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Molecules 2013, 18(5), 4942-4954; doi:10.3390/molecules18054942

Phenolic Constituents, Antioxidant and Preliminary Antimycoplasmic Activities of Leaf Skin and Flowers of Aloe vera (L.) Burm. f. (syn. A. barbadensis Mill.) from the Canary Islands (Spain)

1
Departamento de Química, Universidad de Las Palmas de Gran Canaria, Unidad Asociada al CSIC, Campus de Tafira, 35017 Las Palmas de Gran Canaria, Canary Islands, Spain
2
Unidad de Epidemiología y Medicina Preventiva, Facultad de Veterinaria, Universidad de Las Palmas de Gran Canaria, C/Trasmontaña s/n, Arucas, 35413, Islas Canarias, Spain
*
Author to whom correspondence should be addressed.
Received: 19 February 2013 / Revised: 19 April 2013 / Accepted: 23 April 2013 / Published: 26 April 2013
(This article belongs to the Special Issue Phytochemicals: Analytical and Medicinal Chemistry)
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Abstract

The methanol extracts of leaf skins and flowers of Aloe vera from the Canary Islands were analyzed for their phenolic profiles and screened for their antioxidant and antimycoplasmic activities. The use of reversed phase high performance liquid chromatography (RP-HPLC) allowed the identification of 18 phenolic constituents. Leaf skin extracts were characterized by the abundance of catechin, sinapic acid and quercitrin. Gentisic acid, epicatechin and quercitrin were the most prominent phenolic compounds of the flowers. The in vitro antioxidant activities determined by using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric antioxidant reducing power (FRAP) assays revealed that both extracts exhibited antioxidant activity, being the leaf skin extract the most active fraction. The leaf skin extract was also found to be active against the microbial strains tested. Therefore, A. vera extracts from leaf skin and flowers can be considered as good natural antioxidant sources.
Keywords: Aloe vera; leaf skin; phenolic constituents; antioxidant activity; antimycoplasmic activity Aloe vera; leaf skin; phenolic constituents; antioxidant activity; antimycoplasmic activity
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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López, A.; de Tangil, M.S.; Vega-Orellana, O.; Ramírez, A.S.; Rico, M. Phenolic Constituents, Antioxidant and Preliminary Antimycoplasmic Activities of Leaf Skin and Flowers of Aloe vera (L.) Burm. f. (syn. A. barbadensis Mill.) from the Canary Islands (Spain). Molecules 2013, 18, 4942-4954.

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