Rhizogenesis refers to formation of:
Rhizogenesis denotes formation of roots from callus, shoots or explants, derived from rhiza root, complementing caulogenesis in organogenesis. It is induced predominantly by elevated auxin levels and low cytokinin, mirroring natural lateral root formation. Molecular basis involves creation of localized auxin maxima through biosynthesis via YUCCA pathway and polar transport by PIN1, PIN2, AUX1 carriers concentrating auxin in founder cells. Perception via TIR1/AFB F-box receptors triggers degradation of Aux/IAA repressors liberating ARF7 and ARF19 transcription factors that induce LBD16, LBD29 a
Ref: Taiz & Zeiger Plant Physiol. 6th ed., Auxin transport and root development; Lodish Molecular Cell Biology Chap. 16.
