Defining Plant-Associated Metagenomes National Science Foundation (NSF) Collaboration with Dr. Phil Hugenholtz, DOE-JGI and Dr. Ruth Ley, Cornell   Pathogen virulence factors: Unique probes of plant cell structure and function Department of Energy (DOE) Collaboration with Dr. John Sondek, UNC-CH Dept. of Pharmacology   Reproductive Isolation and Autoimmunity in Plants Human Frontier Science Program (HFSP) Collaboration with Dr. Detlef Weigel, Dr. Jonathan Jones and Dr. Micheal Doebeli   Diversity and evolution of Pseudomonas syringae type III effectors National Institute of General Medical Sciences (NIGMS)   Programmed Cell Death in Plants National Institute of General Medical Sciences (NIGMS)   NSF Arabidopsis 2010 Program Mechanisms of NB-LRR disease resistance protein function