【摘要】 以二叶一心期小麦幼苗为试材在自然干旱条件下用５．０×１０－４ＡＳＡ处理，结果表明：随着水分亏缺天数的增加，ＡＳＡ可明显降低超氧阴离子自由基（Ｏ２）的含量；提高超氧化物歧化酶（ＳＯＤ）和过氧化物酶（ＰＯＤ）的活性；降低脂氧合酶（ＬＯＸ）、酸性磷酯酶和过氧化氢酶活性；降低了膜脂过氧化主要产物丙二醛（ＭＤＡ）的含量，同时使过氧化氢（Ｈ２Ｏ２）的含量有所增加。ＡＳＡ使膜结构与功能在水分亏缺下得到保护，从而提高了小麦的抗旱性。更多还原

【Abstract】 The wheat (Triticum aestivum L.) seedlingr with two leaves were treated by 5.0×10-4 ASA under water deficiency. The results showed that within 1 to 3d under water deficiency, ASA could enhance activities of superoxidedismuthe (SOD) and peroxidase (POD) singnificantly. To some extent the content of MDA, the activities oflipoxidase (LOX), acid phosphatase and catalase (CAT) were inhibited by ASA. Measurements of superoxide anion(O2) and hydrogen peroxide (H2O2) indicated that there was a significant decrease in O2 content and a slight increase in H2O2 content. Therefore, after treatment of wheat seedlings ASA could protect the function and structure ofmembrane and enhance the drought-resistance of wheat seedlings.更多还原