Biotransformation of acyclic monoterpenoids by Debaryomyces sp., Kluyveromyces sp., and Pichia sp. strains of environmental origin |
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Authors: | Ponzoni Chiara Gasparetti Chiara Goretti Marta Turchetti Benedetta Pagnoni Ugo Maria Cramarossa Maria Rita Forti Luca Buzzini Pietro |
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Institution: | Dipartimento di Chimica, Università di Modena e Reggio Emilia, Via Campi 183, I-41100 Modena. |
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Abstract: | Sixty yeast strains, which belong to 32 species of the genera Debaryomyces, Kluyveromyces, and Pichia, and which were isolated from plant-, soil- or insect-associated habitats, were screened for their ability to biotransform the acyclic monoterpenes geraniol and nerol. The aptitude to convert both compounds (from 2.6 to 30.6, and from 2.7 to 29.1%/g cell DW (=dry weight), resp.) was apparently a broad distributed character in such yeasts. Depending upon the substrate used, the production of linalool, alpha-terpineol, beta-myrcene, D-limonene, (E)-beta-ocimene, (Z)-beta-ocimene, or carene was observed. Linalool was the main product obtained from geraniol, whereas linalool and alpha-terpineol were the main products obtained through the conversion of nerol. Yet, differently from nerol, the aptitude to exhibit high bioconversion yields of geraniol to linalool was an apparently genus-related character, whereas the ability to produce other monoterpenes was a both genus- and habitat-related character. The possible pathways of bioconversion of geraniol or nerol to their derivatives were proposed/discussed. |
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Keywords: | Biotransformations Monoterpenoids Debaryomyces species Kluyveromyces species Pichia species |
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