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Correlations between root hydraulic conductivity (Lpr–h) and aquaporins AtPIP1;5 (a) or AtPIP2;1 (b) expression levels in Col‐0 and a collection of seven Arabidopsis mutants with alterations in endodermal Casparian strips (CS) and/or suberin. Spearman’s correlations are statistically significant for each gene (P < 3 × 10–2 and 2 × 10–7, respectively). Plants were grown hydroponically for 19 to 21 d (means ± SE, n = 3).
