Plant root long (IMAGE) Salk Institute Caption Plant root (gray) showing IMA1 expression (yellow) during iron deficiency (left) and iron deficiency plus simulated bacterial presence (right). Credit Salk Institute Usage Restrictions With credit and related coverage License Original 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.