Please use this identifier to cite or link to this item:
Type: Artigo
Title: Anatomical development of the pericarp and seed of Oncidium flexuosum Sims (ORCHIDACEAE)
Author: Sampaio Mayer, Juliana Lischka
Carmello-Guerreiro, Sandra Maria
Appezzato-da-Gloria, Beatriz
Abstract: Interpretation of the anatomical structure of the ovary and fruit of the Orchidaceae family is still controversial, which makes it difficult to understand the development and dehiscence of the fruit. The genus Oncidium is polyphyletic and is currently the subject of taxonomic studies. In this study, we have investigated the anatomical development of the pericarp and seed of Oncidium flexuosum Sims to determine important diagnostic characters that, along with molecular data, can assist in defining this group. We have found a new anatomical characteristic of the family: the presence of precursor cells for fruit dehiscence, which were visible from the beginning of development and located on the outer walls of the sterile valves. In contrast with what has been observed by different authors with other species, in the mature fruit of O. flexuosum, only the endocarp of the fertile valves and a few cells near the exocarp and the vascular bundle in the sterile valves show parietal thickening, while the rest remains parenchymatous. During the development of the ovule and embryo, we have shown that the embryonic sac of this species has eight nuclei and that the embryo has a long and elaborate suspensor
Subject: Orquídea
Country: Alemanha
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.flora.2011.01.009
Date Issue: 2011
Appears in Collections:IB - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
000292491700010.pdf2.79 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.