Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The process of somatic embryogenesis involves embryo induction, development and maturation stages.
Reason (R): Auxin is not required for embryo initiation whereas embryo maturation requires high auxin concentration.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

In Embryogenesis, you ADD Auxin to start the process but you must REMOVE it to let the embryo grow and mature.

Answer 1

The Correct Option is C

Concept: Somatic embryogenesis is a staged process where cells are first induced to become embryogenic and then proceed through distinct developmental phases.

Step 1: Evaluating the Assertion.
Assertion (A) is correct. Somatic embryogenesis is broadly divided into induction (forming the embryogenic cells), development (globular, heart, and torpedo stages), and maturation (preparing for germination).

Step 2: Evaluating the Reason (The Error).
Reason (R) states that auxin is not required for initiation but is needed for maturation. This is backwards. In reality:
• Initiation/Induction: Requires high levels of auxins (like 2,4-D) to make cells embryogenic.
• Maturation/Development: Requires the removal or lowering of auxin levels to allow the embryo to develop its own polar structure and mature.

Step 3: Conclusion.
Since the Assertion is true but the Reason contains false biological information regarding hormone requirements, option (3) is the correct choice.