Explain germination of pollen grains on stigma draw diagram.
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Pollen germination starts with the pollen grain landing on stigma. ... The intine grows out through the germ pore and form pollen tube. It grows into the tissue of the style towards the ovary. By this time the tube nucleus degenerates and the generative nucleus divides to form two male gametes
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Diagram showing germination of pollen on stigma: The process of union of male and female gametes is known as fertilisation. ... After the pollen reaches the stigma, pollen germinates producing a pollen tube that carries the sperm nuclei to the ovary. Two sperm nuclei are released in the ovule.
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