An indole derivative represented by the formula: ##STR1## (wherein each of X.sub.1, X.sub.2 and X.sub.3 is a hydrogen or chlorine atom; X.sub.2 is a chlorine atom and X.sub.3 a hydrogen atom in the case where X.sub.1 is a hydrogen atom; X.sub.2 is a hydrogen atom and X.sub.3 a chlorine atom or a hydrogen atom in the case where X.sub.1 is a chlorine atom; and R.sub.1 is a hydrogen atom, an alkali metal atom, or a lower alkyl group), a plant growth regulator containing said compound as active ingredient, and a method for regulating plant growth which comprises applying said regulator.
一种以以下结构式表示的
吲哚衍
生物:##STR1##(其中X.sub.1、X.sub.2和X.sub.3中的每一个是氢原子或
氯原子;在X.sub.1为氢原子时,X.sub.2为
氯原子,X.sub.3为氢原子;在X.sub.1为
氯原子时,X.sub.2为氢原子,X.sub.3为
氯原子或氢原子;R.sub.1为氢原子、碱
金属原子或较低的烷基基团),一种以该化合物为活性成分的
植物生长调节剂,以及一种调节植物生长的方法,包括应用该调节剂。