Question

One of the synthetic auxin is

• A. IAA
• B. NAA
• C. IBA
• D. both B and C

Hint:

All these auxins are extensively used in agricultural and horticultural practices

Answer 1

The Correct Option is B

To determine the correct answer to the question of which is a synthetic auxin, we need to understand what auxins are and the difference between natural and synthetic auxins.

Auxins are a class of plant hormones that play a crucial role in the coordination of many growth and behavioral processes in the plant's life cycle. They are primarily involved in cell elongation, root initiation, and bud growth.

There are two types of auxins:

• Natural Auxins: These are naturally occurring plant hormones. The most common natural auxin is Indole-3-acetic acid (IAA).
• Synthetic Auxins: These are artificially manufactured and mimic the action of natural auxins. Some common synthetic auxins include Naphthaleneacetic Acid (NAA) and Indole-3-butyric acid (IBA).

Now, let's analyze the options:

1. IAA (Indole-3-acetic acid): It is a natural auxin, not synthetic.
2. NAA (Naphthaleneacetic Acid): This is a synthetic auxin, widely used in plant propagation and tissue culture.
3. IBA (Indole-3-butyric acid): While primarily recognized as a naturally occurring compound, it is often used in concentrations that mimic the effect of synthetic auxins.
4. Both B and C: Generally, in common usage, option B (NAA) is considered a synthetic auxin; IBA can be derived synthetically for horticultural use, but in its natural form, it is considered closer to natural auxins than NAA.

Based on the above analysis, the correct answer given the context and common usage in horticulture and plant sciences is NAA (Naphthaleneacetic Acid) as a synthetic auxin. Thus, the correct option is B.