Table 2.

Sugar contents expressed in μmol hexose equivalent/g fresh weight of tubers of tubers of potato plants expressing 1-SST activity

Plant	Glucose	Sucrose	1-Kestose	1,1-Nystose	Starch
Wild type	3.16  ± 1.54	11.20  ± 2.47	—	—	651  ± 111
35S-SST 18	8.64  ± 2.22*	12.25  ± 2.30	29.87  ± 5.83	0.47  ± 0.22	665  ± 110
35S-SST 22	13.21  ± 2.46*	15.04  ± 4.17	25.01  ± 5.85	1.83  ± 0.76	608  ± 133
35S-SST 36	12.91  ± 1.90*	10.15  ± 1.82	10.79  ± 3.70	2.71  ± 1.14	596  ± 134

Tuber discs were homogenized in liquid nitrogen, sugars were extracted in 80% ethanol, and the amounts were quantified by HPAEC. Five replicates were analyzed per line. The data were analyzed for significant differences by using Student's t test; if P < 0.05 for the comparison of a transgenic line with the wild type, this is marked by *.