Lupin Model (IMAGE) Helmholtz Association Caption Pictured here are roots of the White Lupin in a model. With the help of X-ray tomograhy, UFZ researchers demonstrated a drought-related shrinkage of plant roots and as a result the formation of an air gap between the roots and the surrounding soil. Credit Source: Dr. Ulrich Weller/UFZ Usage Restrictions None 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.