AP2 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.3HG0221630 (HvAP2) on barley chromosome 3H encodes a DNA-binding transcription factor of the AP2/ERF subfamily, localised to the nucleus. In barley, this gene is associated with meristem and inflorescence development, seed germination, mitosis, syngamy, and programmed cell death. It is also linked to nitrate import, starch and carbohydrate metabolism, the TCA cycle, autophagy, and nucleotide-sugar metabolism. At the trait level, HvAP2 has been connected to grain yield, grains per spike, plant height, anther extrusion, floral organ identity, drought tolerance, and nitrate uptake. Studies of related genes in other species link the AP2 family to additional agronomic traits such as seed size and shape, panicle architecture, spike density, biomass yield, and root volume.