Fig. 3
From: Sporogenesis, gametophyte development and embryogenesis in Glehnia littoralis
The process of microsporogenesis and male gametophyte development. a ProphaseI. b MetaphaseI. c AnaphaseI. d TelophaseI. e ProphaseII. f MetaphaseII. g AnaphaseII. h TelophaseII. i-k Tetrad of microspores. l Free microspores. m Microspores that are further growth and development. n Mononuclear central phase. o Mononuclear edge phase. p Prophase of mitosis. q Metaphase of mitosis. r Anaphase of mitosis. s Telophase of mitosis. t Binuclear pollen grain. u Germ cell division. v, w Mature pollen grain with three nucleate. x Three germinal furrows. Gf: germinal furrow. Scale bar = 4 μm