microscopic image of thele cress ovules (IMAGE) Nagoya University Caption Discovery of key genetic sequence essential for plant reproduction Credit Ryushiro Kasahara and Gary Drews Usage Restrictions This image may be used with appropriate credit. 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.