A serologic reaction retards the growth of the pollen tube.

血清反应阻止花粉管生长.

辞典例句

Pollen tube entered the embryo sac via one synergid and in it released two sperms.

花粉管经由一个助细胞进入胚囊,并在助细胞中释放两个精子.

期刊摘选

Cortical microtubules and spiny vesicles appear in the cytoplasm after germination of the pollen tube.

花粉萌发后,细胞质中出现周质微管和被刺小泡,此期细胞器的变化不明显.

期刊摘选