Phosphoinosidtide (PI) is a major phospholipid in eukaryotic cells, phospholipid signaling pathway (PI pathway) plays a key role in plant growth, development and in responses to environmental stress conditions. Phosphatidylinositol synthase (PIS) is a key enzyme in the phospholipid signaling pathway, and can synthesize Phosphoinosidtide with CDP-DG and myo-inositol. ZmPIS gene is isolated from maize, its coding production PI can be converted into many signaling factors, the factors is important in signal t...