Relationship with Cyanobacteria (IMAGE) U.S. National Science Foundation Caption Every hornwort species is capable of a symbiotic relationship with cyanobacteria, making it a good plant to study to understand plant interactions with nitrogen-fixing microbes. Credit Fay-Wei Li 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.