Artículos de revistas
Development And Cytology Of Pollen In Dahlstedtia Malme (leguminosae: Papilionoideae)
Registro en:
Botanical Journal Of The Linnean Society. , v. 138, n. 4, p. 461 - 471, 2002.
244074
10.1046/j.1095-8339.2002.00031.x
2-s2.0-0036526213
Autor
De Padua Teixeira S.
Forni-Martins E.R.
Taroda Ranga N.
Institución
Resumen
Microsporogenesis, chromosome number, meiotic behaviour and meiotic index were investigated in Dahlstedtia pinnata and D. pentaphylla, two legume species occurring largely in Brazil, in order to ascertain whether the pollen could limit fertilization events. Archesporial cells originate primary sporogenous and anther wall precursor cells, the tapetum is uniseriate, uninucleate and glandular. Tetrads are tetrahedric or decussate, and cytokinesis is of the simultaneous type. Mature pollen grains are tricolpate and bicellular. No abnormalities in microsporogenesis were found. In both species the chromosome number is n = 11, a number not reported previously. The base number for Dahlstedtia is also 11, because cytological observations include both species of Dahlstedtia. D. pentaphylla has a higher meiotic index and lower individual variation values, and it is considered meiotically stable. Its pollen grains do not limit fertilization. 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