Hydrolyzes inulin-type beta-(2,1)-fructans. Has low activity against beta-(2,6)-linked fructans. May play a role as a beta-(2,1)-trimmer during graminan biosynthesis. Hydrolysis of terminal, non-reducing (2->1)-linked beta-D-fructofuranose residues in fructans. Inhibited by sucrose. Detected in leaves, with maximum levels at the leaf tip. In the first section of the leaf sheath expression decreases after 7 days of cold treatment. In the second section of the leaf sheath expression increases upon cold treatment. In the thrid section of the leaf sheath and the first section from the leaf blade expression increases in the first 4 days of cold treatment before returning to its original levels. In the leaf tip expression decreases after 2 days of cold treatment. Belongs to the glycosyl hydrolase 32 family.