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KMID : 0903519930360050000
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1993 Volume.36 No. 5 p.0 ~ p.0
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Biotransformation of Monoterpenes by Mentha piperita Suspension Culture
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Kim, Soo Un
Park, Si Hyung/Lim, Yoong Ho
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Abstract
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The metabolic capability of the cultured cells of peppermint was tested by feeding appropriate exogenous substrates to the suspension cultures. Conversion of (-)-limonene into any other monoterpenes was not observed with suspension cultures. (+)-Pulegone was converted into (+)-isomenthone and (-)-menthone, and (-)-menthone into (-)-menthol. (-)-Isopiperitenone was transformed into new monoterpense as well as (+)-pulegone and piperitenone. Structure of one of the new monoterpenes, (-)-7-hydroxyisopiperitenone, was identified by 2D-NMR, HRMS, IR and UV-Vis. Structural evidence of the other minor new monoterpenes, (6R)- and (6S)-6-hydroxyisopiperitenone is presented. The experiments confirmed that the suspension retained most of the menthol biosynthesis pathway in the cell, but its enzyme activities were low and different at branching point compared to that of field grown peppermint.
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