Corrigendum: Knock-Down of the Phosphoserine Phosphatase Gene Effects Rather N- Than S-Metabolism in Arabidopsis thaliana - Samuilov, Sladjana; Rademacher, Nadine; Brilhaus, Dominik; Flachbart, Samantha; Arab, Leila; Kopriva, Stanislav; Weber, Andreas P. M.; Mettler-Altmann, Tabea; Rennenberg, Heinz (Frontiers in Plant Science, 2019)