论文部分内容阅读
以盐敏感品种中国春、农大８５０２１和抗盐品种冬６８、茶淀红等４个品种小麦（ＴｒｉｔｉｃｕｍａｅｓｔｉｖｕｍＬ．）为材料，研究盐分胁迫对小麦种子萌发和幼苗生长的影响以及水杨酸对盐害的缓解作用．结果表明，水杨酸能够相对提高盐分胁迫条件下小麦种子萌发的数量、速度和质量；提高幼苗根和叶内游离脯氨酸、可溶性糖等渗透调节物质的含量，增强其渗透调节能力，同时提高幼苗体内超氧化物歧化酶、过氧化物酶等细胞保护酶的活性，抑制膜脂过氧化作用产物丙二醛的积累，降低叶片质膜透性和盐分胁迫对细胞膜的伤害．所有这些变化都有利于缓解盐害，提高小麦抗盐性
The effects of salt stress on the seed germination and seedling growth of wheat were studied with four varieties of wheat (Triticum aestivum L.), which were salt-sensitive varieties Chinese Spring, Nongda 85021, salt-tolerant winter wheat 68 and Chadian red, Ease the role. The results showed that salicylic acid could relatively increase the quantity, speed and quality of wheat seed germination under salt stress, increase the contents of free proline, soluble sugar and other osmotic adjustment substances in roots and leaves of seedlings and enhance their osmotic adjustment ability. Increase the activity of superoxide dismutase, peroxidase and other cytoprotective enzymes in seedlings, inhibit the accumulation of malondialdehyde (MDA), a product of membrane lipid peroxidation, and reduce the damage of membrane permeability caused by plasma membrane permeability and salinity stress. All of these changes are conducive to alleviating salt damage, improve wheat salt resistance