Isoform 1: Expressed mainly in the low bolt. Isoform 2: Expressed mainly in the low bolt. Detected in flowers. Isoform 4: Expressed mainly in the low bolt. Isoform 5: Expressed mainly in the 6 days old seedlings. Detected in 16 days old seedlings, axil, low bolt and floral samples, but only barely in leaves and top bolt. Circadian-regulation (PubMed:24442277). Down-regulated in axillary buds within 24 hours after decapitation and then up-regulated (PubMed:15908603). Down-regulated by the transcription factor ERF114 (PubMed:23616605). Down-regulated by cold (PubMed:24442277). Almost complete down-regulation by sucrose, fructose and glucose, but not by other sugars (PubMed:16463203). Up-regulated by heat and dark growth conditions (PubMed:24442277). Isoform 2: Up-regulated by salt. Isoform 4: Up-regulated by salt. Isoform 1: Not up-regulated by salt. Isoform 5: Not up-regulated by salt (PubMed:24442277). No visible phenotype. Drm1 and drmh1 double mutants have no visible phenotype. Predicted to be an intrinsically disordered protein. May be artifactual or particularly rare. Belongs to the DRM1/ARP family.