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

单核期小孢子出现壁发育不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.

小孢子母细减数质为同时型,产生正四面型四。

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

叶生小孢子囊银杏发生，表明银杏小孢子叶有叶性来源性质，叶生小孢子囊银杏可能是一种奇特嵌合。

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

每孢子囊中有许多小孢子母细,它们各自经减数后,产生四单倍小孢子。

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

营养细细质中继续积累胼胝质，花粉成熟对胼胝质在小孢子形成和发育过程中功能进行了讨论。

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

花粉母细行减数，细质属同时型，产生小孢子四，为四面形。