concept

sucrose

Facts (10)

Sources

The role of light in regulating plant growth, development and sugar ... frontiersin.org Frontiers Jan 6, 2025 10 facts

referenceIn Arabidopsis, sucrose and light regulate the cold-inducible UDP-glucose pyrophosphorylase gene through a pathway that is independent of hexokinase and insensitive to abscisic acid.

claimYang L. Y. et al. (2019) reported that low light stress inhibits the metabolism of sucrose and galactosyl-sucrose oligosaccharides in the leaves and fruits of melon (Cucumis melo L.).

claimGutmann et al. (2017) found that using plant sucrose synthases instead of bacterial sucrose synthases improves UDP-glucose recycling from sucrose and UDP in glycosyltransferase cascades for natural product glycosylation.

referenceSucrose synthase, encoded by genes VvSWEET10, VvSUC11, and VvSUS4, is located in the cytoplasm and mitochondria and catalyzes the conversion of sucrose to UDP-glucose and fructose, a process promoted by red light.

claimRed light promotes radial elongation, increases stomatal density, and increases glucose, sucrose, fructose, and starch content in leaves, as well as cellulose content in stems in cassava (Zhou et al., 2023).

referenceInvertase, encoded by INVs genes, is located in the cytoplasm and vacuole and catalyzes the conversion of sucrose to glucose, a process promoted by red light.

claimIn grape skins, where fructose, glucose, and sucrose are the primary sugars, blue light treatment results in the highest total sugar content, followed by red light treatment, according to Kondo et al. (2014).

referenceSucrose phosphate synthase, encoded by the gene OsSPS, is located in the cytoplasm and chloroplast and catalyzes the conversion of UDP-glucose to sucrose, a process promoted by natural light.

procedureDuring plant photosynthesis, chloroplasts absorb light energy to generate sucrose; this sucrose is catalyzed by invertase (INV) in the vacuole to generate glucose, which is then catalyzed by sucrose synthase (SUS) in the mitochondria to generate UDP-glucose, which is subsequently acted upon by UGPase in the cell nucleus and converted into polysaccharides by glycosyltransferases (GTs), with light participating to ensure energy supply for these processes.

claimYonekura M. et al. (2013) reported that the promoter activities of sucrose phosphate synthase genes OsSPS1 and OsSPS11 in rice are controlled by light and the circadian clock, but not by sucrose.