Accumulation of nonpolar marker compounds as a function of chemical class and time point after tissue wounding. (A) Nonpolar markers of day-3 and day-7 potato periderm extracts; (B) a detailed view of the fatty acid potential marker class. The samples are coded for Atlantic (red, A), Chipeta (green, C), Norkotah Russet (blue, R), and Yukon Gold (gold, Y), using checkerboards for day-3 and solid colors for day-7 markers, respectively.