1. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources and College of Life Science and Technology, 100 Daxue Road, Nanning, Guangxi 530004, China
2. National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, Guangxi, China
3. Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, U.S.A.