Research article - Peer-reviewed, 2009
Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus
Love, Jonathan; Bjorklund, Simon; Vahala, Jorma; Hertzberg, Magnus; Kangasjarvi, Jaakko; Sundberg, BjornAbstract
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.Keywords
plant hormones; secondary xylem; tension wood; vascular cambium; wood developmentPublished in
Proceedings of the National Academy of Sciences2009, volume: 106, number: 14, pages: 5984-5989
Authors' information
Love, Jonathan
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Björklund, Simon
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Vahala, Jorma
University of Helsinki
Hertzberg, Magnus
Kangasjärvi, Jaakko
University of Helsinki
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
UKÄ Subject classification
Forest Science
Publication Identifiers
DOI: https://doi.org/10.1073/pnas.0811660106
URI (permanent link to this page)
https://res.slu.se/id/publ/28551