Document Detail


Polyphenol contents and antioxidant activities of extracts from flowers of two Crataegus azarolus L. varieties.
MedLine Citation:
PMID:  19634468     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Phenolic contents of the ethyl acetate extracts prepared from floral buds and opened flowers harvested on Crataegus azarolus trees native in two localities were performed. The antioxidant activity was measured by DPPH' (2,2-diphenyl-picrylhydrazyl), ABTS+ (2,2'-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radicals scavenging using spectrophotometric method. The C. azarolus var. aronia (Willd.) Batt., producing yellow fruits, was richer in total phenols (1638.7 +/- 89.9 mg acid gallic/100 g dry weight) according to C. azarolus var. eu-azarolus Maire (1415.5 +/- 23.8 mg acid gallic/100 g dry weight), producing red ones. Ethyl acetate extract from opened flowers has less content in total phenols, proanthocyanidins and flavonoids compared to this from floral buds. Floral buds from the two C. azarolus varieties occurring in Siliana-Djebel Serdj showed the highest radical scavenging activities (2431.8 +/- 32.7 and 2267.7 +/- 22.7 micromol Trolox/100 g dry weight). Hawthorn from Tunisia contains eight antioxidants of phenolic type (chlorogenic acid, hyperoside, rutin, spiraeoside, isoquercitrin, quercetin, (-)-epicatechin and the dimer procyanidin B2). These compounds identified specially in floral bud extracts presented a strong radical-scavenging activity.
Authors:
R Bahri-Sahloul; S Ammar; R B Fredj; S Saguem; S Grec; F Trotin; F H Skhiri
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pakistan journal of biological sciences: PJBS     Volume:  12     ISSN:  1028-8880     ISO Abbreviation:  Pak. J. Biol. Sci.     Publication Date:  2009 May 
Date Detail:
Created Date:  2009-07-28     Completed Date:  2009-08-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101247723     Medline TA:  Pak J Biol Sci     Country:  Pakistan    
Other Details:
Languages:  eng     Pagination:  660-8     Citation Subset:  IM    
Affiliation:
Faculty of Science Tunis, Campus Universitaire, 1060 Tunis El Manar, Tunisia.
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MeSH Terms
Descriptor/Qualifier:
Antioxidants / analysis*
Crataegus* / anatomy & histology,  chemistry
Flavonoids / analysis*
Flowers / chemistry*
Free Radical Scavengers / chemistry
Humans
Phenols / analysis*
Plant Extracts / analysis*
Plants, Medicinal / anatomy & histology,  chemistry
Proanthocyanidins / analysis
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Flavonoids; 0/Free Radical Scavengers; 0/Phenols; 0/Plant Extracts; 0/Proanthocyanidins; 0/polyphenols

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