Hydrolyzes p-nitrophenyl beta-D-glucoside, p-nitrophenyl beta-D-galactoside and natural glucosides such as salicin, p-coumaryl alcohol glucoside, phenyl-beta-D-glucoside, coniferin, syringin and arbutin. May be involved in lignification by hydrolyzing monolignol glucosides. Hydrolysis of terminal, non-reducing beta-D-glucosyl residues with release of beta-D-glucose. A number of isoforms are produced. According to EST sequences. Expressed in roots and stems. Belongs to the glycosyl hydrolase 1 family.