Possible role in the continued mobilization of sucrose to sink organs (PubMed:20207708). Regulates root elongation (PubMed:16481625). Hydrolysis of terminal non-reducing beta-D-fructofuranoside residues in beta-D-fructofuranosides. Inhibited by C/VIF1 and C/VIF2. Glycan biosynthesis; sucrose metabolism. May be present in two forms, a 70 kDa monomer and a heterodimer of the 30 kDa and 38 kDa subunits. The ratio of the levels of the two forms within cells appears to be regulated developmentally (By similarity). Located in the lytic vacuole but not in the protein storage vacuole. Remains inserted into membranes on its way to the lytic vacuole, following the classical sorting pathway from the endoplasmic reticulum. Released into the lumen of the vacuole from the tonoplast through a proteolytic processing. Mostly expressed in stems, roots and flowers, and, to a lower extent, in mature leaves. Expressed during germination et seedling growth. Induced by gibberellin (e.g. gibberellic acid GA) that accumulates in seeds after red light treatment (PubMed:15056893). Accumulates upon infection with virulent but not with avirulent P.syringae (PubMed:16807755). Degraded in a VPEgamma-dependent manner during senescence (PubMed:12773619). The LCPYTRL domain (18-24) is critical for trafficking from the trans-Golgi network to the prevacuolar compartment and from the prevacuolar compartment to the central vacuole (PubMed:21899678). The PRRRRP domain (36-41) is involved in sorting to the vacuole (PubMed:23737500). At least two Arg are needed for correct delivery and the presence of two neighboring Pro seems to contribute to the sorting efficiency (PubMed:23737500). Reduced carbon fixation rates during the day, but increased respiration during the night (PubMed:20207708). Shorter roots (PubMed:16481625). Belongs to the glycosyl hydrolase 32 family. Truncated N-terminus.