Fig. 3. Male gametophyte development in pineapple.

A–J DIC observations of semithin section of anthers at the pollen mother cell (A, F), tetrad (B, G), mononuclear pollen (C, H), bicellular pollen (D, I) and tricellular pollen (E, J) stages. K–P. Chromosome spreading of pollen mother cells undergoing meiosis at the leptatene (K), zygotene (L), pachytene (M), late diplotene and diakinesis (N), metaphase I (O) and telophase I (P) stages. Red arrowheads indicate the male gametophyte nucleus. A–J, Bars = 20 μm, K–P, Bars = 5 μm