AOS — Cicer arietinum

Summary

CaAOS (LOC101496543) on chickpea chromosome 4 encodes a cytochrome P450 protein with allene oxide synthase, colneleate synthase, allene-oxide cyclase, hydro-lyase, monooxygenase and oxidoreductase activities, binding heme and iron. It is associated with jasmonic acid and oxylipin biosynthesis, the epoxygenase P450 pathway, fatty acid and polyamine metabolism, and responses to wounding, jasmonic acid, stress, and fungal defence. The protein localises to the chloroplast membrane, thylakoid, envelope, plastid, mitochondria and cytosol. CaAOS is linked to drought and salt tolerance, male sterility, defective anther dehiscence, nectar secretion, somatic embryogenesis, virus resistance, herbivore defence, and cell death. Studies of related genes in other species connect the family to jasmonic acid production, wound signalling, stomatal closure, and resistance to insects and necrotrophic fungi.