CC0 Public Domain Researchers in the laboratory of Tessa Burch-Smith, Ph.D. at the Danforth Plant Science Center and the University of Tennessee, Knoxville, are conducting pioneering work to discover how plants transmit information, important molecules, and viruses between cells. Their research compared different methods to rigorously quantify callose accumulation around the microscopic PD channels and paves the way for a deeper understanding of how the plant immune system works.