1. Laboratory of Plant Nutrition and Fertilizer, Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan; Department of Domestic Science, Yamawaki Gakuen Junior College, Akasaka 4-10-36, Minato-ku, Tokyo 107-8371, Japan; Bioscience Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan; and School of Human Life and Environment Science, Ochanomizu University, Otsuka 2-1-1, Bunkyo-ku,...