Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan;
Faculty of Agriculture, Utsunomiya University, Utsunomiya, Japan;
Faculty of Environment and Information Sciences, Yokohama National University, Yokohama, Japan;
Research Institute for Integrated Science, Kanagawa University, Hiratsuka, Japan;
Allelopathy; Bioassay; Protoplast; Culture; Prunus; Species;