Pathogenic Bacteria Inside a Host Plant (IMAGE) Max Planck Institute for Plant Breeding Research Caption A colony of the bacterial pathogen Pseudomonas syringae (green) in an Arabidopsis thaliana leaf (magenta: plant structures called chloroplasts). Credit Tatsuya Nobori Usage Restrictions Only after permission from the corresponding author License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.