S. indica colonization of Arabidopsis dorn1-3 mutant and the parental Col-0aq lines quantified by qPCR at 3, 5, 7 and 10 dpi. The ratio of fungal (SiTEF) to plant (AtUBI) amplicons representing fungal colonization levels in plant root tissue was calculated using gDNA as template and the 2-ΔCT method. Error bars represent standard error of the mean of three technical replicates. The experiment was repeated 3 times for 3, 5 and 7 dpi with similar outcomes. 