Explain the role of water as a pollinating agent in Vallisneria spiralis.

Explanation

Pollination in Vallisneria spiralis . It is a dioecious , submerged and rooted hydrophyte . The female plant bears solitary flowers which rise to the surface of water level using a long coiled stalk at the time of pollination . A small cup shaped depression is formed around the female flower on the surface of the water . The male plant produces male flowers which get detached and float on the surface of the water. As soon as a male flower comes in closer to a female flower , it gets settled in the depression and contacts with the stigma thus bringing out pollination . Later the stalk of the female flower coils and brings back hte flower from surface to under water where fruits are produced.