DREB2A — Oryza sativa Japonica

Summary

Os01g0165000 (DREB2A) on rice chromosome 1 encodes a transcription factor with an AP2/ERF domain that binds DNA and cis-regulatory regions. In rice, DREB2A is associated with tolerance to osmotic, salt, drought, oxidative, temperature, and abiotic stresses, as well as with abscisic acid (ABA) response and growth. The gene is linked to the ascorbate-glutathione cycle, MAPK cascade, ethylene-mediated signalling, stress and heat responses, DNA-dependent transcription, and signal transduction. It localises to the nucleus. Associations with osmotic adjustment capacity, proline and chlorophyll content, plant height, and tolerance to salinity, cold, and drought have also been recorded. Studies of related genes in other species connect the DREB2A family to chilling and high-temperature stress responses, leaf water potential, cell membrane stability, biomass yield, grain yield, and seed germination.