Impact of Drying Method on the Bioactive Compounds in Extracts from the Leaves of Moroccan Myrtus Communis L

Abstract

This study examines the impact of different drying methods on the secondary metabolites and antioxidant activity of the leaves of Moroccan Myrtus communis L., an important aromatic and medicinal plant. The fresh plant material collected was treated with five drying methods before the methanolic extraction of the dry leaves. The results show that the choice of drying method significantly influences the preservation of bioactive compounds. Indirect HD drying proved to be the most effective method for maintaining extract quality, particularly in terms of preserving polyphenols and antioxidant activity. However, air drying also showed promising results, offering an economical and sustainable alternative. The variability observed between the different compounds (polyphenols, flavonoids, sugars) underlines the need for a nuanced approach in the choice of drying method, depending on the specific compounds of interest. These results highlight the importance of the choice of drying method in optimizing the quality of Myrtus communis L. leaf extracts. This research provides a solid basis for optimizing drying practices in the aromatic and medicinal plant industry in Morocco, while highlighting the importance of a holistic approach that takes into account economic, environmental and practical aspects.