1. Department of Postharvest Science of Fresh Produce; Agricultural Research Organization, The Volcani Center; Bet Dagan 50250 Israel
2. Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment; The Hebrew University of Jerusalem; Rehovot 76100 Israel
3. Key Laboratory of Plant Resources; Institute of Botany, Chinese Academy of Sciences; Beijing 100093 China
4. Department of Plant Pathology; University of Wisconsin - Madison; Madison WI 53706-1598 USA
5. Department of Medical Microbiology and Immunology; University of Wisconsin - Madison; Madison WI 53706-1598 USA
6. Department of Bacteriology; University of Wisconsin - Madison; Madison WI 53706-1598 USA