1、The pollen tube entered into the embryo sac via one synergid.
花粉管經(jīng)由一個助細胞進入胚囊；

2、Pollen tube crawled at the stigmatic surface.
花粉管在柱頭內(nèi)逆行生長；

3、Research on soybean pollen tube pathway was carried out.
對大豆花粉管通道技術進行深入研究。

4、Pollen tube was very small.
花粉管細小或畸形；