Figure 1.

Variation in root parameters explained by genotype and environmental conditions obtained through global ANOVA. Independently analyzed individual root parameters, as per Table I, are given on the x axis. Twenty-six Arabidopsis natural accessions (genotype), as per Supplemental Table S1, were grown on control and low-K media (environment), and root architecture parameters were quantified for 480 plants phenotyped 12 DAG (n = 7–12 per genotype per condition). ANOVA was computed using type III sums of squares at a significance level of P < 0.05. n. exp., Not explained; gen*env, genotype-environment interaction.