Assertion : Endothecium layer of anther wall plays an important role in dehiscence of anther. Reason : The…
Assertion : Endothecium layer of anther wall plays an important role in dehiscence of anther.
Reason : The presence of fibrous bands and differential expansion of inner and outer tangential walls of endothecial cells cause dehiscence of anther.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Solution
With the loss of water the differentially thickened cells of endothecium contract from their outer thin walls. The latter become concave. It brings their outer radial walls nearer. As a result the endothecium shortens and ruptures the anther lobe wall in the region of stomium.