Effects of exogenous betaine on the seeds germination and physiological characteristics of Pyrus betulaefolia seedlings
The effects of five concentrations of exogenous betaine(0,0.5,1.0,5.0,10.0 mmol/L)on the seeds germination,seedling growth,and physiological characteristics of Pyrus betulaefolia under 100 mmol/L NaCl were investigated,with the treatment without betaine as the control.The results indicated that treatments with exogenous betaine at various concentrations signif-icantly promoted the germination of P.betulaefolia seeds and the aboveground growth of seedlings under salt stress,with the treatment of 1.0 mmol/L betaine showing the most significant impact.The germination rate and germination potential,seedling height,aboveground fresh weight,leaf su-peroxide dismutase,peroxidase and catalase activities,chlorophyll content,and net photosynthetic rate were significantly higher than those of the control and the other three treatments;while the MDA content was lower than that of the control and the other three treatments.
万方数据
维普
