Study on the effect of salicylic acid on cold resistance of seedlings of Rhododendron

To study the effects of Salicylic acid(SA)on physiological indexes of Rhododendron hybridumunder low temperature stress,the seedlings of cultivar of Fenhong were pretreated with Salicylic acid of different concentration(0.3、0.5、1.0、1.5、2.0 mmol·L-1),with spraying water as the control.and the physiological indexes changes of Rhododendron hybridum under low temperature at 0℃ for 4days were observed.The results showed that SA solution of different concentration could improve the chilling tolerance of seedlings,among which the 0.5 mmol·L-1 solution was the best.