Epihydrophily: Pollination occurs at the water level. It can occur in the given two ways: Autogamy : It is a type of self-pollination, where pollination occurs within the same flower . Epihydrophily :Plants which are pollinated outside the water. Epihydrophily : Plants which are pollinated outside the water. freshwater plants like Vallisneria, Hydrilla; marine water plants like Zostera). It is referred to as the primary type of pollination as it includes a single flower. Approximately 65% of flowering plants are insect-pollinated. Self-pollination occurs when pollen grains fall directly from anther into the stigma of the flower. Types : Epihydrophily Hypohydrophily Epihydrophily – pollination occurs over the surface of water. suhani678 suhani678 Cross-pollination occurs when you have the same plant of different varieties in a garden space. When the wind blows, or a bee travels into the flower of one plant variety, and the pollen of this plant makes its way into the flower of another type. Biotic agents (a) Entomophily : When pollination is brought about by the agency of insects, it is known as entomophily or insect pollination. (ii) Biotic agents (a) Entomophily : When pollination is brought about by the agency of insects, it is known as entomophily or insect pollination. Cross pollination Cross pollination is the transfer of pollen grains from the anther of one flower to the stigma of a genetically different flower. Pollination by water is quite rare in flowering plants. This process is also called allogamy or xenogamy. Examples: Vallisneria spiralis, Elodea. (E.g. Pollination that takes place below the water surface is called hypohydrophily. e.g.Vallisneria (Ribbon weed). The female plant bears solitary flowers which rise to the surface of water level using a long coiled stalk at the time of pollination… Species pollinated by various groups of pollinators were distributed non ‐ randomly, hence long-distance pollen flow is necessary in a forest. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Accordingly, the types of pollination are anemophily or anemogamy […] About 80% pollination occurs by insects like moths, beetles, butterflies, wasp, etc. e.g., Vallisneria (Ribbon weed). About 80% pollination occurs by insects like moths, bettles, butterflies, wasp, etc. Hypohydrophily - pollination occurs below the surface of water. ADVERTISEMENTS: In this article, we will discuss about the three agents for pollination. Start studying Plant Reproductive Adaprations -1. It requires two flowers belonging to two different parents. Cross pollination is performed with the help of an external agency. Many tree species are cross pollinated, if pollination doesn’t occur they opt for self pollination as an alternative device. Pollen grains are surrounded by mucilaginous covering, hence protected from wetting. They are: (1) Anemophily (2) Zoophily and (3) Hydrophily. Artificial Pollination Biswarup Majumder | Bio-World Procedure When man himself transfers pollen to the stigma it is called artificial pollination. Pollination in Vallisneria spiralis: It is a dioecious, submerged and rooted hydrophyte. Self-pollination usually occurs in hermaphrodite or dioecious plants, where a flower can pollinate by itself or less dependent on the external factors. It occurs in completely submerged plants like Ceratophyllum and Zostera. It has already been stated that pollination, in a vast majority of cases, involves some agent. 14. Light unwettable pollen grains are present in these plants. 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