Changes of endogenous H2S, lipid membrane
peroxidation, hydrogen peroxide, and superoxide anion in leaves of
soybean plants under water deficiency
The endogenous H2S contents were reduced by NaHS, Q8 and
Q8+NaHS treatments condition under water deficiency (Fig. 5A). Under NW
and SW conditions, the endogenous H2S content of Q8+NaHS
treatment was higher than that of control, and the endogenous
H2S content was not markedly regulated by Q8 and Q8+NaHS
treatments under MW condition (Fig. 5A). With the decrease of water
content, the MDA content and OFR content were obviously increased by
four treatments (Fig. 5B and 5D). Under SW condition, membrane lipid
peroxidation was increased by 20.5% and 14.7% in Q8 and Q8+NaHS
treatments, respectively, compared with control (Fig. 5B). The OFR
content was reduced by Q8+NaHS treatment compared with the control under
SW condition (Fig. 5D). With the decreases of water content, the
H2O2 content was not obviously
influenced by control treatment. However, the
H2O2 content of NaHS, Q8 and Q8+NaHS
treatments displayed a tendency to increase initially and then reduce
with the decrease of water content. In addition, under three water
conditions, the H2O2 content of the
Q8+NaHS treatment was considerably lower than the control (Fig. 5C).