tetrads

stamens 10, sometimes with spurs or awns, dehiscing by pores, pollen in tetrads, rarely single.

雄蕊10，有时有距或者芒，孔裂，花粉为四分体，很少单体。

The meiosis behavior of pollen mother cell of sterile plant was normal and tetrads were formed. However degradation of tetrad callose wall was abnormal.

不育株花粉母细胞减数分裂过程基本正常，可形成四分体，但四分体胼胝质壁不能适时解体，小孢子或于胼胝质壁内彻底败育解体，或发育至单核中期败育；

pollen tetrads in masses, solitary in each anther cell, pollen carriers spatulate, erect.

在群众内四合花粉，单生在内每花药室，花粉搬运工，直立。

Hypertrophy and hyperplasia of tapetum at tetrads stage were related to pollen abortion.

四分体时期绒毡层肥大增厚可能与花粉败育有关。

Super-microspore happened in the 5 % ~30 % or more tetrads and its formation was directly concerned with B-chromosome.

四分体中额外小孢子的形成与B - 染色体直接有关,其频率为5%～30%或更高.

The tetrads are linear, few triads.

四分体线形，少数三分体。

The tetrads eventually shrivel or are resorbed.

这种四分体最终萎缩或被再吸收.

Cytokinesis is of the simultaneous type and microspore tetrads are mainly tetrahedral.

小孢子母细胞减数分裂为同时型.