Complete ¹H and ¹³C NMR spectral assignments for the glycoalkaloid dehydrocommersonine

Abstract

The normal levels and types of glycoalkaloids found in commercial varieties of potato (Solanum tuberosum) appear to present no hazard to human health. However when wild Solanum species are used in breeding endeavors, new and untested glycoalkaloids may be introduced. Recent studies of domestic crosses with a wild Solanum oplocense accession indicated that the levels of a non-indigenous glycoalkaloid appeared associated with reduced defoliation by the Colorado potato beetle. The non-indigenous glycoalkaloid was isolated from foliage of the wild S. oplocense accession and unambiguously characterized by high-resolution electrospray ionization mass spectrometry and NM analysis as the glycoalkaloid dehydrocommersonine.

Comparative Metabolite Profiling ofSolanum tuberosumagainst Six WildSolanumSpecies with Colorado Potato Beetle Resistance

“…The remaining glycoalkloids in Table were all not detectable in S. tuberosum but were produced in wild species. Feature 7.56\1046.5571 was found in the largest number of wild species (four) and was assigned to the glycoalkaloid dehydrocommersonine, which had been previously characterized from S. oplocense . − The peak intensity for dehydrocommersonine was highest in S. oplocense and was the highest peak intensity of all the features in any species. High levels were also found in S. paucisectum , S. chomatophilum , and S. piurae .…”

NMR-Based Metabolomics for Organic Farming Traceability of Early Potatoes

“…Many foods have been characterized by HRMAS-NMR coupled with a multivariate analysis strategy . A similar metabolomics approach has also been widely used in potato (Solanum tuberosum L.): several glycoalkaloids, solanidine, acetylleptidine, diterpenoids, and starch were isolated, and the NMR signals were assigned. Studies of metabolic pathway modifications in genetically modified tubers have proposed adopting an integrated strategy. , …”