APX — Capsicum annuum

Summary

CaAPX (T459_22813) on pepper chromosome 9 encodes a cytosolic L-ascorbate peroxidase (EC 1.11.1.7) with annotated activities including L-ascorbate peroxidase, p-coumarate 3-hydroxylase, siRNA binding, and protein kinase activity. The gene is associated with the ascorbate-glutathione cycle, cellular response to oxidative stress, photoprotection, carotenoid and auxin metabolism, and positive regulation of stomatal complex development. It has been linked to traits including bacterial blight disease resistance, viral disease response, pungency, fruit size, days to flowering, net photosynthetic rate, relative chlorophyll content, leaf area index, root volume, seed viability, and proline content. Localisation evidence connects the product to the peroxisome membrane, chloroplast thylakoid membrane, stress granule, plasmodesma, and extracellular region. Related genes in other species are linked to heat, drought, salt, and oxidative stress tolerance, as well as root development and pathogen defence.