Arabidopsis thaliana HD-ZIPIII triple mutant (IMAGE) University of Pennsylvania Caption TheArabidopsis thaliana HD-ZIPIII triple mutant exhibits severe developmental defects, including stunted growth and malformed floral structures. Introducing a functional copy of the CORONA (CNA) gene restores the plant’s normal, wildtype appearance, but a version ofCNAlacking its START domain fails to do so. This highlights the essential role of the START domain inCNAtranscription factor function. (Image: Sarah Chourdury) Credit Sarah Chourdury Usage Restrictions Credit author when redistributed. 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.