Effects of H2S and rhizobia on Chlorophyll
fluorescence parameters of soybean plant under water deficiency
With the decrease of water content, ETR and PSII displayed a tendency to
increase initially and then decrease by control plants. By Q8 treatment,
ETR and PSII were straight down with the decrease of water content.
However, ETR and PSII were reduced by NaHS and Q8+NaHS treatments under
MW condition (Fig. 4A and B). Among the three water conditions, the NPQ
was increased in different degrees by Q8 and Q8+NaHS treatments, and the
NPQ of control treatment increased with the decrease of water content,
but the NPQ did not greatly affect under other treatments (Fig. 4C).
Among the three water conditions, Fv/Fm was conspicuously increased by
Q8 and Q8+NaHS treatments in soybean leaves. With the decrease of water
content, the Q8 and Q8+NaHS treatments partially rescued the decrease of
Fv/Fm in soybean leaves (Fig. 4D).