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

单核期的小孢子出现壁良和巨大及空花粉现象。

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.

小孢子母细胞减数分裂胞分裂为同时型,产正四面型四分。

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

小孢子囊银杏的个，表明银杏的小孢子有性来源的性，小孢子囊银杏可能是一种奇特的嵌合。

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

每个孢子囊中有许多小孢子母细胞,它们各自经减数分裂后,产四个单倍的小孢子。

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

营养细胞的细胞中继续积累胼胝，花粉成熟对胼胝在小孢子形成和过程中的功能进行了讨论。

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，细胞分裂属同时型，产小孢子四分，为四面形。