Question

Discuss the role of auxin and auxin transporters in the formation of the primary vascular system of stems and the venation pattern of leaves.

Answer 1

Answer
Auxin is a plant hormone play role in development of meristematic tissues.It synthesised in the apical meristem tissue of stem and transport downward to the different parts. A vascular tissues grow from meristem and connect various part of the plants. They are compose of Phloem and Xylem tissue. Phloem transport food via sieve and xylem transport water through vessels.
Auxin is transported from one part to the other by transport protein. PIN and PGP are the transport protein. PIN control the directionality of movement whether efflux or influx. It also controls in development of vascular tissue and the serration in leaf.