gametophytic self-incompatibility

Gametophytic self-incompatibility is a botanical mechanism that prevents a plant from fertilizing itself. This process relies on chemical signals within the plant. If pollen from the same plant lands on the stigma, it may fail to germinate or its pollen tube may not grow properly down the style, thus preventing fertilization.12

This self-incompatibility is genetically controlled and ensures cross-pollination, which combines hereditary traits from two parents. This genetic variability is advantageous for species survival in changing environments. While self-pollination can be foolproof in stable conditions, cross-pollination generally leads to more and better-quality seeds.12