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