Indole-3-acetic acid (IAA) is the predominant auxin in plants and an important determinant of phytochrome-mediated growth suppression during de-etiolation
Auxin is well known to be implicated in developmental processes such as stem elongation, phototropism, gravitropism, vascular tissue differentiation and cell expansion. In pea endogenous IAA was increased under EOD-FR
Up-regulation of auxin-induced genes under low irradiance and low R:FR ratio resulted in increased hypocotyl elongation in A. thaliana