Question

Name two synthetic auxins. Give four functions of auxins.

Answer 1

A number of other chemical compounds have been synthesized which exhibit auxin activity. They are called as synthetic auxins.

Some of the commonly known synthetic auxins are, for example, 2, 4 Dichloro phenoxy acetic acid (2, 4-D), α-Naphthalene acetic acid (α-NAA), 2,4,5- Trichlorophenoxyacetic acid (2,4,5-T), etc.

Functions of Auxins:

1) Apical dominance

2) Control of abscission

3) Auxins like IAA, IBA, NAA induce rooting in stem cuttings of various plants

4) Induce parthenocarpy in some plants like tomato, cucumber, pepper, etc

5) Differentiation of xylem and phloem

6) Auxin like 2,4-D is widely used as a herbicide to kill dicotyledonous weeds