SXRF image (IMAGE) Dartmouth College Caption Synchrotron X-ray Fluorescence Spectrometry images of a normal leaf (top row) and a leaf from the ilr3-4 mutant which shows bleaching (bottom row). From left to right, the images show the full leaf followed by the distribution of potassium (blue), calcium (red), and iron (green). Bleaching in ilr3-4 leaves is accompanied by redistribution of ions, with a strong depletion in potassium but enrichment of calcium in bleached sectors compared to surrounding healthy tissue. Credit Image from PNAS produced by Nabila Riaz/Dartmouth College. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.