Exogenous polyamines alleviate the lipid peroxidation induced by cadmium chloride stress in <i>Malus hupehensis</i> Rehd.期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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*Exogenous polyamines alleviate the lipid peroxidation induced by cadmium chloride stress in Malus hupehensis* Rehd.**

Authors:	Haizhou Zhao Hongqiang Yang

Institution:	^aCollege of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an, Shandong 271018, China ^bState Key Laboratory of Crop Biology, Tai’an, Shandong 271018, China

Abstract:	In order to investigate the effects of spermidine (Spd) and spermine (Spm) on the stress of cadmium chloride (CdCl₂), it was checked that the content of polyamines and malondialdehyde (MDA), the rate of superoxide anion (O₂⁻) generation and the activities of superoxidase dismutase (SOD) and guaiacol peroxidase (GPX) in 1-year-old Malus hupehensis Rehd. var. pinyiensis Jiang (tea crabapple) seedlings grown in nutrient solution. The result showed that the content of free putrescine (Put) was increased, the contents of free Spd and Spm and the (Spd + Spm)/Put ratio in leaves were decreased significantly under CdCl₂ treatment. Foliar spraying with Spd or Spm under CdCl₂ treatment, the accumulation of free Put reduced, the contents of free Spd and Spm and the ratio of (Spd + Spm)/Put in leaves increased significantly. The activities of SOD and GPX in leaves were enhanced and O₂⁻ generation rate and MDA content were decreased significantly by foliar spraying with Spd or Spm under CdCl₂ treatment. Results suggest that both Spd and Spm can alleviate the lipid peroxidation caused by CdCl₂ in M. hupehensis var. pinyiensis.

Keywords:	Malus hupehensis var pinyiensis Polyamines Cadmium chloride Lipid peroxidation
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