Chemical composition of the solution cultures used in the different sets and the measured Cr toxicity threshold at 50% inhibition expressed by total concentration of Cr(III) <i>(</i>EC50[Cr_T]), free Cr activity (EC50{Cr³⁺}) and CrOH²⁺ activity (EC50{CrOH²⁺}) for barely root elongation with 95% confidence intervals.

<p>Chemical composition of the solution cultures used in the different sets and the measured Cr toxicity threshold at 50% inhibition expressed by total concentration of Cr(III) <i>(</i>EC50[Cr_T]), free Cr activity (EC50{Cr³⁺}) and CrOH²⁺ activity (EC50{CrOH²⁺}) for barely root elongation with 95% confidence intervals.