Researchers examine root growth experiment (IMAGE) Princeton University, Engineering School Caption Postdoctoral research associate Samuel Eastman (left), 2024 Princeton graduate Kaeli Ficco (right), and their colleagues uncovered a mechanism by which soil bacteria can modulate plant immunity. Credit Sameer A. Khan/Fotobuddy Usage Restrictions Noncommercial use only 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.