Question

All the events from pollen deposition on the stigma until pollen tubes enter the ovules are together referred to as

Answer 1

Pollen-pistil interaction is the recognition interaction between stigma and landed pollen based on which the pollen is accepted or rejected.

Stigma accepts or rejects the pollen depending upon the compatibility.

Acceptance of pollen leads to development of pollen tube and fertilisation. Rejection of pollen prevents fertilisation.