1. Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus
- Author
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Jonathan Love, Simon Björklund, Björn Sundberg, Jorma Vahala, Magnus Hertzberg, and Jaakko Kangasjärvi
- Subjects
Cyclopropanes ,Multidisciplinary ,Ethylene ,Cell division ,fungi ,Meristem ,Meristem growth ,food and beverages ,Endogeny ,Biology ,Biological Sciences ,Ethylenes ,biology.organism_classification ,Plants, Genetically Modified ,Cell biology ,chemistry.chemical_compound ,Populus ,chemistry ,Botany ,Vascular cambium ,Plant hormone ,Cambium ,Cell Division - 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 × 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. more...
- Published
- 2009