Chitin‐induced callose deposition in the mapkkk5 mutants

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Presentation transcript:

The Arabidopsis CERK1‐associated kinase PBL27 connects chitin perception to MAPK activation Chitin‐induced callose deposition in the mapkkk5 mutants. Seedlings were analyzed at 18 h after treatment with 10 μM chitin. Representative pictures from the biological replicates are presented. Data are means ± SD from three independent biological replicates, where each biological replicate consists of two technical replicates. The asterisks indicate statistically significant differences from the WT controls by Student's t‐test (P < 0.05). Leaf disks were treated with 10 μM (GlcNAc)7 in a solution containing 500 μM L‐012 and 10 μg/ml horseradish peroxidase. ROS production was quantified using a luminescence microplate reader. Data are means ± SD calculated using three biological replicates, where each biological replicate consisted of two technical replicates. mapkkk5 mutations reduce resistance to Alternaria brassiciicola. Lesion sizes were measured 6 days after inoculation. Values are mean ± SEM, n ≥ 92. Asterisks indicate significant difference from wild‐type controls by Student's t‐test (P < 0.01). Analysis of chitin‐induced transcriptional reprogramming in mapkkk5‐1. Total RNA was extracted from seedlings treated with mock or 40 μM chitin for 3 h and analyzed by RNA‐seq. Genes that are significantly induced or suppressed by chitin in the wild type were selected (q‐value < 0.05; 12,992 genes). The log2 fold changes in the selected genes compared with mock in the wild type and mapkkk5‐1 were plotted. Yellow and blue dots indicate genes that show reduced induction or suppression (506 genes) or enhanced induction or suppression (151 genes) in mapkkk5‐1 compared with the wild type, respectively. The slope of the linear regression line (red) indicates that the overall transcriptional response is weakened in mapkkk5‐1 compared with the wild type. As a comparison, the line y = x (black) is shown. For more details, see the . A heatmap showing MAPKKK5‐dependent genes. Genes showing reduced induction or suppression in mapkkk5‐1 compared with the wild type were selected as described in the (339 genes). The log2 fold changes in the selected genes compared with mock were subjected to hierarchical clustering analysis. Yellow indicates positive values, blue indicates negative values, and black indicates zero: see the color scale. Expression patterns of representative MAPKKK5‐dependent genes. qRT–PCR analysis of defense‐related genes in 8‐day‐old seedlings exposed to 40 μM (GlcNAc)7 for 3 h. Data are shown as the average of three independent biological replicates ± SD. The asterisks indicate statistically significant differences from the WT controls by Student's t‐test (P < 0.05). IF THIS IMAGE HAS BEEN PROVIDED BY OR IS OWNED BY A THIRD PARTY, AS INDICATED IN THE CAPTION LINE, THEN FURTHER PERMISSION MAY BE NEEDED BEFORE ANY FURTHER USE. PLEASE CONTACT WILEY'S PERMISSIONS DEPARTMENT ON PERMISSIONS@WILEY.COM OR USE THE RIGHTSLINK SERVICE BY CLICKING ON THE 'REQUEST PERMISSIONS' LINK ACCOMPANYING THIS ARTICLE. WILEY OR AUTHOR OWNED IMAGES MAY BE USED FOR NON-COMMERCIAL PURPOSES, SUBJECT TO PROPER CITATION OF THE ARTICLE, AUTHOR, AND PUBLISHER. EMBO J, Volume: 35, Issue: 22, Pages: 2468-2483, First published: 27 September 2016, DOI: (10.15252/embj.201694248)