Question:
Explain the role of tapetum in the formation of pollen-grain wall.
Answer:
The tapetum is the innermost layer of the microsporangium. It provides nutrition to the developing pollen grains. It secretes enzymes, hormones and special proteins for the pollen grains to recognise compatibility. It also produces the exine layer of the pollen grains, which is composed of the sporopollenin.
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