palavras-chave: dc.subjectVriesea pseudoligantha-
Título: dc.titleMorphological and Anatomical Variations of Roots, Leaves, Peduncles, and Peduncle Bracts in the Vriesea oligantha Complex (Bromeliaceae): Perspectives for Taxonomy-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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