Name the synthetic auxins used for inducing the rooting in woody plants.

Hint: Woody plants are usually either trees, shrubs, or lianas having large stems and roots. Rooting means small or miniature roots. So, rooting is root initiation of woody plants. Some synthetic auxins are 1-naphthalene acetic acid (NAA), 2,4-dichlorophenoxyacetic acid (2,4-D) etc.

Complete answer:
In this question we have been asked about the synthetic auxin that induces rooting in the plant.
So first, we'll understand the question. As we already mentioned woody plants are usually either trees, shrubs, or lianas having large stems and roots. And rooting means root initiation of woody plants. The rooting of plants is generally done for vegetative propagation so that the new plant contains genetic material of only one parent. As we know the main functions of Auxin are stem elongation, root growth and inhibit growth of lateral buds. So, we use some synthetic rooting hormones for rooting in woody plants. These hormones are 1-naphthalene acetic acid (NAA), 2,4-dichlorophenoxyacetic acid (2,4-D) and many more. They are easily available in the market. Some examples of woody plants propagated at the hardwood stage include forsythia, privet, fig, grape, and spirea.

Additional information: Vegetative reproduction is a form of asexual reproduction that occurs in plants where a new plant grows from a part of the parent plant or a reproductive structure.

Note:
Rooting is a type of vegetative propagation. For this we use synthetic auxin because synthetic auxins such as 1-naphthaleneacetic acid (NAA) induce similar physiological responses as natural auxins in bioassays and they are slower to degrade.