Strigolactone- and karrikin-independent SMXL proteins are central regulators of phloem formation - Wallner, Eva-Sophie; López-Salmerón, Vadir; Belevich, Ilya; Poschet, Gernot; Jung, Ilona; Grünwald, Karin; Hell, Rüdiger; Agusti, Javier; Lebovka, Ivan; Greb, Thomas (Current biology, 2017)