Pollen example sentences

Pollination is the process of transfer of pollen grains from the anther of one flower to the stigma of the same or another flower.When the pollen of a flower lands on the stigma of another flower of the same plant, or that of a different plant of the same kind.The pollen tubes enter the embryo-sac where two male gametes are discharged.If the pollen lands on the stigma of the same flower it is called self-pollination.In self-pollination, pollen grains are transferred from the anther to the stigma of the same flower.Pollen grain, after dispersal from the anthers, are carried by wind or various other agencies to the stigma of a pistil.Since pollen grains are light, they can be carried by wind or water.The pollen tube enters the embryo-sac where two male gametes are discharged.Unlike the gymnosperms where the ovules are naked, in the angiosperms or flowering plants, the pollen grains and ovules are developed in specialised structures called flowers.Insects visit flowers and carry away pollen on their bodies.Generally pollen grains have a tough protective coat which prevents them from drying up.The pollen tube carrying the male gametes grows towards archegonia in the ovules and discharge their contents near the mouth of the archegonia.The anthers, following meiosis, produce pollen grains.The pollen grains germinate on the stigma and the resulting pollen tubes grow through the tissues of stigma and style and reach the ovule.Anther contains pollen grains which produce male gametes.