Auxins mainly promote:
Auxins represent principal hormone class promoting root initiation and development, encompassing natural indole-3-acetic acid IAA synthesized via Trp dependent TAA1 YUCCA flavin monooxygenase pathway and synthetic analogues NAA, IBA, 2,4-D with higher stability and resistance to enzymatic oxidation by IAA oxidases. For rhizogenesis auxin maximum generated at basal end through PIN efflux carrier mediated polar transport triggers pericycle or phloem parenchyma cells to become root founder cells. Signaling involves TIR1/AFB auxin receptors part of SCF ubiquitin ligase complex that in presence of
Ref: Woodward & Bartel Ann Bot 2005 Auxin biology; Lavy & Estelle Development auxin signaling.
