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Effect of accelerated ageing on the content and composition of polyphenolic complex of wheat (Triticum aestivum L.) grains

Author

Listed:
  • J. Lachman

    (Czech University of Agriculture in Prague, Czech Republic)

  • J. Dudjak

    (Czech University of Agriculture in Prague, Czech Republic)

  • M. Orsák

    (Czech University of Agriculture in Prague, Czech Republic)

  • V. Pivec

    (Czech University of Agriculture in Prague, Czech Republic)

Abstract

The influence of accelerated ageing test (AAT), i.e. of higher temperature and humidity, on the content and composition of phenolic compounds in the grains of five cultivars of wheat (Triticum aestivum L.) was studied in the years 1998 and 1999. Total polyphenols were determined spectrophotometrically by Folin-Ciocalteau's phenolic reagent and free phenolic acids by an HPLC method in control samples and after deterioration treatment (AAT) in the Ebi, Estica, Nela, Samanta and Šárka cultivars. Statistical significance of deterioration treatment, cultivar, cultivation site, and harvest year was proved. Content of total polyphenols increased during deterioration and levels of the individual free phenolic acid changed depending on their structures. Mean contents of total polyphenols varied from 600 to 960 mg/kg of dry matter. The increase caused by the AAT ranged between 0-20%, the greatest mean increase was observed in the cultivar Nela (by 19%). Sinapic acid (as high as 540 mg/kg of dry matter), 3-hydroxy-benzoic acid and 7-hydroxycoumarin were determined as the major phenolic acids and coumarins. A decrease of free phenolic acids containing methoxy groups in their molecules (sinapic and vanillic acids) and an increase of phenolic acids with free hydroxy groups (caffeic and gallic acids) was observed after deterioration treatment. Statistically significant (P ≤ 0.05) effect of AAT on the content of free phenolic acids was observed.

Suggested Citation

  • J. Lachman & J. Dudjak & M. Orsák & V. Pivec, 2003. "Effect of accelerated ageing on the content and composition of polyphenolic complex of wheat (Triticum aestivum L.) grains," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 49(1), pages 1-7.
    • Handle: RePEc:caa:jnlpse:v:49:y:2003:i:1:id:4081-pse
    DOI: 10.17221/4081-PSE
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    Cited by:

    1. A. Vollmannová & E. Margitanová & T. Tóth & M. Timoracká & D. Urminská & T. Bojňanská & I. Čičová, 2013. "Cultivar influence on total polyphenol and rutin contents and total antioxidant capacity in buckwheat, amaranth, and quinoa seeds," Czech Journal of Food Sciences, Czech Academy of Agricultural Sciences, vol. 31(6), pages 589-595.

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