Biology, asked by soffia44666, 4 months ago

What stimulates the pollen tube to grow

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Answered by ishikasingh43

1

Answer:

Once a pollen grain settles on a compatible pistil, it may germinate in response to a sugary fluid secreted by the mature stigma. Lipids at the surface of the stigma may also stimulate pollen tube growth for compatible pollen. ... Once the pollen tube reaches an ovule, it bursts to deliver the two sperm cells.

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