PNH — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.4HG0334490 (HvPNH) on barley chromosome 4H encodes a protein containing Piwi and Argonaute domains, characteristic of the Argonaute family. The gene is associated with siRNA and miRNA binding, miRNA metabolic processes, and gene silencing by miRNA-directed mRNA cleavage. HvPNH has been linked to somatic stem cell population maintenance, regulation of cell fate specification, temporal regulation of development, and acropetal auxin transport. Associations with agronomic traits include spikelet fertility, spikelet number, inflorescence development, photosynthetic ability, leaf shattering, and gibberellic acid content. The gene is also connected to UV-A and UV-B light sensitivity, osmotic response sensitivity, and metal stress responses including cadmium uptake and zinc concentration. Studies of related genes in other species link the family to shoot apical meristem initiation, meiosis, and reproductive development.