Young Thale Cress Seedling (IMAGE) University of Münster Caption Young thale cress seedling (Arabidopsis thaliana) with the fluorescent biosensor in its cells. The false colour image shows the redox status of the NAD pool in the cells and tissue. Rainbow scale from blue (oxidized NAD pool) to red (reduced NAD pool). Credit Plant Energy Biology Lab/Janina Steinbeck Usage Restrictions The image may only be used in context with this news release. 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.