Table 1 : Contents of low molecular mass compounds in young leaves (leaf number 3) of wild-type potato plants and GGaccumulating transgenic clones (Means ± confidence intervals, α=0.05). Statistical significant differences between transgenic and corresponding wild-type plants are shown in bold face. Samples were taken before the stress and 4 week after treatments with normal watering (control), with salt-enriched watering (salt stress), or with reduced watering (drought stress).

Plant µmol/g fresh mass
GG Sucrose Fructose Glucose Sum
                   Before stress

WT 0 2.19±1.26 9.06±1.68 7.31±1.18 18.56
Alba-AF1 12.87±2.42 1.11±0.73 6.36±1.07 5.94±1.43 26.28
Alba-AF8 11.91±2.25 0.94±0.50 5.66±0.90 5.14±1.18 23.65
Alba-AF9 10.96±2.03 1.17±0.81 6.18±0.94 5.43±1.08 23.74

                   4 weeks control

WT 0 1.39±0.24 6.99±1.11 5.15±0.70 13.53
Alba-AF1 0.22±0.20 2.97±1.09 8.43±2.31 6.77±1.25 18.39
Alba-AF8 0.14±0.13 1.60±0.48 5.48±1.29 4.50±0.75 11.72
Alba-AF9 0.27±0.21 1.89±0.63 5.82±1.38 4.79±0.93 12.77

                   4 weeks salt stress

WT 0 4.17±1.12 1.93±0.52 1.98±0.42 8.08
Alba-AF1 0.07±0.03 7.23±1.81 2.37±0.56 2.57±0.50 12.24
Alba-AF8 0.03±0.01 7.66±1.89 2.29±0.64 2.17±0.48 12.15
Alba-AF9 0.08±0.03 7.46±1.48 2.31±0.50 2.34±0.45 12.19

                   4 weeks drought stress

WT 0 2.28±0.73 8.80±1.78 6.48±1.35 17.56
Alba-AF1 0.08±0.04 3.21±0.29 9.97±1.53 8.32±0.97 21.58
Alba-AF8 0.04±0.02 3.26±0.90 9.99±3.65 8.03±3.32 21.32
Alba-AF9 0.07±0.03 2.93±0.55 8.05±1.11 6.43±0.93 17.48

                   Before stress

WT 0 1.23±0.51 2.67±0.81 2.94±0.83 6.84
Alba-rd29A-AF5 5.46±0.58 0.73±0.28 1.51±0.48 2.26±0.52 9.96
Alba-rd29A-AF9 5.24±0.28 0.63±0.36 1.99±0.64 2.69±0.57 10.55
Alba-rd29A-AF16 4.03±0.24 0.54±0.30 1.83±0.56 2.45±0.41 8.85

                   4 weeks control

WT 0 2.96±0.57 1.95±0.35 2.18±0.36 7.09
Alba-rd29A-AF5 4.73±0.74 2.21±0.78 2.02±0.40 2.79±0.36 11.75
Alba-rd29A-AF9 3.34±0.43 2.96±0.64 2.16±0.45 2.84±0.46 11.30
Alba-rd29A-AF16 4.03±1.36 1.67±0.85 4.67±1.37 5.71±1.47 16.08

                   4 weeks salt stress

WT 0 1.30±0.71 4.88±1.02 5.61±0.89 11.79
Alba-rd29A-AF5 7.52±1.17 0.83±0.67 3.35±0.44 5.45±0.42 17.15
Alba-rd29A-AF9 7.67±1.45 0.39±0.12 4.04±0.40 5.85±0.93 17.95
Alba-rd29A-AF16 9.26±1.51 0.71±0.43 4.99±0.89 6.74±0.97 21.70

Hagemann et al.Journal of Plant Science and Molecular Breeding  2013 2:1DOI : 10.7243/2050-2389-2-1