Terpene alcohols play a central role for the characteristic bouquet of wine, but they mainly occur as aroma-inactive glycosides. The glycoside-forming glycosyltransferases (GT) have been rarely analyzed in grapes, yet. In this work ten putative terpene alcohol GT have been heterologously expressed and the substrate specificity analyzed. Four enzymes showed the desired activity and were characterized in detail. The results may be used in future breeding programs for the development of new genotypes with reduced GT activity and improved aroma quality.
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Terpene alcohols play a central role for the characteristic bouquet of wine, but they mainly occur as aroma-inactive glycosides. The glycoside-forming glycosyltransferases (GT) have been rarely analyzed in grapes, yet. In this work ten putative terpene alcohol GT have been heterologously expressed and the substrate specificity analyzed. Four enzymes showed the desired activity and were characterized in detail. The results may be used in future breeding programs for the development of new genotyp...
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