OsMPK6 — Oryza sativa Japonica

Summary

OsMPK6 (OS10G0533600) on rice chromosome 10 encodes a mitogen-activated protein kinase (MAPK) with serine/threonine and tyrosine kinase activity, belonging to the MAP kinase family. In rice, OsMPK6 is associated with disease resistance, particularly against Magnaporthe oryzae and Xanthomonas oryzae pv. oryzae (bacterial blight), and with defense responses involving salicylic acid, jasmonic acid, and diterpenoid phytoalexin biosynthesis. It is linked to stress responses including salt, temperature, and UV-C, as well as to cytokinin and gibberellin metabolism, embryogenesis, and morphogenesis. The protein localizes to the nucleus and cytoplasm. OsMPK6 has also been connected to grain yield traits such as grain number, size, and weight, and to anthesis time. Studies of related genes in other species further link the family to salt tolerance and plant growth regulation.