Effect of exogenous Spd on chlorophyll content and fluorescence characteristics ofImpatiens walleranaHook.f.under salt stress

Using Impatiens walleranaHook.f. flowering stage seedlings as test materials, the effects of different concentrations of exogenous arginine (Spd) on its chlorophyll content and fluorescence characteristics were studied under 100mmol/L NaCl stress. The results showed that exogenous Spd (0.6mmol/L) could significantly increase the photosynthetic pigment content of Impatiens walleranaHook.f. leaves under NaCl stress, and the photosynthetic fluorescence parameters Fv/ Fm, ETR, Y, qPincreased, while Fodecreased. Therefore, Spd can effectively alleviate the damage of NaCl stress to Impatiens walleranaHook.f.