Biosynthesis of cruciferous phytoalexins: the involvement of a molecular rearrangement in the biosynthesis of brassinin
Abstract
Incorporation of [4′-2H], [2-13C]tryptophan, and [methyl-2H3]brassinin 1 into spirobrassinin 3 by UV-irradiated turnip tissue indicates that spirobrassinin 3 is formed via brassmin 1, which is biosynthesized from tryptophan by a pathway involving a molecular rearrangement and possible formation of indol-3-ylmethyl isothiocyanate 6a.