Figure 1.

The Arabidopsis CRT1a mutant displays reduced susceptibility to VL43 infection. (a) Disease symptom development of crt1a as compared to Col‐0 wild‐type plants infected with 1 × 10⁶ conidia/mL. Photographs were taken at 28 dpi. The scale bar equals 1 cm. (b) Leaf area analysis as measured at 35 dpi. (c) Fungal proliferation within infected Arabidopsis roots as measured by quantification of fungal DNA via qPCR at 28 dpi. (d) CRT1a is up‐regulated in response to Vl43 infection at 6 dpi in both in Arabidopsis thaliana (left) seedlings and Brassica napus (right) roots. (e) Typical calreticulin structure, according to Christensen et al., 2008. (f) Comparison of Arabidopsis and Brassica napus CRT1a sequence homology on CDS and amino acid level. Numbers indicate the % identity. Statistical significance was determined on the basis of three independent biological replicates by Student's t‐test and was evident for differences between wild‐type and the respective mutants (*P ≤ 0.05; **P ≤ 0.01).