Ae. Desjardins et al., DIVERSITY OF SESQUITERPENES IN 46 POTATO CULTIVARS AND BREEDING SELECTIONS, Journal of agricultural and food chemistry, 43(8), 1995, pp. 2267-2272
Rishitin, lubimin, and solavetivone were the major sesquiterpenes foun
d 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 mu g/g of fresh we
ight 4 days after treatment with the elicitor arachidonic acid. Seven
genotypes produced significantly (P < 0.01) higher sesquiterpene conce
ntrations than Russet Burbank (17 mu g/g), a widely grown commercial c
ultivar. More than half of the genotypes tested were significantly (P
< 0.01) different from Russet Burbank in sesquiterpene composition due
to higher ratios of lubimin or solavetivone, both of which are report
ed to be biosynthetic precursors of rishitin. The highest ratios of so
lavetivone to total sesquiterpenes were strongly correlated with deriv
ation from S. tuberosum ssp. andigena CPC 1673, which confers the H1 g
ene for resistance to the golden nematode (Globodera rostochiensis).