APX — Glycine max

Summary

GmAPX (GLYMA_U031318V4) on soybean chromosome 10 encodes a haem peroxidase family protein with L-ascorbate peroxidase activity, along with additional annotated molecular functions including p-coumarate 3-hydroxylase activity, siRNA and miRNA binding, RNA endonuclease activity, and protein kinase activity. The gene is associated with the ascorbate-glutathione cycle, xanthophyll cycle, chlororespiration, cellular and alternative respiration, chlorophyll metabolism, cell wall repair, citrate secretion, and positive regulation of stomatal complex development. It localises to the peroxisome membrane, chloroplast stroma, plasmodesma, stress granule, and plant-type cell wall. GmAPX has been linked to numerous agronomic traits including relative chlorophyll content, net photosynthetic rate, quantum yield, water use efficiency, biomass yield, seed viability, bacterial blight disease resistance, submergence tolerance, carotenoid content, linolenic acid content, and days to flowering. Related genes in other species connect it to oxidative stress tolerance, heat and light stress responses, drought tolerance, pathogen defense, and root development.