Figure 2.

Polyacetylene abundance and composition in aerial and subterranean tissues of Daucus carota. A, Absolute abundance of polyacetylenes in leaf, petiole, xylem, phloem, and epidermis given in micrograms per milligram of dry tissue. B, Relative abundance of polyacetylenes in leaf, petiole, xylem, phloem, and epidermis given as percent of total polyacetylenes. For both A and B, bar lengths and error bars represent the average and sd of six independent samples each from a different carrot plant.