Plant Results (IMAGE) DOE/Brookhaven National Laboratory Caption F-box proteins negatively control plant phenols' production. Compared to the normal growing plants (left panels), increasing the action of F-box proteins in plants results in lower levels of (poly)phenols in their seed coats (upper right, pale yellow seeds) and lower amounts of lignin in plant stem (middle right, weaker violet-red staining); whereas turning-down F-box action leads to more phenol pigments (purple) in basal stem and leaves (lower right). Credit Courtesy Brookhaven National Laboratory Usage Restrictions For use with stories about this research. 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.