Quantitation of Toxic Steroidal Glycoalkaloids and Newly Identified Saponins in Post-Harvest Light-Stressed Potato (Solanum tuberosum L.) Varieties

Sebastian Baur, Nicole Bellé, Hans Hausladen, Sebastian Wurzer, Laura Brehm, Timo D. Stark, Ralph Hücklhoven, Thomas Hofmann, Corinna Dawid

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Although domesticated potatoes contain a large variety of steroidal glycoalkaloids (SGAs) and saponins, in the past, many research projects mainly focused on the two major SGAs, α-solanine and α-chaconine. This study investigates the quantitative changes, induced by post-harvest LED light exposure, of six SGAs and four saponins in 12 potato cultivars at three different time points (1, 7, and 16 days), by using ultra-performance liquid chromatography tandem mass spectrometry. Altogether, SGA contents of 3.0-17.1 mg/100 g fresh weight (FW) could be observed in the analyzed tubers with potato varieties highly exceeding the newly discussed safety limit of 10 mg/100 g. The overall contents of 0.1-5.4 mg/100 g FW of the so far barely studied saponins, like protoneodioscin or barogenin-solatrioside, highly differed between the assayed potato cultivars. Furthermore, cultivar-specific regulations of SGAs and saponins could be observed due to light exposure.

Original languageEnglish
Pages (from-to)8300-8308
Number of pages9
JournalJournal of agricultural and food chemistry
Volume70
Issue number27
DOIs
StatePublished - 13 Jul 2022

Keywords

  • LC-MS/MS
  • abiotic stress
  • potato
  • saponin
  • steroidal glycoalkaloid
  • α-chaconine
  • α-solanine

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