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The relationships between shoot FW versus the Cs concentration in the agar ([Cs]agar) for Arabidopsis accession Ws2 grown for 21 d on mineral-replete agar containing Cs concentrations up to 10 mm and K concentrations of either 2 mm (•) or 20 mm (○). All data represent means ± se from at least eight replicate experiments. A logistic sigmoidal curve was fitted to the relationships between shoot FW versus [Cs]agar. The parameters for these equations are given in Table I.
