Document Detail

Composition and properties of biologically active pectic polysaccharides from leek (Allium porrum).
MedLine Citation:
PMID:  20572062     Owner:  NLM     Status:  In-Process    
BACKGROUND: Leek (Allium porrum) is very commonly used vegetable in Bulgaria and is distinctive with high content of bioactive components1. Previously2 we obtained five crude pectic polysaccharides from leek through consecutive extraction. Some of them appeared to be good stimulators of the immune system. Schols and Voragen3 investigated the composition of modified hairy regions of pectic polysaccharides isolated from leek cell walls. Samuelson et al.4 identified the polysaccharide structures encountered in hairy regions as bioactive. The aim of this work was to study the isolation, composition and biological activities of pectic polysaccharides from leek.
RESULTS: Two pectic polysaccharides from leek were isolated through consecutive water and acid extraction. The water extractable pectin had higher polyuronic content, higher protein content and lower neutral sugar content. It was found that next to galacturonic acid they also contain glucuronic acid in ratio 9:1 for the water- and 3:1 for the acid-extractable polysaccharide. The main neutral sugar was galactose. The water-extractable pectic polysaccharide had higher molecular weight (10(6) Da) and homogeneity. It was shown that the pectic polysaccharides from leek have considerable immunostimulating activities.
CONCLUSION: Leek polysaccharides have relatively high galacturonic and glucuronic acid content and are distinguished with high biological activity.
Maria Kratchanova; Mariana Nikolova; Elena Pavlova; Irina Yanakieva; Veselin Kussovski
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the science of food and agriculture     Volume:  90     ISSN:  1097-0010     ISO Abbreviation:  J. Sci. Food Agric.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376334     Medline TA:  J Sci Food Agric     Country:  England    
Other Details:
Languages:  eng     Pagination:  2046-51     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Society of Chemical Industry.
Institute of Organic Chemistry with Center of Phytochemistry, Laboratory of Biologically Active Substances, Bulgarian Academy of Sciences, 4000 Plovdiv, Bulgaria.
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