1. Research Institute for Integrated Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan
2. Department of Biological Sciences, Faculty of Science, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan
3. Department of Microbiology, Southern Illinois University, Carbondale, Illinois 62901, United States
4. Department of Agrobioscience, Graduate School of Agriculture, Kobe University, Nada, Kobe 657-8501, Japan
5. Faculty of Science, Ibaraki University, Bunkyo, Mito 310-8512, Japan