67.バラ主要香気成分2-phenylethanolの周期的発散リズムの制御機構(口頭発表)

概要

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2-Phenylethanol (2PE) is a dominant floral scent compound emitted from rose flowers, such as Rosa damascena Mill, R. 'Hoh-Jun', and R. ' Yves Piaget'. 2PE is produced from L-Phenylalanine (L-Phe) via phenylacetaldehyde (PAld) by the action of the two enzymes in the flowers of intact R. damascena and R. 'Hoh-Jun'. Under the constant temperature and huimidity, a rhythmic emission of 2PE was observed in the flowers of R. 'Hoh-Jun'. Furthermore, 2-phenylethyl p-D-glucopyranoside (2PEGlc) accumulated in the rose petals has been converted to 2PE by the action of p-glucosidase in the flowers. To investigate the function involved in the rhythmic emission of 2PE, we have designed the new method by using the flower petals removed from cut flowers of R. 'Yves Piaget'. Emission of 2PE lasts at least 96 h, and shows the maximum level in the light period under the 12L-12D conditions, whereas no such rhythmic emission was observed neither under the continuous light nor the continuous dark conditions. The details will be discussed on the endogenous levels of molecules, and the change in the expression of the corresponding genes involved in the biosynthesis and the emission of 2PE from L-Phe.
植物化学調節学会の論文
2007-10-05