Why Fruits Ripen and Flowers Die: Salk Scientists Discover How Key Plant Hormone is Triggered (image) Salk Institute Share Print E-Mail Caption Plants with reduced levels of ETP1 and ETP2 (plant on the right) are smaller than their normal counterparts (plant on the left), and have abnormal flowers with the pistil protruding from unopened floral buds. Credit IMAGE: Courtesy of Dr. Hong Qiao, Salk Institute for Biological Studies Usage Restrictions News media reproduction to illustrate this story permitted with proper attribution as provided above. For one time use only. Share Print E-Mail 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.