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Molecules 2015, 20(3), 4720-4734; doi:10.3390/molecules20034720

Antimicrobial and Antioxidant Activities and Phenolic Profile of Eucalyptus globulus Labill. and Corymbia ficifolia (F. Muell.) K.D. Hill & L.A.S. Johnson Leaves

1
Faculty of Geography, Babeș-Bolyai University, 5-7, Clinicilor Street, Cluj-Napoca 400006, Romania
2
Faculty of Environmental Sciences and Engineering, Babeș-Bolyai University, 30, Fântânele Street, Cluj-Napoca 400294, Romania
3
Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, 11, A. Janos Street, Cluj-Napoca 400028, Romania
4
Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, 3-5, Manăştur Street, Cluj-Napoca 400372, Romania
5
Faculty of Pharmacy, Iuliu Hatieganu University of Medicine and Pharmacy, 8, V. Babes Street, Cluj-Napoca 400010, Romania
*
Authors to whom correspondence should be addressed.
Academic Editor: Maurizio Battino
Received: 23 January 2015 / Revised: 22 February 2015 / Accepted: 9 March 2015 / Published: 16 March 2015
(This article belongs to the Section Natural Products)
View Full-Text   |   Download PDF [735 KB, uploaded 16 March 2015]   |  

Abstract

This study was performed to evaluate the in vitro antimicrobial and antioxidant activities and the phenolic profile of Eucalytus globulus Labill. and Corymbia ficifolia (F. Muell.) K.D. Hill & L.A.S. Johnson leaves. Both leave extracts contain significant amounts of phenolic compounds, mainly flavonoids. Qualitative and quantitative analyses of the phenolic compounds were performed using a HPLC/MS method. The main flavonoid was hyperoside and its highest amount was found in E. globulus (666.42 ± 5.02 μg/g dw plant material). Regarding the flavonol profile, myricetin was the dominant compound and its highest amount was found in C. ficifolia leaves (124.46 ± 0.24 μg/g dw plant material). The antioxidant activity was evaluated by DPPH, TEAC, hemoglobin ascorbate peroxidase activity inhibition (HAPX) and inhibition of lipid peroxidation catalyzed by cytochrome c assays, revealing an important antioxidant potential for both species. In the antimicrobial assays, C. ficifolia extract was found to be more active than E. globulus against both Gram-positive and Gram-negative bacterial strains with the exception of Bacillus subtilis. The results of the present study provide new valuable data regarding the bioactivities of these medicinal species. View Full-Text
Keywords: Eucalyptus globulus; Corymbia ficifolia; antimicrobial; antioxidants; phenolics Eucalyptus globulus; Corymbia ficifolia; antimicrobial; antioxidants; phenolics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Dezsi, Ș.; Bădărău, A.S.; Bischin, C.; Vodnar, D.C.; Silaghi-Dumitrescu, R.; Gheldiu, A.-M.; Mocan, A.; Vlase, L. Antimicrobial and Antioxidant Activities and Phenolic Profile of Eucalyptus globulus Labill. and Corymbia ficifolia (F. Muell.) K.D. Hill & L.A.S. Johnson Leaves. Molecules 2015, 20, 4720-4734.

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