Abstract:
:In vivo feeding experiments with [5,5-(2)H(2)]mevalonic acid lactone (MVL) and [5,5-(2)H(2)]-1-deoxy-D-xylulose (DOX) indicate that the novel mevalonate-independent 1-deoxy- D-xylulose 5-phosphate/2C-methyl- D-erythritol 4-phosphate (DOXP/MEP) pathway is the dominant metabolic route for monoterpene biosynthesis in grape berry exocarp and mesocarp and in grape leaves. The highly uneven distribution of the monoterpene alcohols (3S)-linalool and geraniol between leaves, berry exocarp and berry mesocarp can be attributed to a compartmentation of monoterpene metabolism. In grape berries incorporation of [5,5-(2)H(2)]-DOX into geraniol is mainly restricted to the exocarp, whereas (3S)-linalool biosynthesis can be detected in exocarp as well as in mesocarp tissue. The results demonstrate that grape berries exhibit an autonomic monoterpene biosynthesis via the novel DOXP/MEP route throughout the ripening process.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Luan F,Wüst Mdoi
10.1016/s0031-9422(02)00147-4subject
Has Abstractpub_date
2002-07-01 00:00:00pages
451-9issue
5eissn
0031-9422issn
1873-3700pii
S0031942202001474journal_volume
60pub_type
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