Experiment results on photorespiration (IMAGE) Heinrich-Heine University Duesseldorf Caption Experiment results with various light scenarios (shafts of light) and different Arabidopsis variants in which the photorespiratory enzymes have been switched off. To the right of the plant images is a reduced schematic diagram of photorespiration, where the low growth of the GGT1 mutants in constant light is explained by a photorespiratory metabolic pathway in the chloroplast. Credit HHU/Thekla von Bismarck Usage Restrictions No restrictions. License Public Domain 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.