LEARNit Dictionary
pollen tube
noun
/ˈpɒlən tjuːb/
UK
/ˈpɑːlən tuːb/
US
1
a tube that grows when pollen lands on the stigma(= a part of the female organ) of a flower to carry the male cell to the ovule(= the part that contains the female cell)
لولهٔ گرده, لوله گرده