Kinase that phosphorylates myo-inositol to produce multiple myo-inositol monophosphates. Participates in phytic acid biosynthesis in developing seeds. Phytic acid is the primary storage form of phosphorus in cereal grains and other plant seeds. ATP + myo-inositol = 1D-myo-inositol 3-phosphate + ADP + H(+) Low inositol hexakisphosphate (phytate) levels in seed tissue. Belongs to the carbohydrate kinase pfkB family.