赤霉素和吲哚乙酸在乙烯促进脱落中竞争。

Gibberellic acid and indole acetic acid compete in ethylene promoted abscission.

机构信息

Departmen of Plant Sciences, Texas A&M University, 77843, College Station, Texas, USA.

出版信息

Planta. 1976 Jan;129(3):275-6. doi: 10.1007/BF00398272.

Abstract

Abscission of cotton cotyledonary explant petioles is promoted by gibberellic acid (GA) in room air and, to a lesser extent, in 1 μl ethylene liter(-1) air. GA3 consistently reduced the abscission-retarding effect of indole-acetic acid (IAA) (promoted abscission in the presence of IAA), and exogenous ethylene further promoted abscission. It is proposed that GA's promotion of ethylene-induced abscission is achieved by reducing the abscission retarding action of auxin.

摘要

棉花子叶外植体叶柄的离断脱落由赤霉素（GA）在室内空气中促进，在 1 μl 乙烯升(-1)空气中促进的程度较小。GA3 一致降低了吲哚乙酸（IAA）的离断抑制作用（在存在 IAA 的情况下促进离断），并且外源乙烯进一步促进了离断。据推测，GA 通过降低生长素的离断抑制作用来促进乙烯诱导的离断。