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Overexpression of a pectin methylesterase inhibitor in Arabidopsis thaliana leads to altered growth morphology of the stem and defective organ separation

Müller, Kerstin and Levesque-Tremblay, Gabriel and Fernandes, Anwesha and Wormit, Alexandra and Bartels, Sebastian and Usadel, Bjoern and Kermode, Allison. (2013) Overexpression of a pectin methylesterase inhibitor in Arabidopsis thaliana leads to altered growth morphology of the stem and defective organ separation. Plant signaling & behavior, Vol. 8, H. 12 , e26464.

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Official URL: http://edoc.unibas.ch/dok/A6183878

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Abstract

The methylesterification status of cell wall pectins, mediated through the interplay of pectin methylesterases (PMEs) and pectin methylesterase inhibitors (PMEIs), influences the biophysical properties of plant cell walls. We found that the overexpression of a PMEI gene in Arabidopsis thaliana plants caused the stems to develop twists and loops, most strongly around points on the stem where leaves or inflorescences failed to separate from the main stem. Altered elasticity of the stem, underdevelopment of the leaf cuticle, and changes in the sugar composition of the cell walls of stems were evident in the PMEI overexpression lines. We discuss the mechanisms that potentially underlie the aberrant growth phenotypes.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Ehemalige Einheiten Umweltwissenschaften > Pflanzenphysiologie Pathogenabwehr (Boller)
UniBasel Contributors:Merker, Sebastian
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Landes Bioscience
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:06 Dec 2013 09:35
Deposited On:06 Dec 2013 09:35

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