HO1 — Glycine max

Summary

GLYMA_04G147700V4 (GmHO1) encodes a heme oxygenase (decyclizing) enzyme, a member of the Haem_Oase family, that localises to the chloroplast thylakoid membrane and envelope. The enzyme is associated with heme oxidation and is linked to phytochrome chromophore and phytochromobilin biosynthesis. GmHO1 is associated with chloroplast-nucleus signalling, de-etiolation, photoperiodism, flavonoid and carotenoid metabolism, and responses to nitrate, symbiotic bacteria, and UV-C. The gene has been linked to chlorophyll and protein content, oxidative stress response, photomorphogenesis, flowering time, chloroplast development, and tolerance to salinity, cadmium, boron, and iron deficiency. It is also connected to jasmonic acid signalling, lateral root formation, hypocotyl elongation, and seedling development. Studies of related genes in other species link the family to phytochromobilin biosynthesis, iron deficiency tolerance, and light-insensitive hypocotyl elongation.