The level of AtTIL accumulation influences oxidative stress tolerance of Arabidopsis. (a) Plants were grown under normal conditions for 3 weeks and then sprayed until run off with either water or a 15 μM paraquat solution. Pictures were captured at the indicated time after treatment. Only the paraquat-treated plants are shown since no effect was observed for plants sprayed with water. (b) A close-up is shown to better show the necrotic lesions. Results are representative of at least three independent assays involving 32 plants per line per assay.