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Explain the role of tapetum in the formation of pollen - grain wall.

17. Explain the role of tapetum in the formation of pollen-grain wall.

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S Sonika

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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