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Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus.

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.

SUBMITTER: Love J

PROVIDER: S-EPMC2657089 | biostudies-literature | 2009 Apr

REPOSITORIES: biostudies-literature

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Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus.

Love Jonathan J Björklund Simon S Vahala Jorma J Hertzberg Magnus M Kangasjärvi Jaakko J Sundberg Björn B

Proceedings of the National Academy of Sciences of the United States of America 20090317 14

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 et ...[more]

PMID: 19293381

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