Figure 1: Oxidizing bacteria (Pantoea sp.; arrows) within a root hair cell of a seedling of rapeseed (Brassica napus), showing bacterial cells in vesicles surrounded by red-staining H2O2 (arrows; stained with 3,3′-Diaminobenzidine/ horseradish peroxidase then counterstained with 0.1% aniline blue/lactic acid). Later stages of oxidation are indicated with white arrows.