Abstract: Deals with the physiological adaption of winter wheat seedling’s root to soil drought. The results showed that root water potential, root RWC and root activity decreased with soil water decreasing, and root WSD, soluble sugar content, proline content, the permeability of plasma membrane, and SOD activity, POD activity in root of Luomai 9133 and Jimai 21 increased with soil water decreasing. In conclusion, winter wheat seedling’s root increased drought-resistance by physiological changes in root, such as water potential, RWC and root activity reduced, soluble sugar content and proline content increased, and SOD and POD activity enhanced, etc. On the basis of above physiological changes in root, winter wheat seedling adapted to soil drought.

Key words: soil drought, winter wheat, root