1. National Key Laboratory of Agriculture Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
2. Plant Pathology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
3. Department of Plant Pathology, University of Kentucky, 201F Plant Science Building, 1405 Veterans Drive, University of Kentucky, Lexington, KY 40546-0312, USA
4. Department of Plant Pathology, China Agricultural University, Beijing 100092, PR China