BADH — Oryza sativa Japonica

Summary

OsBADH (Os08g0440800) encodes a betaine-aldehyde dehydrogenase (EC 1.2.1.9) with broad aldehyde dehydrogenase activity, including lactaldehyde, succinate-semialdehyde, and coniferyl-aldehyde dehydrogenase activities, and binds Na⁺ and K⁺ ions. In rice, the BADH2 allele is associated with grain fragrance and aroma, while BADH1 is linked to salinity, drought, and temperature stress tolerance. The ALDH2A variant is associated with submergence tolerance and mitochondrial localization, and ALDH2B is associated with male reproductive development, tapetum degeneration, and programmed cell death. The gene is also associated with glycine betaine biosynthesis, GABA catabolism, and ethanol metabolism. Associations extend to grain yield, plant height, stem diameter, pollen fertility, disease tolerance, and root morphology traits. Related genes in other species link the family to salt stress tolerance, submergence, and salinity stress.