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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Comparative study of different cocoa (Theobroma cacao L.) clones in terms of their phenolics and anthocyanins contents
Journal of Food Composition and Analysis, Volume 19, No. 6-7, Year 2006
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Description
Polyphenols were analysed at 280 nm by HPLC device using a Photodiode Array Detector (PDA). Anthocyanins were separated with the SEP-PAK Vac 6cc 1000 mg (Waters) column and measured at 520 nm with a PDA. Nineteen cacao clones from Cameroon genebank were analysed. Fresh and fermented-like seeds were used. Two main polyphenols were present in our samples: catechin and epicatechin. Epicatechin represents 2-4% DM of defatted cocoa seed powder. Undefined substances called A, B and C were also found in cocoa seeds. Substance A is discussed as a derivative of caffeic acid and an ester-bound compound. Substances B and C are oligomeres of proanthocyanidins. Protocatechiuc acid and quercetin were not detected. Two anthocyanins were found in cocoa seeds: cyanidin-3-galactoside and cyanidin-3-arabinoside. They represent 0.02-0.4% DM of defatted cocoa seed powder. Total phenols, catechin, epicatechin and anthocyanin in fresh and fermented-like beans were genotype-dependent. Polyphenols from seeds of two different pods from the same clone showed a quantitative significant difference. Spearman's correlation test showed that there is no correlation between the number of seeds per pod, weight of pod and content of polyphenolic compounds. Nevertheless, a negative correlation was found between the number of seeds per pod and the catechin content (r = - 0.4 6 3, P < 0.0 1). Groupings of samples were observed using PCA and hierarchical cluster analysis. The separation between groups is related to their polyphenol and anthocyanin contents. © 2005 Elsevier Inc. All rights reserved.
Authors & Co-Authors
Niémenak, Nicolas
Cameroon, Yaounde
Higher Teacher's Training College
Rohsius, Christina
Germany, Hamburg
Universität Hamburg
Elwers, Silke
Germany, Hamburg
Universität Hamburg
Omokolo Ndoumou, D.
Cameroon, Yaounde
Higher Teacher's Training College
Lieberei, Reinhard
Germany, Hamburg
Universität Hamburg
Statistics
Citations: 136
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.1016/j.jfca.2005.02.006
ISSN:
08891575
Research Areas
Genetics And Genomics
Study Approach
Quantitative
Study Locations
Cameroon