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- Title
Fructokinase is required for carbon partitioning to cellulose in aspen wood.
- Authors
Roach, Melissa; Gerber, Lorenz; Sandquist, David; Gorzsás, András; Hedenström, Mattias; Kumar, Manoj; Steinhauser, Marie Caroline; Feil, Regina; Daniel, Geoffrey; Stitt, Mark; Sundberg, Björn; Niittylä, Totte
- Abstract
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.
- Subjects
FRUCTOKINASE; CELLULOSE; CARBON; ASPEN (Trees); PLANT species; SUCROSE; BIOMASS; PLANT metabolism
- Publication
Plant Journal, 2012, Vol 70, Issue 6, p967
- ISSN
0960-7412
- Publication type
Article
- DOI
10.1111/j.1365-313X.2012.04929.x