Effect of Spermidine on Membrane Lipid Peroxidation in Flowers of Tree Peony(Paeonia suffruticosa)

This work was aimed to probe into the effect of Spermidine(Spd) on membrane lipid peroxidation of the tree peony(Paeonia suffruticosa) petals.Several physiological indexes related to membrane lipid peroxidation,SOD activity,the production rate of superoxide anion,malondialdehyde(MDA) content and relative conductivity were detected during florescence.The results showed that the SOD activity increased and the others reduced during florescence after the tree peonies were sprayed in green bud with 0.2 and 0.5 mmol·L-1 Spd,and 0.2 mmol·L-1Spd had better effects.However,these effects went by contraries when the 0.8 mmol·L-1 Spd solution was sprayed.