At the early stage of the experiment, Fv/Fm showed little variation with increasing external Cu (ANOVA, Tukey test, p > 0.05), with dawn values persisting at around 0.85 (Fig. 4A).
At the early stage of the experiment,Fv/Fm showed little variation with increasing external Cu(ANOVA, Tukey test, p > 0.05), with dawn values persisting ataround 0.85 (Fig. 4A).