Plant Leaves (IMAGE) University of California - Riverside Caption This image shows the differences between a pathogen-infected leaf (top) from a wild type plant (where the adaptive transposon insertion mechanism involving COPIA-R7 is intact) and two mutants (where this mechanism is compromised). The wild type plant remains healthy. The two mutants (middle and bottom) get sick and exhibit disease symptoms caused by the fungal pathogen. Credit Eulgem Lab, UC Riverside. Usage Restrictions None 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.