APX — Phaseolus vulgaris

Summary

PHAVU_011G071300 (PvAPX) on chromosome 11 of French bean encodes a haem peroxidase with L-ascorbate peroxidase activity, also annotated with p-coumarate 3-hydroxylase, siRNA and miRNA binding, RNA endonuclease, and protein kinase activities. The product localises to the peroxisome membrane, chloroplast thylakoid membrane, plasmodesmata, and stress granules. PvAPX is associated with the ascorbate-glutathione cycle, cellular response to oxidative stress, chlorophyll and polyamine metabolism, and positive regulation of stomatal complex development. It is linked to traits including bacterial blight disease resistance, salt and submergence tolerance, seed viability, days to flowering, photosynthetic rate, water-use efficiency, and root dry weight. Related genes in other species are associated with heat and light stress tolerance, pathogen defence, and post-transcriptional gene silencing.