Genetically modified plant cells with increased starch synthase II activity and increased glucan-water dikinase activity are new. Independent claims are also included for: (1) plants comprising the cells； (2) propagules of the plants； (3) producing genetically modified plants by genetically modifying a plant cells to increase starch synthase II activity and glucan-water dikinase activity, regenerating a plant from the cell and optionally using the plant to generate other plants； (4) producing modified starch by extracting starch from a cell, plant or propagule as above； (5) modified starch produced as above； (6) producing derivatized starch by derivatizing the modified starch； (7) derivatized starch produced as above； (8) flour comprising the modified starch； (9) producing flour by milling plants or propagules as above.
