Biotransformation of (R)-(+)-Limonene by the Psychrotrophic Fungus Mortierella minutissima in H2O2-Oxygenated Culture
| Autor: | Mariusz Trytek, Marcin Skowronek, Jan Fiedurek |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Food Technology and Biotechnology, Vol 47, Iss 2, Pp 131-136 (2009) |
| Druh dokumentu: | article |
| ISSN: | 1330-9862 1334-2606 |
| Popis: | The aim of the present work is to investigate an integration of a microbial reaction system for the oxidation of limonene using a psychrotrophic strain with an unconventional oxygenation of the culture. The alternative method for increasing the dissolved oxygen concentration in culture media for biotransformation of R-(+)-limonene by Mortierella minutissima 01 is based on catalase-mediated decomposition of hydrogen peroxide (H2O2) into oxygen and water. Automated addition of H2O2 into the bioreactor made it possible to keep the dissolved oxygen concentration constant over a range from 5 to 100 % (±2 %). Perillyl alcohol and perillyl aldehyde were the main products of the limonene biotransformation. The amounts of perillyl alcohol produced during H2O2-oxygenated culture of M. minutissima 01 were over 2-fold higher in comparison with classical, stirred aeration. Some factors affecting the biotransformation yield were also investigated. The addition of 0.3 % methanol enhanced 1.4-fold the perillyl alcohol production by M. minutissima 01. A maximum yield of this product (258.1 mg/L) was observed between 2 and 3 days of cultivation in a medium containing 0.5 % substrate at 15 °C, pH=6.0. The bioconversion activity increased over 3.6-fold after optimization of some biotransformation conditions. |
| Databáze: | Directory of Open Access Journals |
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