To provide: a function control agent for a plant potassium ion transporter by screening diphenylurea compound derivatives having function control activity targeting a transporter of a plant； and a method of growing a plant body modified by applying the plant potassium ion transporter function control agent to the plant.SOLUTION: The invention relates to a function control agent for a plant potassium ion transporter comprising a compound derivative (NS5806 family) represented by general formula (1) in the figure (symbols in the formula are as described in the specification). The invention also relates to a method of growing a plant by applying the function control agent to the plant.SELECTED DRAWING: None【課題】植物の輸送体を標的にした機能制御活性を有するジフェニル尿素化合物誘導体をスクリーニングし植物のカリウムイオン輸送体の機能制御剤を提供し、当該植物のカリウムイオン輸送体の機能制御剤を植物に施用する改質された植物体の育成方法を提供する。【解決手段】下記一般式（１）（式中の記号は明細書に記載の通り。）で示される化合物誘導体（ＮＳ５８０６類）を含む植物のカリウムイオン輸送体の機能制御剤、及び前記機能制御剤を植物に施用する植物の育成方法。【選択図】なし
