Invasive Grass Experiment (IMAGE) Botanical Society of America Caption An experiment with invasive grass found that the biomass and rhizome production was severely stunted without bacteria. The larger, red-striped plant on the right had the bacteria and high rates of nitrogen fixation, whereas the plant on the left is smaller because bacteria were inhibited and was not fixing nitrogen. The tin foil wrapping protects the substrate from light. These were grown from sterilized seeds in a growth chamber at the University of Montana. Credit Courtesy of Marnie Rout, University of North Texas Health Science Center. Usage Restrictions Cite original publication and credit line. 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.