Question

Is Aba an auxin?

Answer 1

ABA is called the abscisic acid. It is called a plant hormone. It is used in plants' developmental processes including seed and bud dormancy. It is also used to control the organ size and stomatal closure. It is also called the growth hormone. In the epidermis layer auxin provides the closure of stomata and it increases the tolerance of plants during the stress time.

Complete answer:
The main role of ABA is to regulate the abscission and dormancy. It plays an important role in the regulation of biotic and abiotic stress responses. The pathways of ABA and auxin interact in regulation of different growth and stress responses. It is the first sight which appears in a conflicting pair of plant regulators.
ABA increases during the high stress and protects the plant water. During the stress, content of auxin in the xylem will decline while the conjugation of auxin increases. Auxin inhibits germination by enhancing the ABA action. So, the protective level during the regulation of dormancy of seed will increase by ABA. By using this hormone all the plants in the earth will tolerate the environmental stresses.

Note:
Auxin elongates the plant and promotes cell or plant growth. During the elongation process auxin will alter the plant wall plasticity. So, it will improve the plant growth by increasing the plasticity in plants. Auxin is also helped or influenced in the root formations. It plays an important role in the plant's life cycle and is also important in the growth of plant organs like stem, root and leaves.