Artículos de revistas
Elucidating The Mechanism Of Poricidal Anther Dehiscence In Miconia Species (melastomataceae)
Registro en:
Flora: Morphology, Distribution, Functional Ecology Of Plants. Urban Und Fischer Verlag Jena, v. 209, n. 10, p. 571 - 579, 2014.
3672530
10.1016/j.flora.2014.07.002
2-s2.0-84908500949
Autor
Cortez P.A.
Caetano A.P.S.
Carmello-Guerreiro S.M.
Teixeira S.P.
Institución
Resumen
Melastomataceae have porate anthers. However, unlike Solanaceae and many monocots, in which the poricidal dehiscence depends on the presence of a mechanical layer (often the endothecium), most members of Melastomataceae have no evident specialized layer related to the poricidal opening. The goal of this study was to characterize the tissues that form the apical pore of the anther in 10 Miconia species, which may help to understand the nearly unknown mechanism of anther dehiscence in this genus, considered to be one of the largest and most diverse New World genera. Before anthesis, the apical pores of all of the species are closed by a uniseriate epidermis, the cells of which lack a cuticle. In contrast, the epidermis of the remainder of the anther is covered by a thick, ornamented cuticle. Among Myrtales, the Melastomataceae form a clade with Alzateaceae, Crypteroniaceae and Penaeaceae, almost all of which have anthers with endothecium lacking wall thickenings. 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