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17. Explain the role of tapetum in the formation of pollen-grain wall.
Answers (1)
Tapetum is the nutritive innermost layer of microsporangium that provides nutrition to the developing microspores. The role of tapetum in the formation of pollen grain wall is as follows:
- Tapetum secretes ubisch granules required for the formation of sporopollenin in the exine (outer wall) of pollen grain
- Tapetum also secretes pollenkit substances required for the formation of pollen grain wall
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