AOS — Phaseolus vulgaris

Summary

PHAVU_009G061325 (PvAOS, also known as PvDDE2 or PvCYP74A) on chromosome 9 of French bean encodes a cytochrome P450 family protein with allene oxide synthase, allene-oxide cyclase, colneleate synthase, hydro-lyase, monooxygenase and oxidoreductase activities, binding heme and iron. The gene is associated with jasmonic acid and oxylipin biosynthesis, fatty acid and polyamine metabolism, nitrogen fixation and nodulation. It is linked to defence responses to fungi, wounding, herbivory and necrotrophic pathogens, as well as to male sterility, defective anther dehiscence, sepal senescence, floral organ abscission, nectar secretion, cell death, salt tolerance, sorbitol stress, virus resistance, somatic embryogenesis and reduced trichome density. The encoded protein localises to the chloroplast membrane, thylakoid, envelope, plastid, mitochondria and cytosol. Studies of related genes in other species connect the family to drought tolerance, heat stress, stomatal regulation, aphid resistance and carotenoid content.