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Glycoalkaloid and Calystegine Levels in Table Potato Cultivars Subjected to Wounding, Light, and Heat Treatments
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2013 (English)In: Journal of Agricultural and Food Chemistry, ISSN 0021-8561, E-ISSN 1520-5118, Vol. 61, no 24, 5893-5902 p.Article in journal (Refereed) Published
Abstract [en]

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 (alpha-chaconine and a-solanine) and calystegines (A(3), B-2, and B-4) 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, with calystegine B-4 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 postharvest glycoalkaloid increases, and they suggest that the biosynthesis of glycoalkaloids and calystegines occurs independently of each other.

Place, publisher, year, edition, pages
2013. Vol. 61, no 24, 5893-5902 p.
Keyword [en]
potato (Solanum tuberosum group Tuberosum), alkaloid metabolism, chaconine, food safety, solanine, plant stress response
National Category
Agricultural Science Chemical Sciences Food Science
URN: urn:nbn:se:su:diva-92926DOI: 10.1021/jf400318pISI: 000320898600034OAI: diva2:644322


Available from: 2013-08-30 Created: 2013-08-26 Last updated: 2013-08-30Bibliographically approved

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Jonsson, Lisbeth
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Department of Ecology, Environment and Plant Sciences
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