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Research article2013Peer reviewed

Glycoalkaloid and calystegine levels in table potato cultivars subjected to wounding, light, and heat treatments

Petersson, Erik; Arif, Usman; Schulzova, Vera; Krtkova, Veronika; Hajslova, Jana; Meijer, Johan; Andersson, Hans Christer; Jonsson, Lisbeth; Sitbon, Folke

Abstract

Potato tubers naturally contain a number of defense substances, some of which are of major concern for food safety. Among these substances are the glycoalkaloids and calystegines. We have here analyzed levels of glycoalkaloids (α-chaconine and α-solanine) and calystegines (A3, B2, and B4) in potato tubers subjected to mechanical wounding, light exposure or elevated temperature; stress treatments that are known or anticipated to induce glycoalkaloid levels. Basal glycoalkaloid levels in tubers varied between potato cultivars. Wounding and light exposure, but not heat, increased tuber glycoalkaloid levels, and the relative response differed among the cultivars. Also calystegine levels varied between cultivars, calystegine B4 showing the most marked variation. However, the total calystegine level was not affected by wounding or light exposure. The results demonstrate a strong variation among potato cultivars with regard to post-harvest glycoalkaloid increases, and suggest that the biosynthesis of glycoalkaloids and calystegines occurs independently of each other.

Keywords

potato (Solanum tuberosum group Tuberosum), alkaloid metabolism, chaconine, food safety, solanine, plant stress response

Published in

Journal of Agricultural and Food Chemistry
2013, volume: 61, number: 24, pages: 5893-5902
Publisher: American Chemical Society

SLU Authors

Global goals (SDG)

SDG2 Zero hunger

UKÄ Subject classification

Genetics and Breeding
Food Science
Agricultural Science

Publication identifier

  • DOI: https://doi.org/10.1021/jf400318p

Permanent link to this page (URI)

https://res.slu.se/id/publ/42587