Phazolicin (IMAGE) Rutgers University Caption The bacterium that produces the antibiotic phazolicin forms nodules on bean plant roots, resulting in a more robust plant (right) than on the left. Credit Dmitrii Y. Travin 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.