Rice Science

RICE SCIENCE

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Effects of Low Phosphorus Stress on Membrane Lipid Peroxidation and Protective Enzyme Activities in Leaves of Different Rice Oryza sativa) Cultivars

PAN Xiao-hua; LIU Shui-ying; LI Feng; LI Mu-ying   

  1. College of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China
  • 收稿日期:2002-10-24 修回日期:1900-01-01 出版日期:2003-10-18 发布日期:2003-10-18

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摘要： Membrane lipid peroxidation and protective enzyme activity in leaves of lowphosphorustolerant rice cultivars Dalidao and Liantangzao 3, and lowphosphorussensitive cultivars Huzhanqi and Xinsanbaili were studied under low phosphorus stress with sandy culture. Results indicated that lowphosphorus stress aggravated the membrane lipid peroxidation in rice leaves, and it was more severe in lowphosphorus sensitive cultivars than that in lowphosphorus tolerant cultivars. During the period of lowphosphorus stress, the activities of SOD, CAT and POD maintained relatively stable in lowphosphorus tolerant cultivars, whereas those increased obviously at early stage and subsequently decreased rapidly in the low phosphorus sensitive cultivars, suggesting that the absolute activities of protective enzymes had no relation with the lowphosphorus stress, while the changing trend was reverse.

关键词: rice, phosphorus, stress, membrane lipid peroxidation, protective enzymes