THE POLLINATION OF VALLISNERIA SPIRALIS ROBERT B. WYLIE (WITH PLATE IX AND SIX FIGURES) Vallisneria has long been counted one of the classic examples of cross-pollination. Living vegetatively as a submersed aquatic, its dioecious flowers are brought together at the surface of the water in most ingenious fashion.

In Vallisneria, the female flowers are submerged in the water. They reach the surface of water by the long stalk on reaching maturity. At this time, the male flowers are released onto the surface of water. With the help of the water, the pollens come in contact with the female flowers and the pollination is achieved.

2024年9月19日 · Pollination by Water is called hydrophily. It is quite rare in flowering plants. (E.g. freshwater plants like Vallisneria, and Hydrilla; marine water plants like Zostera). Pollination is the process in which the pollen grains are shed from the anther of the male flower to reach the stigma of the female flower.

Male Vallisneria produces gametes (pollen), which reach the female flower for fertilisation. The gametes are dispersed in water through water pollinators. The roots of hydrophytes do not have any significant role in absorption. Their main duty is anchorage. Hence, they are fibrous and have reduced structures.

2018年10月11日 · Mode of Pollination-Water (hydrophily) 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 the same time, the female flowers also …

The pollination in the Vallisneria and seagrasses is achieved with the help of water. In Vallisneria, the female flowers are submerged in the water. They reach the surface of water by the long stalk on reaching maturity. At this time, the male flowers are released onto the surface of water.

In case of vallisneria water is the agent for cross pollination. In female vallisneria the flower reaches to the surface of water by the long stalk and the male flower or pollen grains are released into the surface of water. Female flowers or stigma carried them by water current .

In water - liye pollunation takes place through wind or insect , female flower emerges above the surface of water and gets pollinated.

Vallisneria grows in freshwater and is pollinated by water. It is a type of pollination known as hydrophily. The female flowers reach the surface of the water by a long stalk while the pollen grains are released on the surface of the water.

Pollination in Vallisneria is epihydriphilous. It is a type of hydrophily which occurs on the surface of water. The female flower have a very long pedicel, therefore it reaches the surface of water. Male flowers after breakage floats on the surface of water. …