PROBLEM TO BE SOLVED: To use a chemical product contained in bamboo plants existing in abundance for a novel use.SOLUTION: A plant growth regulator contains a crude extract obtained by extraction of one of a leaf, a root, a bark, a branch and a major axis of bamboo plants such as Phyllostachysheterocycla f. pubescens with an organic solvent and a purified product of the extract, for example β-sitosterol-3-O-β-glucoside (1) as an active ingredient and has growth promotion activity or growth inhibition activity on lower hypocotyls and a radicles of seed plants respectively.COPYRIGHT: (C)2014,JPO&INPIT【課題】豊富に存在するタケ類植物に含まれる化学物質の新規用途への利用を図る。【解決手段】モウソウチク(Phyllostachysheterocycla f. pubescens)等のタケ類植物の葉、根、皮、枝および主軸のいずれかを有機溶媒で抽出して得られる粗抽出物または該抽出物の精製物、例えばβ -シトステロール -3 -O -β -グルコシド(1)を有効成分として含み、種子植物の下胚軸および幼根のそれぞれに対し、成長促進活性または生長阻害活性を有する植物生長調節剤。【選択図】図1
