<i>E. coli</i> Revealed (IMAGE) Purdue University Caption Both images show plants grown in an agar substrate with a bioluminescent E. coli, which emits light when active. The E. coli associated with the roots are glowing (right) when viewed in the dark. Credit Photo provided by Bruce Applegate 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.