Share this entry
pollen tube Line breaks: pol¦len tube

Definition of pollen tube in English:


A hollow tube which develops from a pollen grain when deposited on the stigma of a flower. It penetrates the style and conveys the male gametes to the ovule.
Example sentences
  • Guidance of the pollen tube down the style involves mechanical, chemical and physical cues that are not yet fully understood.
  • In pre-zygotic mechanisms, the pollen tube may grow as far as the ovule but not penetrate it, or penetration may be achieved without fertilization.
  • The grain is empty because the body cell and prothallial nuclei have moved out along the pollen tube towards the archegonia.
Definition of pollen tube in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove adverts and access premium resources