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प्रश्न
When and why does a plant breeder employ the emasculation technique?
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उत्तर
Plant breeders employed this technique to prevent pollination within the same flower or to pollinate stigmas with pollen of the desired variety. To remove the anthers, the flowers are covered with a bag before they open. This ensures that the flower is pollinated by pollen grains obtained from desirable varieties only. Later, the mature, viable, and stored pollen grains are dusted on the bagged stigma by breeders to allow artificial pollination to take place and obtain the desired plant variety.
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संबंधित प्रश्न
What are chasmogamous flowers?
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Add a note on pollination mechanism in Salvia.
Write two ways in which pollination may occur in plants.
Fill in the blank:
Male sex cells in plants are called _________.
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Differentiate between geitonogamy and xenogamy (allogamy).
Name the two types of pollination.
Write different modes of pollination in detail with suitable examples.
What are the adaptations which are required in cross-pollinated
Give an account of various abiotic agencies used in pollination along with their adaptations for pollination.
Pollination by water occurs in ______.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Which of the following is not a water pollinated plant?
Which of these is a condition that makes flowers invariably autogamous?
The flower which possesses both androecium and gynoecium is called perfect or ______.
Insect pollinated flowers are ______.
Autogamy can occur in a chasmogamous flower if ______.
What is self-incompatibility?
What is ornithophily?
Describe any three adaptations in anemophilous flowers.
Consider the following statements depicting adaptation of flowers to carryout successful pollination.
- Stigma is long, sticky and unwettable.
- Sepals, petals or perianth (if present) have waxy coating.
- Stamens with long filament and versatile anthers.
- Tubular corolla is seen.
- Flowers are noctumal.
Which of the above statements clearly depict hydrophily?
Mention any one example of the anemophilous flower.
