Poplar Movie (VIDEO) Penn State This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption This is a video of researchers describing their work on transgenic poplar trees to reduce lignin problems. Credit Amitabh Avasthi, Penn State Usage Restrictions Not for advertising use. 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.