Occurrence and taxonomic significance of cysteine sulphoxides in the genus Allium L. (Alliaceae)

The content of the cysteine sulphoxides methiin, alliin, isoalliin, and propiin was studied in 72 Allium species, subspecies, cultivars, and land-races, three Tulbaghia species, Triteleia laxa, and the Brassicaceae Alliaria petiolata.