Loss of the two major leaf isoforms of sucrose-phosphate synthase in Arabidopsis thaliana limits sucrose synthesis and nocturnal starch degradation but does not alter carbon partitioning during photosynthesis.
Volkert K, Debast S, Voll LM, Voll H, Schießl I, Hofmann J, Schneider S, Börnke F. J Exp Bot. 2014 Oct; 65(18):5217-29. Epub 2014 Jul 3.