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Question
What is meant by emasculation?
Solution
Emasculation is the removal of stamens, mainly the anthers from the flower buds before their dehiscence. This is mainly done to avoid self-pollination. Emasculation is one of the measures in the artificial hybridization.
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RELATED QUESTIONS
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
Why angiosperm anthers are called dithecous?
Add a note on pollination mechanism in Salvia.
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 two characteristics of flowers in which pollination occur by wind.
What is meant by pollination?
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
What are the adaptations which are required in cross-pollinated
Mention various adaptations for wind pollination.
Autogamy can occur in a chasmogamous flower if ______.
A dioecious flowering plant prevents both ______.
Heterostyly as a contrivance for cross-pollination is found in ______.
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During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
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| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
Briefly discuss any two methods by which plants avoid self-pollination.
When and why does a plant breeder employ the emasculation technique?
