The submergence-induced drastic morphological plasticity of root in the amphibious plant Callitriche palustris
This study reveals that the amphibious plant *Callitriche palustris* exhibits a previously underappreciated root morphological plasticity termed "heterorhizy," characterized by distinct structural adaptations to terrestrial versus submerged conditions regulated by abscisic acid and gibberellin, a phenomenon likely conserved across diverse aquatic species.