Difference between Autogamy and Geitonogamy.

Autogamy and geitonogamy are two different types of self-fertilization in plants.

1. Autogamy:

   • Autogamy refers to the process of self-fertilization within a single flower.
   • In autogamy, the pollen from the anther of a flower is transferred to the stigma of the same flower.
   • This can occur due to various mechanisms such as the bending of the flower's reproductive organs or the release of pollen onto the stigma.
   • Autogamy is a relatively rare phenomenon in plants, as most plants have mechanisms to prevent self-fertilization in order to promote genetic diversity.

2. Geitonogamy:

   • Geitonogamy, on the other hand, refers to the process of self-fertilization between different flowers on the same plant.
   • In geitonogamy, the pollen from the anther of one flower is transferred to the stigma of another flower on the same plant.
   • This can occur through various means such as wind, insects, or other pollinators.
   • Geitonogamy is more common than autogamy in plants, as it allows for some level of genetic diversity while still ensuring successful fertilization.

In summary, autogamy involves self-fertilization within a single flower, while geitonogamy involves self-fertilization between different flowers on the same plant.