Advanced Plant Experiments (IMAGE) NASA/Johnson Space Center Caption NASA astronaut T.J. Creamer services the Advanced Plant Experiments-CSA2 study. It is expected that tree growth in microgravity will affect their growth rate, composition, tissue organization and gene expression. Credit NASA Usage Restrictions with credit to NASA 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.