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Influence of the Production Method on Phytochemical Concentrations in Whole Wheat (Triticum aestivum L.): A Comparative Study

Stracke, Berenike A.; Eitel, Joachim; Watzl, Bernhard; Mäder, Paul and Rüfer, Corinna E. (2009) Influence of the Production Method on Phytochemical Concentrations in Whole Wheat (Triticum aestivum L.): A Comparative Study. Journal of Agricultural and Food Chemistry, 57 (21), pp. 10116-10121.

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Online at: http://www.ncbi.nlm.nih.gov/pubmed/19817369

Summary

The present study was performed to evaluate the concentrations of phytochemicals (carotenoids and phenolic acids) in wheat varieties grown under comparable organic and conventional conditions over three years as part of a long-term field trial. Phenolic acids of the hydroxybenzoic acid and hydroxycinnamic acid group were quantified by HPLC-DAD after extraction as free, soluble conjugated, and bound forms. Furthermore, the carotenoids lutein and zeaxanthin were determined by HPLC-DAD. There were no statistically significant differences between the two farming systems (sum of carotenoids (microg/g) for 2003, 0.91 +/- 0.55 organic vs 0.96 +/- 0.34 conventional; for 2005, 1.61 +/- 0.22 organic vs 1.33 +/- 0.19 conventional; for 2006, 0.87 +/- 0.33 organic vs 0.83 +/- 0.11 conventional; sum of phenolic acids (microg/g) for 2003, 448.4 +/- 151.1 organic vs 327.3 +/- 232.8 conventional; for 2005, 502.8 +/- 168.3 organic vs 484.4 +/- 111.2 conventional; for 2006, 659.1 +/- 112.5 organic vs 945.9 +/- 353.6 conventional). However, statistically significant year-to-year differences up to 55% were observed. Taken together, these results indicate that climate factors have a greater impact on the phytochemical concentrations in whole wheat than the production method (organic/conventional).


EPrint Type:Journal paper
Keywords:Bodenwissenschaften, Systemvergleich, Langzeitversuch, Weizensorten, Pflanzeninhaltsstoffe
Subjects: Crop husbandry > Production systems > Cereals, pulses and oilseeds
Soil
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences
Germany > Federal Research Institute of Nutrition and Food - MRI > Department of Physiology and Biochemistry of Nutrition
ISSN:0021-8561
DOI:10.1021/jf901267z
Deposited By: Mäder, Paul
ID Code:26386
Deposited On:17 Jun 2014 19:42
Last Modified:17 Jun 2014 19:42
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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