53.
What is self-incompatibility? Why does self-pollination not lead to seed formation in self-incompatible species?
Self-incompatibility is the condition where the pollen fails to pollinate the stigma of the same flower or other flower of the same plants.
It is a genetic mechanism that prevents the self pollination by inhibiting the growth of pollen tube in the pistil. Therefore self pollination does not lead to fertilization and hence the seed formation in the self incompatible species.
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