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Alternations in phenolic acids content in developing rye grains in normal environment and during enforced dehydration

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Abstract

A series of high pressure liquid chroamtography analyses revealed the presence of five phenolic acids in rye caryopses (vanillic, caffeic, p-coumaric, ferulic and sinapic), three of which (p-coumaric, ferulic and sinapic) were found in the free phenolic fraction. Ferulic acid was predominant, both among free acids and total phenolic acids (i.e. free, liberated from soluble esters and glycosides). The highest content of the free phenolic acids in rye caryopses was observed at the beginning of development, when on 22 DAF it was estimated at 11.55 µg·g−1 DW. During dehydratation the total level of free phenolic acids in rye caryopses decreased in all investigated samples. Although total phenolic acids contents in all samples of unripe rye caryopses always decreased after dehydration, in rye sample collected in full ripeness (57 DAF), the amount of these compounds increased after the enforced dehydration. It should be added that in ester-bound-soluble phenolic acids fraction (the largest part in the total phenolic acids fraction), irrespective of the total amount decrease, much increase of sinapic acid content in this fraction was observed after dehydratation treatment in all investigated samples of caryopses of various ripeness. During the development and ripening of rye caryopses, a gradual increase in the precocious germination ability of the grain was observed. The enforced dehydration stimulated the process of precocious germination of developing and ripening rye caryopses. A possible role of phenolics in preventing precocious germination and acclimation to dehydration of developing and ripening rye grains is discussed.

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Correspondence to Stanisław Weidner.

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Weidner, S., Frączek, E., Amarowicz, R. et al. Alternations in phenolic acids content in developing rye grains in normal environment and during enforced dehydration. Acta Physiol Plant 23, 475–482 (2001). https://doi.org/10.1007/s11738-001-0058-1

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  • DOI: https://doi.org/10.1007/s11738-001-0058-1

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