Pb+Se treatment (mM) GSH (μmol/g fw) GSSG (μmol/g fw) GSH+GSSG (μmol/g fw) GSH/GSSG
PbSe0 2.19 ± 0.43c 1.58 ± 0.02a 3.77c 1.39d
PbSe0.1 4.51 ± 0.70b 1.29 ± 0.07a 5.80c 3.50c
PbSe0.5 5.13 ± 0.76b 1.08 ± 0.03b 6.21b 4.75c
PbSe1.0 7.04 ± 0.58a 0.93 ± 0.02b 7.97b 7.57b
PbSe2.5 9.10 ± 0.72a 0.81 ± 0.05b 9.91a 11.23a
PbSe5.0 8.65 ± 0.24a 0.97 ± 0.01b 9.62a 8.92b
aValues refer to the mean followed by standard deviation. Means followed by the same letter in a column were not significantly different at P<0.05
Table 2: Influence of Se on levels of reduced and oxidized glutathione, and the ratios of reduced and oxidized glutathione in coleus roots exposed to Pb stress.