Involved in salt stress tolerance. May act through abscisic acid (ABA) signaling pathways and promote reactive oxygen species (ROS) production. Interacts with REM19/RTV1. Expressed in roots, shoots, leaf vasculature and stems. By salt and drought stresses. No visible phenotype under normal growth conditions, but mutant seedlings show increased salt-stress tolerance. Truncated N-terminus. The predicted gene At3g12350 has been split into 2 genes: At3g12350 and At3g12360.