pollen tube造句

1、The pollen tube entered into the embryo sac via one synergid.
花粉管经由一个助细胞进入胚囊；

2、Pollen tube crawled at the stigmatic surface.
花粉管在柱头内逆行生长；

3、Research on soybean pollen tube pathway was carried out.
对大豆花粉管通道技术进行深入研究。

4、Pollen tube was very small.
花粉管细小或畸形；