Describe the mechanism which limit inbreeding in plant

Means employed by plants to limit self-fertilization in plants

• Dichogamy: anthers mature and stigma become receptive at different times
  • Protandry: anther mature before the stigma
  • Protogyny: stigma mature before the anther
• Self-incompatibility: the pollen grain fails to develop on the stigma of the same flower.
• Special floral structure: most hermaphrodite flowers have structural features that favour cross pollination; e.g. stigma may be above the anthers thus removing the possibility of pollen falling on the stigma of the same flower. Other have nectar and good scent to attract pollinator.
• Inflorescence: having many flowers in close proximity on the same stalk favours cross pollination.
• Some plants have monoecious flower, i.e. separate male and female flowers on the same plant. e.g. maize and coconut.
• Some plants are dioecious, separate male and female flower of different plants.

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