Leaf architecture of Rubiaceae Juss. from caatinga vegetation in Brazil
The study and characterization of leaf venation plays a key role in the recognition of taxonomic groups that have been identified mainly based on reproductive traits. This study aimed at characterizing the pattern of leaf venation of Rubiaceae, recognizing individual characters among the taxa of thi...
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Veröffentlicht in: | Biota Neotropica 2019-01, Vol.19 (1), p.1-7 |
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Sprache: | eng |
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Zusammenfassung: | The study and characterization of leaf venation plays a key role in the recognition of taxonomic groups that have been identified mainly based on reproductive traits. This study aimed at characterizing the pattern of leaf venation of Rubiaceae, recognizing individual characters among the taxa of this group and testing the use of leaf architecture as a taxonomic tool capable of providing vegetative and diagnostically characteristics between species. Leaves of 14 species distributed in eight genera from Rubiaceae were diaphanized and classified. The study area is located in Área de Proteção Ambiental Serra Branca/Raso da Catarina, Bahia State, Brazil. The characterization of secondary veins, including type, spacing and number of pairs, third veining patterns, fourth and fifth order, and the conformation of the areola were useful to delimit taxa when used together, providing subsidies to more comprehensive studies.
Resumo: O estudo e a caracterização da venação foliar representam uma possibilidade no reconhecimento de grupos taxonômicos, identificados predominantemente com base em caracteres reprodutivos. O presente estudo objetivou caracterizar o padrão de nervação foliar de Rubiaceae, reconhecer caracteres particulares dentre os táxons deste grupo e testar a utilização da arquitetura foliar como ferramenta taxonômica capaz de fornecer características diagnósticas vegetativas entre as espécies. Foram diafanizadas e classificadas as folhas de 14 espécies distribuídas em 8 gêneros de Rubiaceae na APA Serra Branca/Raso da Catarina. A caracterização das nervuras secundárias, incluindo tipo, espaçamento e número de pares, padrões de nervuras de terceira, quarta e quinta ordem, bem como a conformação das aréolas foram úteis para delimitar os táxons quando utilizados em conjunto, fornecendo subsidío para estudos mais abrangentes. |
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ISSN: | 1806-129X 1676-0611 1676-0611 1676-0603 |
DOI: | 10.1590/1676-0611-bn-2017-0473 |