单核花粉粒

单核花粉粒在一昼夜中的发生频率与花药长短有关，3～4mm的高于4～5mm的；

The freguency of monocyte pollen grain in a day and night has relation to the length of anther , it 's 3 ~ 4mm > 4 ~+ 5mm .

MS-4花粉败育的时期，是在小孢子四分体分开至单核花粉粒时期。

Pollen abortion of MS-4 was in the single nucleus pollen grain stage after the division of microspore tetrad .

8单核花粉粒期；

Single nuclear pollen grains phase ;

但当单核花粉粒形成之后，长花药与圆花药中的发育速度基本一致。

After uninuclear pollen grain forms , the growing speed of the pollen grain of oblong anthers and of globose anthers roughlg corresponds to each other .

单核花粉粒时期，绒毡层细胞质浓厚，细胞间间隙小，与中层细胞联系紧密，没有解体。

At the stage of single nucleus pollen , tapetum cells were showed to possess dense cytoplasm , join with its conjoint cell with little space , connect with middle cell closely and not disaggregate .