Antioxidant and antimicrobial activities of the edible medicinal halophyte Tamarix gallica L. and related polyphenolic constituents

Tamarix gallica is a halophytic species having hepatotonic and stimulant properties, as it was traditionally used in the treatment of various liver disorders. Leaf and flower infusion have anti-inflammatory and anti-diarrheic proprieties. In this work, we have investigated antioxidant and antimicrob...

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Bibliographic Details
Published in:Food and chemical toxicology 2009-08, Vol.47 (8), p.2083-2091
Main Authors: Ksouri, Riadh, Falleh, Hanen, Megdiche, Wided, Trabelsi, Najla, Mhamdi, Baya, Chaieb, Kamel, Bakrouf, Amina, Magné, Christian, Abdelly, Chedly
Format: Article
Language:English
Subjects:
Anti-Infective Agents - chemistry
Anti-Infective Agents - pharmacology
Antimicrobial activity
antimicrobial properties
Antioxidant activity
Antioxidants
Antioxidants - chemistry
Antioxidants - pharmacology
Bacteria - drug effects
beta Carotene - chemistry
Biological and medical sciences
Biphenyl Compounds - chemistry
Candida
Candida - drug effects
catechin
Catechins
chemical concentration
chemical constituents of plants
Chromatography, High Pressure Liquid
Colorimetry
Disorders
Escherichia coli
Flavonoids
Flavonoids - chemistry
Flavonoids - pharmacology
Flowers
Flowers - chemistry
food pathogens
Foods
Free Radical Scavengers - chemistry
Free Radicals - chemistry
Free radicals-scavenging
Halophyte
halophytes
human pathogens
Inhibition
Iron Chelating Agents - chemistry
isoquercitrin
Leaves
Lipids
Medical sciences
medicinal plants
Microbial Sensitivity Tests
Micrococcus luteus
Oxidation-Reduction
pathogens
phenolic compounds
Phenolic source
Phenols - chemistry
Phenols - pharmacology
phytochemicals
Picrates - chemistry
plant extracts
Plant Extracts - chemistry
Plant Extracts - pharmacology
Plant Leaves - chemistry
plant organs
Plant poisons toxicology
Polyphenols
Superoxides - chemistry
syringic acid
Tamaricaceae - chemistry
Tamarix
Tamarix gallica
Tannins - chemistry
Toxicology
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Summary:Tamarix gallica is a halophytic species having hepatotonic and stimulant properties, as it was traditionally used in the treatment of various liver disorders. Leaf and flower infusion have anti-inflammatory and anti-diarrheic proprieties. In this work, we have investigated antioxidant and antimicrobial activities of leaf and flower extracts and their phenolic composition. Results showed that flowers exhibit a higher antioxidant activity as compared to the leaves, IC 50 values of the flower extracts are being 1.3 (β-carotene bleaching) to 19 times (lipid peroxidation inhibition) lower than those for leaves. Accordingly, flower extracts exhibited the highest total phenolic content (135.35 mg GAE/g DW) and RP-HPLC analysis showed that syringic acid, isoquercitin as well as catechin were the major phenolics. Furthermore, Tamarix extracts showed appreciable antibacterial properties against human pathogen strains. The mean inhibition zone was from 0 to 6.5 mm when the concentration increased from 2 to 100 mg/l. The strongest activity was recorded against Micrococcus luteus and the lowest activity was observed against Escherichia coli. Moreover, organ extracts show a weakly to moderate activity against the tested Candida. These findings suggest that Tamarix may be considered as an interesting source of antioxidants for therapeutic or nutraceutical industries and for food manufactures.
ISSN:0278-6915
1873-6351
DOI:10.1016/j.fct.2009.05.040