Rpg1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0080650, also known as Rpg1, encodes a SWEET family protein with sugar transmembrane transporter activity and protein binding capability. This barley gene on chromosome 1H is associated with stem rust resistance and resistance to fungal pathogens, as well as wheat leaf rust disease response. It is linked to galactose transmembrane transport, carbohydrate transport, auxin transport and signaling, and negative regulation of auxin-mediated signaling. The protein localizes to the membrane and plasmalemma. Rpg1 is also associated with pollen germination and photosynthetic rate. Studies of related genes in other species link the family to grain size, grain number, grain-filling, sugar transport, panicle development, freezing tolerance, and plant size.