1. National Agricultural Research Center for Kyushu Okinawa Region, Nishigoshi, Kumamoto 861-1192, Japan (T.M.); Forestry and Forest Products Research Institute, Tsukuba, Ibaraki 305-8687, Japan (T.I.); National Science Museum, Tsukuba, Ibaraki 305-0005, Japan (S.M., M.H.); and Complex Carbohydrate Research Center, The University of Georgia, 315 Riverbend Road, Athens, Georgia 30602 (A.D., P.A., M.A