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

单核期的小孢出现壁发育不良和巨大及现象。

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

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.

营养细胞的细胞质中继续积累胼胝质，对胼胝质在小孢形和发育过程中的功能进行了讨论。

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

叶生小孢囊银杏的个体发生，表明银杏的小孢叶有叶性来源的性质，叶生小孢囊银杏可能是一种奇特的嵌合体。

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,产生四个单倍体的小孢。

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。