Figure 6.

Nicotine concentrations of pith from as-lox3 and ir-pmt plants are lower than those from wild-type plants. Values are relative concentrations of nicotine per gram fresh mass (FM) accumulated in the pith of wild-type (black bar), as-lox3 (dark-gray bar), and ir-pmt (light-gray bar) plants. Pith samples were taken from plants growing in a field plot in the Great Basin Desert in Southwestern Utah, which were infested by the natural occurring herbivores. Different letters indicate significant differences among genotypes (ANOVA; P < 0.01).