Science Image (IMAGE) Salk Institute Caption The GSNOR gene is required for high iron tolerance throughout plants. Iron toxicity leads to impaired leaf and root growth. Plants (Arabidopsis thaliana) with the functional gene (left three seedlings) grow better in the condition with high iron levels than plants without the functioning GSNOR gene (right three seedlings). Credit Salk Institute Usage Restrictions with credit and related coverage. 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.