Fig. 2

Megagametogenesis of Polianthes tuberosa var. Simple. a Linear tetrad. The three closest cells to the micropylar extreme are degenerating. b Functional megaspore. c First mitotic division. d Embryo sac with four nuclei. e and f Third mitotic division of the embryo sac with eight nuclei. cm chalazal megaspore, fm functional megaspore, dm degenerating megaspores, v vacuole, a antipodal cells, ea egg apparatus, mpn micropylar polar nucleus, cpn chalazal polar nucleus, n1, n2 and n3 cells that will form the egg apparatus, c chalaza, m micropyle, arrow heads in (a) megaspores being degraded, arrow heads in (c) primary chalazal and micropylar nuclei, arrow head in (d) nuclei produced by the second meiotic division of the embryo sac, arrow heads in (e) and (f) cytoplasmic filaments. Bars 10 µm