Table II. Effect of down-regulation of psPPase activity on soluble sugar and starch levels of N. benthamiana leaves of TRV2 control and TRV2-psPPase-silenced plants under well-watered and drought-induced conditions.

Values are presented as means ± se of five individual plants, and values determined to be significantly different (P < 0.05) from the respective TRV2 control using Student’s t test are shown in boldface.

Metabolite	TRV2 Watered	psPPase Watered	TRV2 Drought Stressed	psPPase Drought Stressed
	μmol g-1 fresh wt
Starch	5.5 ± 1.0	3.0 ± 0.1	7.5 ± 1.0	3.0 ± 1.0
Glc	0.4 ± 0.1	0.5 ± 0.1	0.6 ± 0.2	0.4 ± 0.1
Fru	0.8 ± 0.1	1.1 ± 0.2	1.1 ± 0.1	0.7 ± 0.1
Suc	0.9 ± 0.1	0.8 ± 0.1	0.9 ± 0.1	0.8 ± 0.1