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प्रश्न
Does self incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants.
उत्तर
Self-incompatibility imposes restriction to autogamy. The device to prevent inbreeding is self-incompatibility or self-sterility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Self-incompatiblity is overcome by mixed pollination.
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संबंधित प्रश्न
Write a brief account on pollination.
Higher Order Question.
What will happen if pollen grain of rose gets deposited on stigma of lily flower? Will pollen germination takes place? Why?
Assertion: Pollination and fertilization in flowers produce fruits and seeds.
Reason: After fertilization the ovary becomes fruit and ovule becomes seed.
In ______, both autogamy and geitonogamy are prevented.
______ refers to the pollination taking place below the surface of the water in hydrophytes bearing submerged female flowers.
Match the following:
| Pollen | a. | anther |
| Ovule | b. | protection |
| stamen | c. | Powdery |
| Sepal | d. | Seed |
Differentiate self-pollination and cross-pollination.
Which of the following characters is NOT required for autogamy?
What are the possible types of pollinations in chasmogamous flowers. Give reasons.
Entomophily is ______.
