The size of two minutes when the form is called small microspores, is a product of unequal division. The first cell of male gametophyte, the haploid male reproductive cells, often referred to as mononuclear cell pollen.
microspore The microspore
In 32 or 64 microspores, germination form extremely degraded by several Cells
A male Prothallus
. Aquatic fern Salvinia natans
(Salvinia natans), Manjianghong
(Azol-la imbricata) microspore germination in the microspore sac, produced by four Vegetative cells
, two The sperm is
The male prothallus which, due to the growth of the pressure of the spore wall rupture and part exposed. Also refers to the brief and important stage of higher plant life history Zhongxiong gametophyte development process of mononuclear cells after meiosis four split release.
Super microspore head
in addition Angiosperm
and Gymnosperms Anther
In the pollen Four split
Also known as the future development of microspore, the same as the male prothallus. Pollen
Therefore, it is equivalent to the microspore ferns.