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Surface area of root orders 1–4 under fresh water (Ctrl, open bars) and salinity (Salt, filled bars) in a standardized root branch of 1 g d.wt. Different lower/upper case letters denote significant differences between root orders within control and saline treatments respectively; Asterisks denote significant differences between treatments (mean ±SE; Mann–Whitney U-test, P < 0.05, n=189–214).
