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Pollen grains land on the stigma and germinate
A pollen tube develops from the pollen grain and grows down the style to the ovary.It obtains nourishment along the style
The tube nucleus leads the way and generative nucleus follow close behind it
As the tube grows downwards the generative nucleus divides by mitosis to form two male nuclei
The pollen tube breaks through the ovary wall and enters the ovule through micropyl
The tube disintegrates giving clear way for two male nuclei
isaacmuthini answered the question on October 14, 2017 at 09:35
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