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Fv/Fm (A), Wk (B), ETo/ABS (C) and ΔMR/MR0 (D) in the leaves of tetraploid (closed symbols) and diploid (open symbols) honeysuckle exposed to 0 (circles) and 300 mM (triangles) NaCl. Data in the figure indicate the mean of five replicates (±SD).
