sucrose biosynthesis pathway saccharose biosynthesis GO:0005986 UPa:UPA00371 Biosynthesis of sucrose (saccharose, 1-alpha-D-glucopyranosyl-2-beta-D-fructofuranoside), a disaccharide composed of glucose and fructose. In most plants, sucrose is the main product of photosynthesis that is exported from the leaves to fuel growth and synthesis of storage reserves, such as starch and oil, and sucrose itself is often accumulated by plant cells to protect against the effects of dehydration under drought, salinity, or cold stress. Apart from plants, some species of cyanobacteria also synthesize sucrose, often in response to osmotic stress. KEGG:map00500 1-alpha-D-glucopyranosyl-2-beta-D-fructofuranoside biosynthesis KEGG:map01100 glycan biosynthesis