Bradyrhizobium (image) University of California - Riverside Share Print E-Mail Caption Bradyrhizobium, seen here, form tumor-like nodules on the roots of plants. Credit Sachs lab, UC Riverside. Usage Restrictions None Share Print E-Mail 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.