Table 3.

Sugar and starch contents expressed in μmol hexose equivalent/g fresh weight of tubers of wild-type plants and plants harboring the 1-SST and the 1-FFT gene

Plant	Glucose	Fructose	Sucrose	Fructan	Starch
Desiree	2.12  ± 1.62	n.d.	9.11  ± 1.77	—	770  ± 113
22/19	3.87  ± 3.31	n.d.	14.67  ± 6.41	34.13  ± 4.71	631  ± 144
22/30	5.63  ± 4.24	n.d.	10.60  ± 5.21	33.00  ± 4.08	645  ± 132
22/34	7.21  ± 4.14*	n.d.	9.71  ± 2.17	37.43  ± 5.82	620  ± 75*

Whole tuber of five plants per line were homogenized and aliquots were analyzed. 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 *. n.d., not detectable.