Question

Where is sporopollenin present in plants? State its significances with reference to its chemical nature.

Answer 1

Sporopollenin is present in the exine of pollen grains in plants. Its significance with reference to its chemical nature are as follows:

• It is one of the most resistant organic substance which can withstand high temperature, strong acids and alkali.
  
• No enzyme that degrades sporopollenin is so far known. This sporopollenin helps the pollen grain to be well preserved.