Effect of Cultivar and Methanol Solvent Concentration on the Extraction of Bioactive Compounds from Colored Potatoes Grown in Lithuania

Nijolė Vaitkevičienė (), Jolita Višinskytė, Jūratė Staveckienė, Dovilė Levickienė and Jurgita Kulaitienė
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Nijolė Vaitkevičienė: Institute of Agriculture and Food Sciences, Agriculture Academy, Vytautas Magnus University, Donelaicio Str. 58, LT-44248 Kaunas, Lithuania
Jolita Višinskytė: Institute of Agriculture and Food Sciences, Agriculture Academy, Vytautas Magnus University, Donelaicio Str. 58, LT-44248 Kaunas, Lithuania
Jūratė Staveckienė: Bioeconomy Research Institute, Agriculture Academy, Vytautas Magnus University, Donelaičio Str. 52, LT-44248 Kaunas, Lithuania
Dovilė Levickienė: Institute of Agriculture and Food Sciences, Agriculture Academy, Vytautas Magnus University, Donelaicio Str. 58, LT-44248 Kaunas, Lithuania
Jurgita Kulaitienė: Institute of Agriculture and Food Sciences, Agriculture Academy, Vytautas Magnus University, Donelaicio Str. 58, LT-44248 Kaunas, Lithuania

Agriculture, 2025, vol. 15, issue 13, 1-12

Abstract: Potatoes are a valuable source of diverse bioactive compounds, including phenolics. In recent years, red- and purple-fleshed cultivars have garnered increasing scientific interest due to their higher content of phenolic compounds. The aim of this study was to evaluate the impact of 60%, 80%, and 100% methanol concentrations on the extraction of bioactive phenolic compounds from three red- and purple-fleshed potato cultivars. The qualitative and quantitative composition of phenolic compounds, the total anthocyanin content, as well as antioxidant activity in the prepared potato extracts were investigated. The results showed that the contents of the tested compounds and antioxidant activity in potato tuber methanolic extracts varied depending on the cultivar and methanol concentration. The potato extract obtained by 60% and 80% methanol showed the significantly highest contents of total phenolics (TPs) and total phenolic acids (TPAs). ‘Violet Queen’ extracts with 60% and 80% methanol had the significantly highest contents of TP, TPA, and caffeic acid. The significantly highest contents of p-coumaric acid were observed in ‘Mulberry Beauty’ extracts using 60% and 80% methanol. The significantly highest contents of epicatechin and quercetin were found in ‘Violet Queen’ extracts with 80% methanol, while the highest contents of myricetin, m-coumaric, and o-coumaric acids as well as the highest antioxidant activity were recorded in ‘Violet Queen’ extracts with 60% methanol.

Keywords: phenolic acid; total phenolics; methanol solvent; extraction; purple tuber flesh; rutin (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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