HB1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.4HG0394960 (HB1) on barley chromosome 4H encodes a leghaemoglobin-like globin protein with oxygen carrier and binding activities, heme binding, redox activity, and TBP-class protein binding. It is associated with oxygen transport, responses to hypoxia, nitric oxide, nitrite, nitrate, salt, cytokinin, and calcium or potassium starvation, as well as fermentation, S-nitrosylation, and fatty acid and triglyceride metabolism. The protein localises to the nucleus, cytosol, cytoplasm, plasmalemma, plasmodesma, and plant-type cell wall. HB1 is associated with photosynthetic rate, stomatal resistance, chlorophyll and protein content, seed oil and fatty acid content, cold tolerance, drought tolerance, nitrogen metabolism, root architecture, flowering time, and nitric oxide homeostasis. Studies of related genes in other species link the family to nitrogen use efficiency, waterlogging tolerance, cadmium tolerance, and fungal resistance.