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प्रश्न
Add a note on pollination mechanism in Salvia.
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उत्तर
Pollination mechanism in Salvia:
i. In Salvia, flower is bisexual and protandrous, i.e. anthers mature earlier than stigma.
ii. The two stamens of flower have long bifurcated connective.
iii. Upper branch of connective bears fertile anther lobe, while lower has sterile anther lobe.
iv. When an insect enters the flower, it pushes the lower sterile lobes. As a result, the upper fertile anther lobe bends down.
v. The fertile anther lobe comes in contact with back side of insect body and pollen grains are dusted there.
vi. When the same insect visits another flower with matured gynoecium, the pollen grains are picked up
by the receptive stigma.
vii. This mechanism is called lever-mechanism or turn-pipe mechanism.
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संबंधित प्रश्न
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Enlist advantages and disadvantages of cross pollination
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Fill in the blanks with suitable words.
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Pollination by water occurs in ______.
Which of the following pair has haploid structures?
Complete the following table:
| 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.
