Write the mode of pollination in Vallisneria and water lily. Explain the mechanism of pollination in Vallisneria.
Answers
Mode of Pollination - water pollination in Vallisneria :
The plant is dioecious.On maturity, the male flowers get detached from the parent plant and float up and come to the surface of water.At 16 the same time, the female flowers also rises up to the surface of water by straightening of the coiled stalk. The detached male flowers cluster around the floating female flower and dehisce, thereby performing pollination. The long stalks of the female flower begin to coil down to the bud lelvel where the fruit ripens.
Answer:
In VALLISNERIA initially the male flower is submerged in water. On maturity it gets detached and floats on the surface of water. The female flower, which has a long stalk, also floats in the surface of water. Pollination occurs when the male flower, moving with the water current, comes in contact with the female flower and the pollen grains are transferred to the stigma.