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Primary root growth inhibition in Arabidopsis thaliana accessions exposed to 75 mM (A) and 150 mM (B) NaCl. The percentage of root growth inhibition was calculated by comparing the increase in primary root length of plants exposed to 5 days of salt treatment to the primary root length increase observed at the same time in plants grown under control conditions. Different letters indicate statistically different values among accessions according to ANOVA (p < 0.01).
