Table 2. PR activity in soluble protein extracts from immature leaves of WT peppermint plants and transgenic plants that overexpress (HMF) or cosuppress (LMF) mfs.

	Pulegone reductase activity, nmol·mg protein-1·h-1*
Plant line	Stressed plants†	Unstressed plants†
WT	1,133 ± 26	1,271 ± 110
LMF	3,406 ± 31	1,288 ± 13
HMF	433 ± 23	635 ± 26

^*Average rates ± SE are reported

^†Unstressed plants were grown under optimal conditions, and stressed plants were grown under reduced light and higher temperature