PNH — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0125150 (HvPNH) on barley chromosome 2H encodes a Piwi/Argonaute-family protein containing PAZ and Piwi domains, with annotated molecular functions including siRNA and miRNA binding, histone ubiquitin ligase activity, and DNA-binding transcription activator activity. The gene is associated with miRNA and long siRNA metabolic processes, gene silencing by miRNA-directed mRNA cleavage, somatic stem cell population maintenance, regulation of cell fate specification, and female meiotic nuclear division. It has been linked to traits including spikelet fertility, spikelet number, inflorescence development, leaf morphology, photosynthetic ability, gibberellic acid and cytokinin content, zinc concentration, and responses to UV-A and UV-B light. Studies of related genes in other species connect the family to meiosis, pollen development, tapetum function, leaf polarity, auxin signaling, and juvenile-to-adult transition.