Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/77407
Type: Artigo de periódico
Title: Anatomy of vegetative organs with an emphasis on the secretory structures of two species of Aldama (Asteraceae-Heliantheae)
Author: Oliveira, T
Bombo, AB
Appezzato-Da-Gloria, B
Abstract: Aldama arenaria (Baker) E.E. Schill. & Panero and Aldama robusta (Gardner) E.E. Schill. & Panero are aromatic plants, morphologically very similar and usually confused on the analysis of exsiccates. The present study aimed to identify the secretory structures present in vegetative organs and to survey for anatomical features with diagnostic value between A. arenaria and A. robusta based on an examination of these organs. Aldama arenaria and A. robusta exhibit hydathodes in the dentate ornamentations of the leaf margins and apices in addition to glandular trichomes, secretory cavities and ducts, all of which vary with respect to type and location in each species. Xylopodia and adventitious roots constitute the underground system. The xylopodium is covered by epidermis or by suberised cells resulting from periclinal divisions of parenchyma cells. The tuberisation process of adventitious roots results mainly from hypertrophy and hyperplasia of medullary cells, especially in A. arenaria. Through anatomical analysis, useful features for distinction between A. arenaria and A. robusta in exsiccates and fresh materials were identified, and these features were related mainly to the position and frequency of secretory structures.
Subject: Aldama La Llave
Compositae
cavities
ducts
glandular trichomes
hydathodes
tuberous roots
Country: Canadá
Editor: Canadian Science Publishing, Nrc Research Press
Rights: fechado
Identifier DOI: 10.1139/cjb-2012-0271
Date Issue: 2013
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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