AOS — Nicotiana attenuata

Summary

A4A49_10329 (AOS, AOS1) encodes a cytochrome P450 allene oxide synthase with allene oxide cyclase and colneleate synthase activities, localising to the chloroplast membrane and thylakoid. In Nicotiana attenuata, this gene is associated with jasmonic acid and oxylipin biosynthesis, polyamine and nicotine metabolism, carpel development, floral organ abscission, and responses to fungi and jasmonic acid. It is linked to photosynthetic rate, bacterial and fungal resistance, nectar secretion, salt tolerance, somatic embryogenesis, virus resistance, male sterility, and defence against insect herbivory and necrotrophic fungi. Studies of related genes in other species connect the AOS family to additional traits including grain size, yield, starch content, carotenoid levels, cold tolerance, aphid resistance, and herbivore-induced volatile emission.