https://doi.org/10.4081/ija.2017.848

Effects of sprouting and salt stress on polyphenol composition and antiradical activity of einkorn, emmer and durum wheat

Vol. 12 No. 4 (2017)
Submitted: 10 October 2016
Accepted: 15 February 2017
Published: 11 December 2017
Salt stress, Phenolic acids, Triticum monococcum L. ssp. monococcum, Triticum turgidum L. ssp. dicoccum, Triticum turgidum L. ssp. durum
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Authors

  • Fabio Stagnari • fstagnari@unite.it Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
  • Angelica Galieni Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo; 2Research Centre for Vegetable and Ornamental Crops, Council for Agricultural Research and Economics, Monsampolo del Tronto (AP), Italy.
  • Sara D'Egidio Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
  • Beatrice Falcinelli Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy.
  • Giancarlo Pagnani Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
  • Roberta Pace CGS Seeds, Acquasparta (TR), Italy.
  • Michele Pisante Faculty of Bioscience and Technologies for Food, Agriculture and Environment, University of Teramo, Teramo, Italy.
  • Paolo Benincasa Department of Agricultural, Food and Environmental Sciences, University of Perugia, Perugia, Italy.
Germination is related with improvements of nutritional value of seeds, since it promotes accumulation of health-promoting phytochemicals. However, only few studies have investigated on phytochemicals accumulation during sprouting under sub-optimal conditions. Thus, we investigated the effect of salinity during germination of an einkorn (TMoM), an emmer (TDiZ) and a durum wheat (TDuC) genotype on the total polyphenols (TPC), free- and bound-phenolic acids [PAs; i.e. caffeic acid, syringic acid, Pcoumaric acid, trans-ferulic acid, and salicylic acid] contents and antiradical activity (Trolox equivalent antioxidant capacity; TEAC) of sprouts and wheatgrass. The following NaCl treatments were applied: 0 (control), 25, 50 and 100 mM NaCl concentration throughout the whole experiment, or 50 and 100 mM NaCl until sprout stage and then 0 mM until wheatgrass stage (recovery treatments). TMoM showed higher total bound-PAs both in sprouts and wheatgrass with respect to the other Triticum genotypes (+25% and 24%, respectively) as well as of total bound-PAs and bound-SA in the recovery treatments. Moderate salt stress significantly increased all the investigated variables in TDiZ. Salt stress induced higher TPC and TEAC as well as total free-PAs values till 50 mM NaCl in TDuC, whilst significantly lowered total bound-PAs due to the negative variation of both P-CA (-84%) and trans-FA (-81%) acids. Results indicate that salinity during germination could be efficiently modulated to improve the nutritional quality of sprouts, wheatgrass and cereal-based products.

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How to Cite

Stagnari, F., Galieni, A., D’Egidio, S., Falcinelli, B., Pagnani, G., Pace, R., Pisante, M., & Benincasa, P. (2017). Effects of sprouting and salt stress on polyphenol composition and antiradical activity of einkorn, emmer and durum wheat. Italian Journal of Agronomy, 12(4). https://doi.org/10.4081/ija.2017.848

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