Document Detail


Bioactive Polyphenols in Leaves, Stems and Berries of Saskatoon (Amelanchier alnifolia Nutt.) Cultivars.
MedLine Citation:
PMID:  22220589     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The Saskatoon berry is currently cultivated in many parts of the world for its suitability for various food products and due to the high content of nutrients and polyphenols. To determine the phytochemical profile of a Saskatoon plant, polyphenols from leaves, stems and berries were screened from four cultivars grown in Finland using HPLC-DAD and HPLC-ESI/MS. The phenolic composition and concentrations varied among plant parts and cultivars. Main berry components were cyanidin-based anthocyanins (63% of the phenols), quercetin-derived flavonol glycosides and hydroxycinnamic acids. The total anthocyanin content varied between 258.7 and 517.9 mg/100 fresh weight among cultivars. The protocatechuic acid was found for the first time in Saskatoon berries. The leaves consisted of quercetin and kaempferol derived glycosides (41% of the phenols), hydroxycinnamic acids (36 %), catechins and some neolignans. Quercetin 3-galactoside and 3-glucoside, (-)-epicatechin and chlorogenic acid were the main phenolics in the leaves of all cultivars. The stem components were flavanone and flavonol glycosides (55% of the phenols), catechins (38%) and hydroxybenzoic acids. Concentrations of the main compound, eriodictyol 7-glucoside, varied among cultivars from 3.3 to 6.5 mg/g of stem dry weight. The very high proanthocyanidin content was found in stems and leaves (10-14% of dry biomass), while berries contained a low amount of proantocyanidins (3% of dry biomass). Our findings reveal that leaves and stems of Saskatoon cultivars possess high amount of variable phenolic compounds that may offer new functional raw materials for a wide range of food and health products.
Authors:
Anu Lavola; Reijo Karjalainen; Riitta Julkunen-Tiitto
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-1-5
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-1-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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