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Fructokinase is required for carbon partitioning to cellulose in aspen wood
Swedish University of Agricultural Sciences. (UPSC, Dept of Forest Genetics and Plant Physiology)
Swedish University of Agricultural Sciences. (UPSC, Dept of Forest Genetics and Plant Physiology)
Swedish University of Agricultural Sciences. (UPSC, Dept of Forest Genetics and Plant Physiology)
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2012 (English)In: The Plant Journal, ISSN 0960-7412, E-ISSN 1365-313X, Vol. 70, no 6, 967-977 p.Article in journal (Refereed) Published
Abstract [en]

Sucrose is the main transported form of carbon in several plant species, including Populus species. Sucrose metabolism in developing wood has therefore a central role in carbon partitioning to stem biomass. Half of the sucrose-derived carbon is in the form of fructose, but metabolism of fructose has received little attention as a factor in carbon partitioning to walls of wood cells. We show that RNAi-mediated reduction of FRK2 activity in developing wood of hybrid aspen (Populus tremula × tremuloides) led to the accumulation of soluble neutral sugars and a decrease in hexose phosphates and UDP-glucose, indicating that carbon flux to cell-wall polysaccharide precursors is decreased. Reduced FRK2 activity also led to thinner fiber cell walls with a reduction in the proportion of cellulose. No pleiotropic effects on stem height or diameter were observed. The results establish a central role for FRK2 activity in carbon flux to wood cellulose.

Place, publisher, year, edition, pages
2012. Vol. 70, no 6, 967-977 p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:umu:diva-54416DOI: 10.1111/j.1365-313X.2012.04929.xISI: 000305120400006PubMedID: 22288715OAI: oai:DiVA.org:umu-54416DiVA: diva2:523737
Available from: 2012-04-26 Created: 2012-04-26 Last updated: 2017-12-07Bibliographically approved

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Gorzsás, AndrásHedenström, Mattias
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