ABA-INSENSITIVE1 activates ammonium transporter AMT1 in an ABA dependent manner (Plant Physiol)
Plant Science Research WeeklyTo avoid ammonium toxicity, the ammonium transporters (AMTs) are tightly regulated by phosphorylation-dependent inactivation. The multifunctional kinase CIPK23 inactivates the AMT1s by phosphorylating conserved threonine residues (T460 in AMT1;1 and T472 in AMT1;2). ABA-INSENSITIVE1 (ABI1) and ABI2…