pollen tubeBrE/ˈpɒlən tjuːb/NAmE/ˈpɑːlən tuːb/noun (biology生物) atubethatgrowswhenpollen lands on the of a flower to carry the male cell to the stigma of a flower to carry the male cell to the ovule(= apartofthefemaleorgan)ofaflowertocarrythemalecelltotheovule(= thepartthatcontainsthefemalecell)花粉管