电场处理对干旱胁迫下油葵叶细胞膜脂反应的影响

The Influence of Electric Field on the Leaf Cell Membrane of Oil Sunflower under Drought-stress

用不同强度的电场处理3个油葵(HelianthusannuusL.)品种的种子,研究其在干旱胁迫条件下幼苗期对干旱胁迫的反应,并分析了电场影响抗旱性的机理。结果表明:电场处理能提高幼苗期叶片中超氧化物歧化酶(SOD)活性,降低膜脂过氧化产物丙二醛(MDA)的含量;降低为膜所束缚的酸性磷酸酯酶(ACP)活性,在一定程度上阻止了干旱胁迫下活性氧对膜组分中不饱和脂肪酸的氧化。说明电场处理可使膜结构与功能在水分亏缺下得到保护,促进幼苗的代谢水平,从而提高了油葵的抗(耐)旱性。

The electric fields with the different density were used to treat the seeds of 3 oil sunflower （Helianthus annuu.; L. ）varieties to study the reacts of seedlings to the drought stress and analyze the mechanism of electric field influence on the drought-resistance. The results showed that, under drought stress during the stage of seedlings, electric field increased the activity of superoxide dismutate （SOD）, delayed the accumulation of malon-dialdehyde（MDA）, decreased the activities of phosphatase （ACP）, and retarded the peroxidation of unsaturated fatty acids on the membrane caused by active oxygen to some extent. Electric treatment could protect the function and structure of membrane, promote the metabolism of seed and seedlings and enhance the drought-resistance of oil sunflower.