Retterer Rhizosphere-on-a-chip (IMAGE) DOE/Oak Ridge National Laboratory Caption Scott Retterer examines microscopic images taken of the environment surrounding poplar tree roots using the rhizosphere-on-a-chip platform. Credit Carlos Jones, ORNL/U.S. Dept. of Energy Usage Restrictions Use photo credit License Original 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.