How Pyrabactin Works (IMAGE) University of California - Riverside Caption Each plant receptor is equipped with a pocket, akin to a padlock, in which a chemical, like pyrabactin (a synthetic chemical that helps plants cope with drought conditions), can dock into, operating like a key. Each receptor is equipped also with a lid that operates like a gate. For the receptor to be activated, the lid must remain closed. In a receptor where the gate closes, pyrabactin fits in snugly to allow the gate to close. In a receptor not activated by pyrabactin, the chemical binds in a way that prevents the gate from closing and activating the receptor. Credit Cutler lab, UC Riverside. Usage Restrictions None 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.