The big,empty and abortive pollen grains are abserred at the stage of uninuclear microspore.

单期小孢出现壁发育不良和巨大及空花粉现象。

Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

花粉母细胞行减数分裂，细胞质分裂属同时型，产生小孢四分体，为四面体形。

These results indicate that callose metabolism is active and very important not only in microsporogenesis but also in microgametogenesis in rice.

营养细胞细胞质中继续积累胼胝质，花粉成熟对胼胝质在小孢形成和发育过程中进行了讨论。

The ontogeny of epiphyllous microsporangia Ginkgo indicated that the microsporophyll in Ginkgo is of phyllome origin.Possibly, the epiphyllous microsporangia is a peculiar chimera.

叶生小孢囊银杏个体发生，表明银杏小孢叶有叶性来源性质，叶生小孢囊银杏可是一种奇特嵌合体。

There are a lot of sporule mother cells in every sporangium, they are respective via meiosis hind, produce the sporule of 4 monoploid.

每个孢囊中有许多小孢母细胞,它们各自经减数分裂后,产生四个单倍体小孢。

Ubisch bodies and lipid bodies are found in the glandular tapetums. In meiosis of microsporocyte, cytokinesisis is a simultaneous type, which produces an isobilateral tetrad.

小孢母细胞减数分裂胞质分裂为同时型,产生正四面体型四分体。