PROBLEM TO BE SOLVED: To provide a plant stomata opening promoter, a plant stomata opening inhibitor, and a plant growth promoting method and a dry resistance improvement method using the plant stomata opening promoter and the plant stomata opening inhibitor.SOLUTION: A plant stomata opening regulator comprises, as an active ingredient, at least one selected from the group consisting of a compound represented by general formula (1), a compound represented by general formula (2), salt of theses compounds, and solvate of these compounds or salt thereof, or at least one selected from the group consisting of a compound represented by general formula (3), salt of the compound, and solvate of the compound or salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】植物気孔開口促進剤、及び植物気孔開口阻害剤、さらにはこれらを用いた植物成長促進方法、及び乾燥耐性向上方法を提供すること。【解決手段】一般式(1)で表される化合物、一般式(2)で表される化合物、これらの化合物の塩、並びにこれらの化合物若しくはその塩の溶媒和物からなる群より選択される少なくとも1種、又は一般式(3)で表される化合物、この化合物の塩、並びにこの化合物若しくはその塩の溶媒和物からなる群より選択される少なくとも1種を有効成分として含有する、植物気孔開口調節剤。【選択図】なし
