highly significantP < 0.001
While taf1‐3 mutants do not display hypersensitivity to abiotic stresses including salt and osmotic stresses (Figure S1d), root growth of homozygous mutants was hypersensitive to X‐ray exposure, with highly significant interaction between genotype and treatment ( P < 0.001, two‐way factorial anova , Figure 6 c).