Study Identifies Immune Receptor in Beans That Attracts Predators of Caterpillars

Scientists have long known that plants can emit volatile organic compounds to attract natural predators of herbivores like caterpillars. Recent research led by Adam Steinbrenner, a biologist at the University of Washington, has identified a specific immune receptor in common bean plants that plays a crucial role in this defense mechanism. The study, conducted in both laboratory and agricultural settings in Oaxaca, Mexico, reveals how plants detect caterpillar feeding through the introduction of saliva containing herbivore-associated molecular patterns (HAMPs). One such molecule, inceptin, and its fragment In11, are derived from the plant's own proteins and are released when caterpillars feed on the leaves.