Regulating of Exogenous Salicylic Acid on Physiological Metabolism of Sedum aizoon L.under Low Temperature Stress

doi:10.7668/hbnxb.2016.04.023

Abstract

Abstract: In order to analyze the regulating effect of 0,5℃ low temperature treatment on the Sedum aizoon L.with salicylic acid of different concentrations (0,0.5,1.0,2.0,4.0 mmol/L) on membrane permeability,MDA content,antioxidant enzyme activity,soluble protein,proline,chlorophyll content and chlorophyll fluorescence parameter to investigate the effects of its pretreatment on leaf physiological metabolism.The results showed that 0.5,1.0,2.0 mmol/L concentration of salicylic acid processing,salicylic acid treatment could inhibit raising relative conductivity and MDA increasing,improving SOD,POD activity in the leave of Sedum aizoon L.;Increasing soluble protein,proline,chlorophyll content,could also slow down the Fv/Fm decline under low temperature stress,slowed photo inhibition damage to plants, Sedum aizoon L.at low temperatures cold indicators had varying degrees of ease.Evaluation results expressed,salicylic acid concentration of 1.0 mmol/L was the best for 5℃ low temperature stress in Sedum aizoon L..

Key words: Salicylic acid, Low temperature stress, Sedum aizoon L., Physiological metabolism

CLC Number:

S634.01

XU Dongmei, HE Zhongqun, ZHANG Jie. Regulating of Exogenous Salicylic Acid on Physiological Metabolism of Sedum aizoon L.under Low Temperature Stress[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(4): 138-145. doi: 10.7668/hbnxb.2016.04.023.

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