The improvement of salt tolerance is of great importance to enhance wheat （Triticum aestivurn） adaptability to saline and alkalized soils in the practice of wheat cultivation. Under NaCl and H2O2 treat-ments, the plant height of wheat and related physiological parameters were measured to elucidate the effect of H2O2 pre-treatment on salt tolerance of wheat seedlings. Leaf malondialdehyde （MDA） content, rela-tive electrical conductivity （REC）, water soluble sugar （WSS） content, proline content and peroxidase （POD） activity increased with 1. 2% NaCl treatment. However, under H2O2 ＋ 1. 2% NaCl treatment, there was less increment in MDA and REC contents, more increment in WSS content and POD activity, and less decrease in plant height of wheat seedlings compared to those under 1.2% NaCl treatment. It suggested that H2O2 pre-treatment could, to some extent, improve salt tolerance of wheat seedlings, but there was difference in the response to such treatments between two wheat cultivars.%小麦（Triticum aestivum）抗盐性改善的相关研究为实践中提高小麦的抗盐性和适应性提供了重要的理论基础。以小麦为材料,在H2O2、NaCl和H2O2＋NaCl处理下,测定了幼苗的株高和叶片相关生理指标,研究了H2O2前处理对小麦幼苗抗盐性的影响。结果表明,在1.2%NaCl处理下,小麦幼苗叶片丙二醛含量、膜透性、可溶性糖含量、脯氨酸含量和过氧化物酶活性均增加,但H2O2前处理＋1.2%NaCl处理下的小麦幼苗叶片丙二醛含量和相对电导率增加较少而可溶性糖含量和过氧化物酶活性增加较多,株高减少较少。H2O2前处理可在一定程度上增强小麦幼苗抗盐性,但春小麦和冬小麦的反应有差异。
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