Chloroplastic invertase that cleaves sucrose into glucose and fructose and is associated with the development of the photosynthetic apparatus and the assimilation of nitrogen in seedlings to control the sucrose to hexose ratio (PubMed:20304912). Participates in the carbon flux between the cytosol and plastids in leaves (PubMed:18034262). Hydrolysis of terminal non-reducing beta-D-fructofuranoside residues in beta-D-fructofuranosides. Expressed in roots, leaves and flowers. No visible phenotype under normal growth conditions, but the mutant plants accumulate decreased amount of starch during the day. Belongs to the glycosyl hydrolase 100 family.