PNH — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0189750, designated HvPNH on barley chromosome 2H, encodes a Piwi/Argonaute-family protein containing PAZ and RNaseH-like domains. 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, female meiotic nuclear division, and acropetal auxin transport. Traits associated with this gene include spikelet fertility, inflorescence development, photosynthetic ability, leaf and stamen morphology, and responses to UV-A and UV-B light. Associations with gibberellic acid and cytokinin content, root phototropism, and osmotic response sensitivity have also been noted. Related genes in other species link the family to meiosis, pollen development, tapetum function, juvenile-to-adult transition, and TAS3 tasiRNA biogenesis.