Abstract:

The tomatoes were selected as the experimental material, effect of treat with different concentrations of exogenous growth regulators on physiological reaction during the flowering period. It was showed that the cold resistance was increased through the abscisic acid, salicylic acid, paclobutrazol, jasmonic acid, and the cold resistance was increased in higher concentrations. Conductivity was reducing significantly in 150μg/g ABA and 300 mg/L salicylic acid. With growth of induced concentrations, proline and soluble soluble sugar were higher than in the control, but soluble protein was decreased. In addition, there are different effects of exogenous growth regulators on varieties but enhance cold-resistance were appearance.