Question

in hydrophilic plants the pollen grains will not be wet ? why ?​

Answer 1

Answer:

Pollination carried out through water is called hydrophily. Pollination by water is quite rare in flowering plants. (E.g. freshwater plants like Vallisneria, Hydrilla; marine water plants like Zostera). Light unwettable pollen grains are present in these plants. Pollen grains are surrounded by mucilaginous covering, hence protected from wetting. Stigma is long, sticky and unwettable.

Pollination by water may occur at two places: 

Epihydrophily: It occurs on the surface of the water. e.g. Vallisneria.

Hypohydrophily: It occurs beneath the surface of the water. e.g. Zostera.