PROBLEM TO BE SOLVED: To provide a plant growth-regulating agent, a plant growth-regulating agent composition, and a plant growth-regulating method comprising applying them to roots, stems, leaf surfaces or fruits of a plant in a solution state or a solid state by means of leaf surface-spraying, immersion of lopped branche base in a solution, soil irrigation or the like.SOLUTION: The plant growth-regulating agent comprises a rare saccharide as an effective ingredient. The rare saccharide is an aldose or a ketose. The plant growth-regulating method comprises utilizing the plant growth-regulating actions of the rare saccharide. The rare saccharide is selected from the group consisting of D-psicose, a mixture of D-psicose and D-fructose, D-allose, and L-galactose.COPYRIGHT: (C)2006,JPO&NCIPI【課題】 植物生長調節剤、植物生長調節方法の提供。【解決手段】 希少糖を有効成分とする植物生長調節剤。前記希少糖はアルドースまたはケトースである。希少糖の植物の生長を調節する作用を用いる植物生長調節方法。前記希少糖はD-プシコース、D-プシコースとD-フラクトースの混合物、D-アロースおよびL-ガラクトースからなる群から選ばれる。【選択図】 図1
