Medicinal plant essential oils associated with biofilm to protect papaya fruits

Abstract

The objective of this work was to associate the use of biofilms to Lippia sidoides (Lippia) and Morinda citrifolia (Noni) essential oils and their respective major constituents in post-harvest quality components. The evaluations in this study were chromatographic analysis the essential oils, fruit mass reduction effect, total soluble solids, peel color and fruit firmness. Regarding the adjustment and viability of the essential oil concentrations to be used in the treatments, a phytotoxicity test was performed. The main constituent found in Noni essential oil was octanoic acid, while for Lippia essential oil was thymol. The concentration of 3% of Noni and Lippia essential oils was the maximum to reach an acceptable level of phytotoxicity on papaya fruit peel. The paraffin + L. sidoides and paraffin + M. citrifolia treatments achieved the lowest reduction in pulp mass. In relation to total soluble solids, treatments did not show a significant difference. The best result for firmness was found in sunflower oil + noni coating. Sunflower oil + noni and sunflower oil + octanoic acid were the treatments that maintained normal yellow color in fruits for longer time.

Compositional characteristics and antibacterial activity of essential oils in citrus hybrid peels

“…The essential oils from citrus peels were extracted using the hydrodistillation method in Clevenger apparatus (Choi, 2012;Osorio et al, 2021). Briefly, the essential oils were separated from citrus peels with 70% water vapor for 8 h using an essential oil extractor (EssenLab-Plus, Hanil Labtech, Yangju, Korea).…”

Chemical characterization of different parts of noni (Morinda citrifolia) fruit and its freeze-dried pulp powder with emphasis on its bioactive compounds and antioxidant activities

“…Noni is used by the pharmaceutical and cosmetic industries due to the pharmacological activities of its metabolites (Ruhomally et al, 2015) and has antibacterial, antiviral, antifungal, antitumor, anthelmintic, analgesic, hypotensive, anti-inflammatory and immunological properties (Abou Assi et al, 2017). In addition, Osorio et al (2021) suggest that the chemical constituents present in the essential oil of Morinda citrifolia at 2% are of interest for its usage in the form of biofilms, prolonging the shelf life of perishable fruits stored at room temperature.…”