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Effect of mercury on absolute root sap flow rate (A), and specific root sap flow rates expressed on a root xylem area (B) or root weight (C) basis, along with xylem (D) and phloem (E) area and stomatal conductance (F) of SGE (open bars) and SGECdt (filled bars) pea genotypes. Different letters show significant differences between treatments (LSD test; P<0.05). Means of two experiments with at least five determinations.
