Stem-cell differerientiation researcher (IMAGE) Purdue University Caption Yun Zhou is an associate professor of botany and plant pathology at Purdue University. His collaborative research uncovers a new mechanism that regulates stem cell differentiation in vascular plants. Credit Purdue Agricultural Communications/Joshua Clark Usage Restrictions News organizations may use this image in reports about the work of Purdue University’s Yun Zhou and his collaborators. License Original 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.