## 1 Introduction  
Carvone (\(p\)-mentha-6.8-dien-2-one) is one of the most frequently cited examples of odoriferous compounds where both enantiomers differ in smell. The (4\(R\))-(-)-carvone (**1**) with a mint odor is a component of the oil of _Mentha viridis_ and _Mentha spicata_. Next to (**1**), dihydrocarveol, _cis_-dihydrocarvone (**2**) are also present in the latter essential oil [1]. In turn, (4\(S\))-(+)-carvone (**6**) has a caraway fragrance and is found in essential oil obtained from _Carum carvi_ L. and _Antehun gawvelens_ L. [2]. As a scented compound, carvone is used in the production of cosmetics, toothpastes, and chewing gum [3]. It also has a number of interesting biological activities such as anticancer [4, 5] and free radical scavenging activities [6]. It may also be a potential inhibitor of acetylcholinesterase (AChE) [7].  
Both carvone isomers are used as the starting material in the synthesis of many other biologically active compounds such as dihydroagarofuran and eudesmane sesquiterpenoids [8],guiaiane sesquiterpenes [9], polyoxygenated atisane-type and spongiane-type diterpenoids [10], 8,14-secosteroids [3], remorensic acid [11], and cryptophycin A [12]. Often, the first step in their synthesis is a stereoselective reduction of the double bond.  
In order to obtain other odoriferous compounds, carvone has also been biotransformed using a variety of biocatalysts. During microbiological and plant transformations, the formation of reaction products where the carbonyl group or double bond is reduced in addition to hydroxylation on the inactivated carbon atom is observed [13; 14].  
To transform carvone, the following plant fragments were used: roots of _Manilhot esculenta_ [PERSON] and _Manilhot dulcis_ [PERSON] [15], sugar cane juice from _Sacharum officinarum_ L. [16], and coconut water from _Cocos nucifera_ L. [17]. Only the reduction of carvone to carvone was observed, and the degree of substrate conversion did not exceed 15%. Therefore, we decided to choose new vegetables and fruits as biocatalysts for obtaining enantiomerically pure carvool, which is commercially unavailable.  
Plant biocatalysts are adept at carrying out a number of reactions, including the reduction of aldehydes, ketones [18; 19], and ketoesters [20] as well as the oxidation of alcohols or the hydrolysis of acetates. Besides carvots, the active reagents used in the abovementioned reactions were celeriac, potatoes, Jerusalem artichoke [21], apples, onions, and others. It is not known what types of enzymes are involved in these reactions. Considering the wide range of obtainable, taxonomically different plants, in the future, it would be feasible to use biocatalysts for practically every reaction. The general benefits of plants as reagents are that they are easily disposed because they are biodegradable, they have mild reaction conditions, and are available at low cost.  
Thus far, little information about the transformation of carvone using fragmented vegetables is available in the literature; to address this research gap, the biotransformation of both carvone isomers via the comminuted plant material of five vegetables and three fruits is presented in this paper.