Transcription activator. This protein has been described as HOS10 (high expression of osmotically responsive genes 10), a coordinating factor for responses to abiotic stress and for growth and development (PubMed:15994234). However, due to a locus misidentification, the locus responsible for the HOS10 phenotypes reported in ecotype C24 remains unknown and the paper has been retracted (PubMed:20622156).