Enhanced tolerance of transgenic potato plants expressing choline oxidase in chloroplasts against water stress

Botanical Studies

Table 1 The activities of SOD enzyme in non-transgenic (NT) and transgenic (SC) potatoes during and after stress

PEG treatments	Potato type	SOD activity (units / mg protein)
		Stress period				Recovery period
		DAY 0	DAY 1	DAY 2	DAY 3	DAY 4	DAY5
Control (0% PEG)	SC	16.86±2.05	18.55±3.22	17.1±2.65	17.88±1.85	18.65±1.96	17.3±2.88
Control (0% PEG)	NT	17.07±2.72	18.12±1.75	18.9±3.11	17.6±1.68	16.7±2.84	17.83±2.03
Moderate stress (10% PEG)	SC	18.2±2.21	25.82±4.55	30.15±6.48	23.84±5.14	31.44^*±4.97	37.28^*±7.13
Moderate stress (10% PEG)	NT	18.21±3.48	21.75±6.54	28.26±5.84	19.52±5.78	20.89±4.22	28.44±7.61
Severe stress (20% PEG)	SC	17.92±1.57	23.18±4.21	26.77^*±4.33	22.46^*±6.14	25.06^*±3.35	29.34±6.92
Severe stress (20% PEG)	NT	16.55±2.41	18.25±3.26	17.25±5.11	11.77±4.68	17.38±3.57	22.21±4.85

Data are expressed as the mean of five replicates. Asterisks (^*) represent significantly different (P < 0.05) with the NT.