explain in detail the process of pollination in plants with a diagram?

Asked by pr_prashant | 27th Nov, 2010, 05:01: PM

Expert Answer:

Dear Student,
 
Flowering plants have several different parts that are important in pollination. Flowers have male parts called stamens that produce a sticky powder called pollen. Flowers also have a female part called the pistil. The top of the pistil is called the stigma, and is often sticky. Seeds are made at the base of the pistil, in the ovule.

To be pollinated, pollen must be moved from a stamen to the stigma. When pollen from a plant's stamen is transferred to that same plant's stigma, it is called self-pollination. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants.

An anther is the male part of a flower that has pollen grains on it. A stigma is the female part of a flower that receives the pollen. 

Each tiny pollen grain grows into a long tube. These are called pollen tubes. They grow until they come to the ovary. The ovary is the section of a flower where the pollen tubes meet. Now a male gamete from the pollen tube joins the egg from the ovary and a seed is born.

 Pollen grains may be carried to the stigma of flower by wind, insects, or by animals, or it may originate inside the same flower itself.


We hope that clarifies your query.
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Answered by  | 27th Nov, 2010, 10:46: PM

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