Microscopic Image of a Liverwort (IMAGE) University of Cambridge Caption Microscopic image of a liverwort where part of it has accumulated purple pigment (left). The pathogen can be detected as red fluorescence and it only sporulates in green tissues and does not accumulate well in purple tissues with activated defence (right). Credit Philip Carella 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.