Woody Structure of Aspen Stems (IMAGE) DOE/Brookhaven National Laboratory Caption Microscopic images of wood tissues from wild type (a) and transgenic (b) aspen trees show similar anatomical and structural features, suggesting that the transgenic plant maintains normal growth and wood formation even with altered lignin composition. Credit Brookhaven National Laboratory Usage Restrictions OK for use with stories about this research 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.