Abstract: A hydroponic method was used to investigate the effect of drought and salt stresses on the distribution rule of Na⁺ and K⁺ in shoots and roots and the dynamic transformation of soluble sugars, soluble protein and proline in leaves of drought-and salt-tolerant winter wheat cultivar Cang-6001. The results showed that the accumulation rule of soluble sugars and protein in leaves was similar, which were increased with prolonging stress time, but decreased in the later period of stress treatments. When the concentration of PEG or NaCl was increased, the time that sugars and protein began to decrease advanced; proline was increased quickly firstly and decreased quickly after reaching peak value，but increased once again in the later period of drought stress condition, which was increased with increased NaCl concentration and prolonging stress time under salt stress condition; the content of Na⁺ in plant was decreased with increased PEG concentration but increased with increased NaCl concentration, the content of K⁺ were decreased with increased PEG or NaCl concentration, and the speed of fall was faster in root than in shoot.

Key words: winter wheat, drought stress, salt stress, soluble sugars, proline, ion