RLK — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0441080 (HvRLK) on barley chromosome 5H encodes a transmembrane receptor serine/threonine kinase with a legume lectin domain, belonging to the L-type lectin receptor kinase family. The protein exhibits histidine kinase activity, sugar binding, and protein serine/threonine kinase activity. HvRLK is associated with immune responses, including defence against bacteria, oomycetes, and other organisms, as well as innate immunity and virus-induced PTGS. It is linked to pollen development and aperture formation, sporulation, and regulation of developmental growth. The gene is associated with cytokinin and brassinosteroid signalling, the histidyl-aspartyl phosphorelay, and inhibition of the salinity response. It is also associated with response to heat and stem rust. The protein localises to the membrane, plasmalemma, cytosol, and pollen aperture. Studies of related genes in other species link the family to additional developmental and signalling roles.