Sucrose synthase activity in the sus1/sus2/sus3/sus4 Arabidopsis mutant is sufficient to support normal cellulose and starch production.
Baroja-Fernández E, Muñoz FJ, Li J, Bahaji A, Almagro G, Montero M, Etxeberria E, Hidalgo M, Sesma MT, Pozueta-Romero J. Proc Natl Acad Sci U S A. 2012 Jan 3; 109(1):321-6. Epub 2011 Dec 19.