PNH — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0577170, designated HvPNH on barley chromosome 6H, encodes an Argonaute family protein containing Piwi, PAZ and RNaseH-like domains. The product is associated with histone ubiquitin ligase activity, siRNA and miRNA binding, and DNA-binding transcription activator activity. HvPNH is linked to miRNA metabolic processes, long siRNA processing, gene silencing by miRNA-directed mRNA cleavage, somatic stem cell population maintenance, temporal regulation of development, and regulation of cell fate specification. It localises to the BAT3 complex, D body, protein storage vacuole, pollen tube and thylakoid. The gene is associated with spikelet number, spikelet fertility, inflorescence development, leaf shattering, peduncle length, zinc concentration, gibberellic acid content, photosynthetic ability, and UV-A and UV-B light sensitivity. Studies of related genes in other species connect the family to meiosis, shoot apical meristem initiation, antiviral immunity, grain yield, drought stress response and reproductive development.