Effect of Phragmites' Toxin (IMAGE) University of Delaware Caption This image shows the tubulin, a structural protein, in the root of an Arabidopsis plant after exposure to Phragmites' toxin in the lab. In 20 minutes, the tubulin is completely gone. Credit Harsh Bais/University of Delaware Usage Restrictions Photo must include credit to University of Delaware. 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.