Figure 4.

Total Cys, γEC, and glutathione contents in shoots (white bars) and roots (black bars) of maize seedlings cultivated with different BSO concentrations in the presence of 5 μm each of the safeners CGA 154 281 and BAS 145 138 at 25°C for 4 d, then at 5°C for 7 d (5°C). Asterisk, Indicates an experiment in which the two herbicide safeners were added 1 d after BSO. Controls (25°C) were cultivated at 25°C during the whole experimental period. Mean values of six measurements from three independent experiments ± sd are presented. Values carrying different letters are significantly different at P ≤ 0.05.