Stigma Damage Impact on Flower Reproduction
The stigma is the receptive tip of a flower's pistil, responsible for catching pollen during pollination.
Pollination is the essential first step in sexual reproduction for many plants, involving the transfer of pollen to the stigma.
If the stigma is damaged, it cannot effectively receive pollen grains. This directly impairs the process of pollination.
Following successful pollination, pollen germinates on the stigma, leading to fertilisation – the fusion of male and female gametes. Without effective pollination due to a damaged stigma, fertilisation cannot occur.
Why Other Processes Are Unaffected
- Fruit ripening occurs after fertilisation and seed development.
- Seed dispersal happens much later, once seeds have matured.
- The formation of petals and sepals takes place during the earlier development stages of the flower bud, before the reproductive phase begins.
Therefore, damage to the stigma primarily affects pollination and fertilisation.
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