MORFOLOGIA DOS FRUTOS, SEMENTES E PLÂNTULAS DE Platonia insignis MART. (CLUSIACEAE). II. MORFO-ANATOMIA DOS FRUTOS E SEMENTES MADUROS

Abstract

, Celia Massa BELTRAT1 3 RESUMO -O fruto de Platonia insignis é uma baga uniloculada cuja forma varia de oblata a oblonga. O exocarpo é unisseriado; o mesocarpo é parenquimático, contendo numerosos dutos secretores e feixes vasculares ramificados; o endocarpo constitui a camada pulposa que envolve as sementes no fruto maduro, quando se destaca do restante do pericarpo. As camadas celulares mais internas do endocarpo são radialmente alongadas e permanecem firmemente aderidas às camadas mais externas da testa, por meio de interdigitações. As sementes são anátropas e se tornam unitegumentadas e exalbuminosas. A testa é multisseriada e apresenta numerosos feixes vasculares que partem do feixe rafeal único como ramos pós-calazais; o tégmen encontra-se colapsado, sendo distintos apenas alguns braquisclereídes dispersos. O embrião, do tipo conferruminado, consta de um espesso eixo hipocótilo-radícula, rico em reservas lipídicas, em cujo meristema fundamental estão presentes abundantes dutos secretores. Palavras-chave:Platonia insignis Mart.; fruto e semente maduros. Fruit, Seed and Seedling Morphology of Platonia insignis Mart. (Clasiaceae). II MorphoAnatomy of Mature Fruits and Seeds.SUMMARY -The fruit of Platonia insignis is an unilocular berry; oblate to oblong in shape. The exocarp is uniseriate; the mesocarp is parenchymatic, with branched secretory ducts and vascular bundles. At maturation, the endocarp constitutes the pulpy layer which involves the seed, when it is released from the rest of the pericarp; the inner endocarp cell layers are radially elongated and remain firmly attached to the testai outer layers. The mature seeds are anatropous, becoming unitegmic and exalbuminous; the testa is multiseriate and shows a single rapheal vascular bundle with many postchalazal branches; the tegmen is almost completly crushed, showing only some scattered brachisclereids. The conferruminate embryo is constituted by a thick radiclehypocotyl axis which is rich in lipids. Secretory ducts occur in the fundamental cortical meristem of the embrionary axis.

Morphology and anatomy of developing fruits and seeds of Vismia guianensis (Aubl.) Choisy (Clusiaceae)

“…The occurrence of lipids substances in seeds of species of the family Clusiaceae is widely registered in the literature (Brandza, 1908;Earle & Jones, 1962;Vaughan, 1970;Basta & Basta, 1984;Bentes et al, 1986/87;Adeyeye, 1991;Mourão & Beltrati, 1995b). In the present study it was verified that the main reservation substance that occurs in the embryo of V. guianensis is of lipids nature.…”

Postharvest changes and respiratory pattern of bacuri fruit (Platonia insignis Mart.) at different maturity stages during ambient storage

“…Higher weight losses for bacuri fruit at immature stages were also reported by Teixeira et al (2001). This trend can be related to thick wax deposition on the exocarp, which provides good protection against excessive moisture loss (Mourão & Beltrati, 1995).…”

Soluble and Insoluble Fiber in Some Amazonian Fruits with Low Energy Density

“…It contains from one to five seeds surrounded by the endocarp, which is the edible part of the fruit [10]- [12]. The exocarp of the fruits varies widely, not only in size and color, but also in acidity.…”