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Table 2 The activities of CAT enzyme in non-transgenic (NT) and transgenic (SC) potatoes during and after stress

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

PEG treatments

Potato type

CAT activity (units / mg protein)

Stress period

Recovery period

DAY 0

DAY 1

DAY 2

DAY 3

DAY 4

DAY5

Control (0% PEG)

SC

0.463±0.22

0.472±0.16

0.459±0.19

0.466±0.24

0.461±0.26

0.457±0.22

NT

0.465±0.20

0.469±0.17

0.463±0.23

0.454±0.19

0.456±0.18

0.465±0.11

Moderate stress (10% PEG)

SC

0.451±0.14

0.814±0.17

0.854±0.26

0.722*±0.23

0.907*±0.29

1.214*±0.42

NT

0.47±0.15

0.717±0.53

0.653±0.35

0.533±0.24

0.565±0.22

0.896±0.36

Severe stress (20% PEG)

SC

0.459±0.17

0.667±0.26

0.839*±0.44

0.676*±0.23

0.734*±0.47

0.917*±0.29

NT

0.462±0.11

0.508±0.27

0.362±0.24

0.216±0.12

0.369±0.13

0.448±0.18

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