Explain the process of pollination in Vallisneria. How is it different in water-lily, which is also an aquatic plant? [3]

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Solution

In Vallisneria, pollination takes place through water. The female flower reaches the surface of water by a long stalk, while male flowers release pollen grains on to the surface of water. Pollen grains are carried passively by the water current and reach the stigma of female flowers. [2]

In water lily, pollination takes place through wind or insect as the female flower emerges above the surface of water. [1]

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Similar questions

Q. Explain the process of pollination in Vallisneria. How is it different in water-lily, which is also an aquatic plant? [3]

Q. Which statements among the following are true?

i. Water pollinated plants are Vallisneria, water lily, Zostera
ii. Water pollination is mostly found in monocots and only in very few dicots.
iii. Majority of floating aquatic plants are insect or wind pollinated.
iv. Water pollinated plants produce nectar.

Which of the following statements is/are correct for hydrophily?

(i) Pollination by water is rare in flowering plants and is limited mostly to monocotyledons.

(ii) In majority of aquatic plants such as water hyacinth and water lily pollination takes place by insects and winds.

(iii) In most of the water pollinated species pollen grains are protected from getting wet by a mucilaginous covering.

(iv) In Vallisneria, female flowers reach the surface of water and receive the pollen grains, whereas in Zostera, female flowers remain submerged and receive pollen grains under water.

Q. Select the correct and incorrect statements.
(a) Tapetum nourishes developing pollen grains.
(b) Hilum represents junction between ovule and funicle.
(c) In aquatic plants, Water Hyacinth and Water Lily, pollination is by water.
(d) Primary endosperm nucleus is triploid.

Q. Study the following statements and select the correct option.
I. Tapetum nourishes the developing pollen grains.
II. Hilum represents the junction between ovule and funicle.
III. In aquatic plants such as water hyacinth and water lily, pollination is by water.
IV. The primary endosperm nucleus is triploid.

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