A great deal of effort is being invested in understanding the molecular mechanisms through which plants interact with pathogenic microbes. In Plant Immunity: Methods and Protocols, expert researchers in the field describe emerging technologies that can be applied to the most significant outstanding questions faced by scientists studying immunity in plants. The technologies in this detailed volume include methods for examining protein localization, protein complex purification, protein-protein interactions, transient and inducible gene expression, chromatin immunoprecipitation, microaspiration, laser microdissection, purification of fungal haustoria, and genetic manipulation of bacterial and oomycete pathogens. These techniques are applicable to a wide range of topics, including molecular functionality of NB-LRR proteins and other immune signaling components, and functional characterization of effector proteins and other pathogen components that sabotage host immunity. Written in the highly successful Methods in Molecular Biologyβ’ series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and key tips on troubleshooting and avoiding known pitfalls.