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प्रश्न
Explain water pollination in detail with its types.
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उत्तर
Definition:
Pollination carried out by water is called hydrophily.
Two types of hydrophily:
i. Hypohydrophily:
- In this pollination occurs below the surface of the water.
- Here the pollen grains are heavier than water, thus they sink down and caught by stigmas of female flowers.
- For e.g. In Zostera (sea grass) the pollen grains are long, ribbon-like, and without exine.
ii. Epihydrophily:
- In this pollination occurs on the surface of the water.
- The pollen grains float on the water surface and reach the stigma of the female flower.
- Vallisneria is a submerged dioecious, fresh water aquatic plant. In this, female flowers reach the water surface temporarily to ensure pollination and male flowers float on the surface of the water.
- The specific gravity of these pollen grains is equal to that of water. Due to which they float on the surface of the water.
- Due to water currents, pollen grains are carried to stigma and pollination occurs.
संबंधित प्रश्न
With the help of a suitable example, explain protandry.
Give the floral adaptations for anemophily.
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
Name the two types of pollination.
Describe the Advantages and Disadvantages of self-pollination to the Plant.
Both chasmogamous and cleistogamous flowers are present in ______.
Feathery stigma occurs in ______.
Which of the following is not a water pollinated plant?
Pollination refers to the ______.
Mention any one example of the hydrophilous flower.
