Acts as a glycerol-3-phosphatase with higher stereospecificity for L-glycerol-3-phosphate than DL-glycerol-3-phosphate. H2O + sn-glycerol 1-phosphate = glycerol + phosphate H2O + sn-glycerol 3-phosphate = glycerol + phosphate Optimum pH is 7.0. Ubiquitous with highest expression in siliques. Mainly restricted to the meristem of immature flower and vascular elements of the root, shoot, leave, siliqua and developing embryo (at the protein level). Belongs to the HAD-like hydrolase superfamily. DOG/GPP family. Truncated N-terminus.