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The content of total ascorbate (AsA + DHAsA) (A), AsA, (B), DHAsA (C), and AsA/DHAsA ratio (D) in Medicago ciliaris leaves after 3 weeks of drought treatment. Values represent mean ± SE (n = 5) and the different letters a to d indicate significant differences between the treatments. Low soil water potential (WPl), high soil water potential (WPh), Biochar (Bc).
