Biogenesis of 2-Phenylethanol in Rose Flowers : Incorporation of [^2H_8]L-Phenylalanine into 2-Phenylethanol and its β-D-Glucopyranoside during the Flower Opening of Rosa 'Hoh-Jun' and Rosa damascena Mill.(Food & Nutrition Science)

概要

論文の詳細を見る
To clarify the biosynthetic pathway to 2-phenylethanol (2), the deuterium-labeled putative precursor, [^2H_8]L-phenylalanine ([^2H_8-1]), was fed to the flowers of Rosa 'Hoh-Jun' and R. damascena Mill. throughout maturation, ceasing feeding at the commencement of petal unfurling and at full bloom. Based on GC-MS analyses, [^2H_8]-1 was incorporated into both 2 and 2-phenylethyl β-D-glucopyranoside (3) when the flowers were fed until full bloom, whereas no such incorporation into 2 was apparent when feeding was ceased earlier. In both species of rose, the labeling pattern for 2 was almost identical to that for 3, and indicated the presence of [^2H_6]-, [^2H_7]- and [^2H_8]-2, and [^2H_6]-, [^2H_7]- and [^2H_8]-3. This may be ascribed to the equilibrium between 2 and 3. The labeling pattern for 2 and 3 also indicated that these compounds were produced from 1 via several routes, the route involving phenylpyruvic acid being the major one.
2002-05-23