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Autogamy and geitonogamy

Question

Autogamy and geitonogamy

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Solution

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

  1. Autogamy: In this type of self-pollination, the pollen from the anther of a flower is transferred to the stigma of the same flower. This can occur in closed flowers where the anthers and stigma are in close proximity to each other. Autogamy ensures that the plant can reproduce even in the absence of pollinators or other plants of the same species. However, it also reduces genetic diversity.

  2. Geitonogamy: This is the transfer of pollen from the anther of a flower to the stigma of another flower on the same plant. While this is technically a form of self-pollination because it involves a single plant, it is functionally more similar to cross-pollination because it requires a pollinator or the wind to transfer the pollen. Like autogamy, geitonogamy also reduces genetic diversity.

Both autogamy and geitonogamy are mechanisms that ensure reproduction in the absence of other plants of the same species or pollinators. However, they also limit genetic diversity, which can make the plant population more susceptible to diseases and less adaptable to environmental changes.

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