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United States Department of Agriculture

Agricultural Research Service

Title: Diversity of Sesquiterpenes in Forty-Six Potato Cultivars and Breeding Selections

Authors
item McCormick, Susan
item Desjardins, Anne
item Corsini, Dennis

Submitted to: Phytochemical Society of North America Meeting and Newsletter
Publication Type: Abstract Only
Publication Acceptance Date: August 16, 1995
Publication Date: N/A

Technical Abstract: Rishitin, lubimin and solavetivone were the major sesquiterpenes found in 46 cultivars and breeding selections of potato (Solanum tuberosum L.). Concentrations of total sesquiterpenes were low or undetectable in untreated tuber slices, but ranged from 5 to 101 microgram/g fresh weight four days after treatment with the elicitor arachidonic acid. Seven genotypes produced significantly higher sesquiterpene concentrations than Russet Burbank (17 microgram/g), a widely grown commercial cultivar. More than half of the genotypes tested were significantly different from Russet Burbank in sesquiterpene composition due to higher ratios of lubimin or solavetivone, both of which are reported to be biosynthetic precursors of rishitin. The highest ratios of solavetivone to total sesquiterpenes were strongly correlated with derivation from S. tuberosum ssp. andigena CPC 1673 which confers the H1 gene for resistance to the golden nematode (Globodera rostochiensis).

Last Modified: 10/22/2014
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