RNA-binding protein involved in the regulation of flowering time. Acts as repressor of the activity of SOC1, a transcriptional activator of flowering time. Binds to the 3'-UTR of SOC1 mRNA in the cytoplasm and participates in SOC1 mRNA decay, mediated by the distal region of the SOC1 3'-UTR (PubMed:23437850). Acts as positive regulator of salicylic acid (SA)-mediated immunity. May act on SA signaling-related genes at a post-transcriptional level (PubMed:20636102). Highly expressed in stems and cauline leaves, and at lower levels in siliques, flowers, roots and rosette leaves. By abscisic acid (ABA). No visible phenotype under normal growth conditions, but mutant plants show enhanced susceptibility to the pathogen Pseudomonas syringae pv. tomato DC3000.