![The Discovery Files show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/014/590/small/the-discovery-files.jpg)
Summary: A team of researchers in Denmark, at the University of California, Davis, and at UC Berkeley have identified a group of plant proteins that "shut the door" on bacteria that would otherwise infect the plant's leaves. The findings provide a better understanding of plants' immune systems and will likely find application in better protecting crops and horticultural plants against diseases.