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Search: onr:"swepub:oai:lup.lub.lu.se:a3db15b2-c2d9-48d3-b673-900c040efbb2" > Metabolomic and tra...

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  • Merino, IreneSveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Institutionen för växtbiologi,Department of Plant Biology (author)

Metabolomic and transcriptomic analyses identify external conditions and key genes underlying high levels of toxic glycoalkaloids in tubers of stress-sensitive potato cultivars

  • Article/chapterEnglish2023

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  • 2023

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  • LIBRIS-ID:oai:lup.lub.lu.se:a3db15b2-c2d9-48d3-b673-900c040efbb2
  • https://lup.lub.lu.se/record/a3db15b2-c2d9-48d3-b673-900c040efbb2URI
  • https://doi.org/10.3389/fpls.2023.1210850DOI
  • https://res.slu.se/id/publ/126804URI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

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  • Introduction: High levels of toxic steroidal glycoalkaloids (SGAs) in potato tubers constitute a recognized food quality problem. Tuber SGA levels vary between potato cultivars and can increase after post-harvest stresses such as wounding and light exposure. A few cultivars, e.g., ‘Magnum Bonum’ and ‘Lenape,’ have been withdrawn from commercial sales due to excessive SGA levels during some cultivation years. However, these sudden SGA increases are diffucult to predict, and their causes are not understood. To identify external and genetic factors that underlie sudden SGA increases in certain potato cultivars, we have here in a 2-year study investigated ‘Magnum Bonum’ and five additional table potato cultivars for their SGA levels after wounding and light exposure. Results and methods: Results showed that ‘Magnum Bonum’ has an unusual strong SGA response to light exposure, but not to wounding, whereas ‘Bintje’ displayed an opposite regulation. Levels of calystegine alkaloids were not significantly altered by treatments, implicating independent metabolic regulation of SGA and calystegine levels also under conditions of high SGA accumulation. Metabolomic and transcriptomic analyses identified a small number of key genes whose expression correlated with SGA differences between cultivars. Overexpression of two key genes in transgenic low-SGA potato cultivars increased their leaf SGA levels significantly. Discussion: The results show that a strong response to light can underlie the SGA peaks that occasionally occur in certain potato cultivars and indicate that a between-cultivar variation in the expression of single SGA key genes can account for cultivar SGA differerences. We propose that current attempts to mitigate the SGA hazard will benefit from an increased consideration of cultivar-dependent SGA responses to post-harvest conditions, particularly light exposure. The identified key SGA genes can now be used as a molecular tool in this work.

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  • Guasca, Alexandra OlarteSveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Institutionen för växtbiologi,Department of Plant Biology (author)
  • Krmela, AlesUniversity of Chemistry and Technology, Prague (author)
  • Arif, UsmanSveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,University of the Punjab,National Food Agency,Goa University,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)49028 (author)
  • Ali, AshfaqLund University,Lunds universitet,Institutionen för immunteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Immunotechnology,Departments at LTH,Faculty of Engineering, LTH,National Bioinformatics Infrastructure Sweden (NBIS), SciLifeLab(Swepub:lu)cob-aaf (author)
  • Westerberg, ErikSwedish University of Agricultural Sciences,University of the Punjab,National Food Agency,Goa University (author)
  • Jalmi, Siddhi KashinanthSveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,National Food Agency,University of the Punjab,Goa University,Institutionen för växtbiologi,Department of Plant Biology (author)
  • Hajslova, JanaUniversity of Chemistry and Technology, Prague (author)
  • Schulzova, VeraUniversity of Chemistry and Technology, Prague (author)
  • Sitbon, FolkeSveriges lantbruksuniversitet,Swedish University of Agricultural Sciences,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)49785 (author)
  • Petersson, ErikSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för växtbiologi,Department of Plant Biology(Swepub:slu)49740 (author)
  • Swedish University of Agricultural SciencesInstitutionen för växtbiologi (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Frontiers in Plant Science141664-462X

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