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Morphological and anatomical features of the flowers and fruits during the development of Chamissoa altissima (Jacq.) Kunth (Amaranthaceae)
The morphology and structure of the flowers and fruits of Chamissoa altissima (Jacq.) Kunth during the development were analyzed. The plant material was fixed in FAA 50, embedded in historesin and sectioned according to standard techniques. The flowers presented tepals with betalain and homogeneous...
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Published in: | Brazilian archives of biology and technology 2010-12, Vol.53 (6), p.1425-1432 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The morphology and structure of the flowers and fruits of Chamissoa altissima (Jacq.) Kunth during the development were analyzed. The plant material was fixed in FAA 50, embedded in historesin and sectioned according to standard techniques. The flowers presented tepals with betalain and homogeneous mesophyll; receptacular nectary; anthers with epidermis, endothecium, one middle layer, and uninucleate tapetum; and monocarpelar ovary with homogeneous mesophyll. The fruit was a circumscissile capsule, presented the same number of cellular layers that the ovary, and possessed subendocarpic sclerenchyma. The seed was bitegmic, exotestal and perispermic.
Chamissoa altissima (Jacq.) Kunth ocorre em remanescentes florestais de Maringá, Paraná, Brasil e se destaca por seus frutos zoocóricos envolvidos por sépalas vermelhas. As flores e frutos em diferentes fases de desenvolvimento são descritos estruturalmente. O material botânico foi fixado em FAA 50, emblocado em historresina e secionado conforme técnicas usuais. As flores apresentam sépalas com betalaína e mesofilo homogêneo; nectário receptacular; anteras com epiderme, endotécio, uma camada média e tapete uninucleado; e ovário monocarpelar com mesofilo homogêneo. O fruto é uma cápsula circuncisa, apresenta o mesmo número de camadas celulares que o ovário, e possui esclerênquima subendocárpico. A semente é bitegumentada, exotestal e perispérmica. |
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ISSN: | 1516-8913 1516-8913 1678-4324 |
DOI: | 10.1590/S1516-89132010000600019 |