Ethylene is an Endogenous Stimulator of Cell Division in the Cambial Meristem of Populus

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2009 Mar 19

PMID 19293381

Citations 81

Authors

Jonathan Love

Simon Bjorklund

Jorma Vahala

Magnus Hertzberg

Jaakko Kangasjarvi

Bjorn Sundberg

Affiliations

Soon will be listed here.

Abstract

The plant hormone ethylene is an important signal in plant growth responses to environmental cues. In vegetative growth, ethylene is generally considered as a regulator of cell expansion, but a role in the control of meristem growth has also been suggested based on pharmacological experiments and ethylene-overproducing mutants. In this study, we used transgenic ethylene-insensitive and ethylene-overproducing hybrid aspen (Populus tremula x tremuloides) in combination with experiments using an ethylene perception inhibitor [1-methylcyclopropene (1-MCP)] to demonstrate that endogenous ethylene produced in response to leaning stimulates cell division in the cambial meristem. This ethylene-controlled growth gives rise to the eccentricity of Populus stems that is formed in association with tension wood.

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