Stomatal guard cells co-opted an ancient ABA-dependent desiccation survival system to regulate stomatal closure
18.03.2015
Lind C, Dreyer I, López-Sanjurjo EJ, von Meyer K, Ishizaki K, Kohchi T, Lang D, Zhao Y, Kreuzer I, Al-Rasheid KA, Ronne H, Reski R, Zhu JK, Geiger D, Hedrich R.
Curr Biol. 2015;25(7):928-35.
Fast drought/ABA-signaling in guard cells of higher plants involves the SnRK2 kinase OST1 activating the anion channel SLAC1. The emergence of stomata in the last common ancestor of mosses and vascular plants coincided with the origin of SLAC1-type channels capable of using the ancient ABA drought signaling kinase OST1 for regulation of stomatal closure.
