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| Dos Santos Silveira,Conceição Eneida; Palhares,Dario; Barros,Karina; Pereira,Damasceno; Gomes Luís,Zanderluce; Rodrigues Pereira,Luiz Alfredo. |
| ABSTRACT Byrsonima basiloba Juss. is a fast growing shrub that produces edible and juicy fruits. This research studied the morphology and anatomy of seeds and seedlings. The hard endocarp was crested and triloculate, with one seed per locule. B. basiloba seed was composed of a testa and a tegmen with residual endosperm. The embryo was ivory, with long, foliaceous, circinate, anisophyllous cotyledons with disjointed apices. The embryonary axis was short, straight and occupied a small portion of the seed with short epicotyl, and radicle with a rudimentary root cap. In the seedlings, it was possible to differentiate the protoderm, procambium and ground meristem in the elongation zone. The differentiation process in this species occurred early in the embryo.... |
| Tipo: Journal article |
Palavras-chave: Seedling; Cotyledons; Endocarp; Amphistomy; Cerrado. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432016000200355 |
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| Biggelaar, J.A.M. van den; Edsinger-Gonzales, E.; Schram, F.R.. |
| Recent discoveries in the field of developmental genetics have lead to the resurrection of the old idea, first proposed in the early 19th century, that the dorso-ventral axis of deuterostomes, such as vertebrates, has been inverted during the course of evolution from that noted in protostomes, i.e., what in deuterostomes is dorsal, is in protostomes ventral. However, while attractive in its simplicity, such a suggestion ignores the real events of embryogenesis. During the onset of gastrulation in deuterostomes as well as in protostomes a blastopore is formed with exactly the same embryonic, antero-posterior/dorso-ventral polarity. Subsequent differences in the patterns or morphogenetic movement in gastrulation result in a spatial inversion of this... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Amphistomy; Axis inversion; Deuterostomes; Spiral cleavage; Protostomes; Gastrulation. |
| Ano: 2002 |
URL: http://www.repository.naturalis.nl/record/534350 |
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