May participate in the regulation of the hexose level in mature tissues and in the utilization of sucrose stored in vacuoles. Hydrolysis of terminal non-reducing beta-D-fructofuranoside residues in beta-D-fructofuranosides. Monomer (PubMed:1541302). May be present in two forms, a 70 kDa monomer and a heterodimer of the 30 kDa and 38 kDa subunits (By similarity). The ratio of the levels of the two forms within cells appears to be regulated developmentally (By similarity). May be released into the lumen of the vacuole from the tonoplast through a proteolytic processing. N-glycosylated; high-mannose and high-xylose complex glycans. There are at least three isozymes of beta-fructofuranosidase in carrot: one insoluble and two soluble ones. Belongs to the glycosyl hydrolase 32 family.