APX — Nicotiana attenuata

Summary

A4A49_15284 (APX1) in coyote tobacco (Nicotiana attenuata) encodes a haem peroxidase with L-ascorbate peroxidase activity (EC 1.11.1.7). It is associated with the ascorbate-glutathione cycle, cellular response to oxidative stress, nitrogen fixation, cell wall thickening, and positive regulation of stomatal complex development. The gene is linked to traits including hydrogen peroxide content, shoot dry weight, bacterial blight disease resistance, net photosynthetic rate, water use efficiency, days to flowering, seed viability, and floral organ size. It is also connected to phenotypes such as drought and heat stress tolerance, oxidative stress resistance, pathogen defense, leaf senescence, and photosynthetic activity. Related genes in other species are linked to salt, heat, and high-light stress tolerance, root development, and miRNA activity.