Fig. 2
From: Uncovering early transcriptional regulation during adventitious root formation in Medicago sativa
Cross sections of stem base tissue showing the development of adventitious root at different stages. a-d Cross section of stem base of initial separation stage (a), induction stage (b), AR primordium formation stage (c) and AR maturation stage (d). e–h Longitudinal section of stem base of initial separation stage (e), induction stage (f), AR primordium formation stage (g) and AR maturation stage (h). The arrows represent the direction in which the adventitious roots form