Definitions [3]
Define Pollination.
Transfer of pollen grains from the anther to stigma is called pollination.
Definition: Self-pollination
When pollination occurs within the same flower or between two flowers on the same plant, it is called self-pollination.
or
Transfer of pollen grains from the anther to the stigma of the same flower or another flower on the same plant is said to be self~pollination.
Definition: Cross-pollination
When pollination occurs between flowers on two different plants of the same species, it is called cross-pollination.
or
Transfer of pollen grains from the anther of a flower from one plant to the stigma of the flower on another plant is called cross-pollination
Key Points
Key Points: Cross-pollination
- Cross-pollination is the transfer of pollen grains from the anther of one plant to the stigma of another plant of the same species.
- It is also known as Allogamy, while Xenogamy refers specifically to pollination between different plants.
- Cross-pollination usually occurs with the help of external agents such as wind, water, insects, birds, and animals.
- This type of pollination produces genetically varied, healthier, and more adaptable offspring.
- Cross-pollination helps in the development of new plant varieties and improves crop quality and vigour.
- It requires the production of a large number of pollen grains, leading to wastage and dependence on pollinating agents.
