Kaitlin Palla, Bredesen Center (IMAGE) DOE/Oak Ridge National Laboratory Caption Kaitlin Palla, University of Tennessee Bredesen Center for Interdisciplinary Research and Graduate Education student, studies agave plants in Oak Ridge National Laboratory's greenhouse as part of the lab's research into a water efficient mode of photosynthesis called crassulacean acid metabolism, or CAM. Credit Jason Richards/Oak Ridge National Laboratory 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.