Table 3. Pulegone reductase activity in soluble protein extracts from immature leaves of WT peppermint shoots fed with water alone (Control) or water containing saturating concentrations of menthone (MN) or menthofuran (MF).

Treatment	PR activity, nmol·mg protein-1·h-1*
Control	3,323 ± 178
MN	3,859 ± 126†
MF	2,446 ± 44‡

^*Average rates ± SE are reported

^†Not significantly different (P > 0.06) from control

^‡Significantly different (P < 0.05) from control