Iron Oxidizing Bacteria (IMAGE) American Society of Agronomy Caption Gradient tube showing growth of iron oxidizing bacteria derived from rice roots. Credit Gretchen Dykes Usage Restrictions For use with this story only. 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.