Responsible for the provision of inositol required for synthesis of phosphatidylinositol and polyphosphoinositides. a myo-inositol phosphate + H2O = myo-inositol + phosphate Polyol metabolism; myo-inositol biosynthesis; myo-inositol from D-glucose 6-phosphate: step 2/2. Low expression in roots, stems, leaves, flowers and young and mature green fruits. Expressed in the stem/leaf junctions, below the shoot apex and on the abaxial side of the petiole of the first expanded leaflets. Down-regulated by Li(+) and inositol. Belongs to the inositol monophosphatase superfamily.