XIAO — Oryza sativa Japonica

Summary

OS09G0110100, designated XIAO, encodes a transmembrane receptor protein serine/threonine kinase with coreceptor activity, protein homodimerization activity, and ATP binding, belonging to the PRK1-6/SRF4-like family with leucine-rich repeats and a protein kinase domain. In rice, XIAO is associated with post-embryonic plant organ development, regulation of floral meristem size, floral organ development and specification of floral organ number, as well as sucrose metabolism, gametophyte development, embryo sac development, regulation of stomatal complex development, somatic embryogenesis, and regulation of growth and cell growth. It is linked to stress responses including upregulation of innate immune response, regulation of defence response to fungi, activation of salinity response, upregulation of response to thirst, and heat acclimation. The protein localises to the plasma membrane and extracellular region. Studies of related genes in other species link the family to serine/threonine kinase activity.