Question

Name the part of gynoecium that determines the compatibility of pollen grains.

Hint:

Self-incompatibility prevents self-pollination; gametophytic type acts at the stigma, sporophytic in the style.

Answer 1

The stigma is the terminal receptive part of the gynoecium (pistil) that serves as the landing platform for pollen grains. It determines pollen compatibility through self-incompatibility mechanisms, such as S-locus genes, allowing only compatible pollen to germinate and grow pollen tubes into the style.