1. Resource & Environment Dept.,, International Production and Technology Center, Ajinomoto Co., Inc.,, 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa-ken, 210-8681, Japan
2. Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiyamachi, Aoba-ku,, Sendai-shi, Miyagi-ken, 981-8555, Japan