Effects of H2S and rhizobia on photosynthetic
parameters of soybean plants under water deficiency
As shown in Fig. 3A and 3D, Pn and Tr were obviously increased by Q8 and
Q8+NaHS treatments under the three water conditions. With the decrease
of water content, the Pn and Tr of four treatments had a slight downward
trend, especially for Q8 and Q8+NaHS treatments, they were significantly
decreased under SW condition compared with that the NW condition (Fig.
3A and 3D). With the decrease of water content, the Gs were
substantially reduced by Q8 and Q8+NaHS treatments. However, under the
same water condition, the Gs were markedly enhanced by Q8 and Q8+NaHS
(Fig. 3B). Under same water conditions, the apparent increase of the Ci
was observed by Q8 and Q8+NaHS treatments (Fig. 3C). Under same water
conditions, Ls was greatly reduced by Q8 and Q8+NaHS treatments compared
with that of the control, but no significant difference of the trend of
the four treatments was observed under different water conditions (Fig.
3E). In addition, the change trends of WUE were similar to Ls. The
difference was that the Q8 and Q8+NaHS treatments displayed a tendency
to increase initially and then decrease, but WUE was not markedly
changed by control plants (Fig. 3F).