Subscribe Now Subscribe Today
Science Alert
 
FOLLOW US:     Facebook     Twitter
Blue
   
Curve Top
Pakistan Journal of Biological Sciences
  Year: 2009 | Volume: 12 | Issue: 9 | Page No.: 660-668
DOI: 10.3923/pjbs.2009.660.668
Polyphenol Contents and Antioxidant Activities of Extracts from Flowers of Two Crataegus azarolus L. Varieties
R. Bahri-Sahloul, S. Ammar, R.B. Fredj, S. Saguem, S. Grec, F. Trotin and F.H. Skhiri

Abstract:
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 μmol 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.
 [Fulltext PDF]   [Fulltext HTML]   [XML: Abstract + References]   [References]   [View Citation]  [Report Citation]
 RELATED ARTICLES:
  •    Optimization of the Extraction of Total Phenolic Compounds from Sunflower Meal and Evaluation of the Bioactivities of Chosen Extracts
  •    How to Cope with Dengue in Developing Countries Like Pakistan?
  •    Antioxidant and Anticoagulant Properties of Phyllanthus fraternus GL Webster (Family: Euphorbiaceae)
How to cite this article:

R. Bahri-Sahloul, S. Ammar, R.B. Fredj, S. Saguem, S. Grec, F. Trotin and F.H. Skhiri, 2009. Polyphenol Contents and Antioxidant Activities of Extracts from Flowers of Two Crataegus azarolus L. Varieties. Pakistan Journal of Biological Sciences, 12: 660-668.

DOI: 10.3923/pjbs.2009.660.668

URL: https://scialert.net/abstract/?doi=pjbs.2009.660.668

 
COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 

Curve Bottom