水杨酸对盐胁迫下油菜幼苗生长抑制的缓解效应

摘要

以油菜品种＂美国巨荚油王＂为材料,采用室内水培实验研究了不同浓度SA处理对0.1mmol/LNaCl胁迫下油菜幼苗生长的影响.结果表明：盐胁迫下,油菜幼苗叶片内叶绿素含量及过氧化物酶活性明显降低,脯氨酸和丙二醛（MDA）含量明显增加.外施SA明显提高了盐胁迫下油菜幼苗叶片内叶绿素含量、过氧化物酶活性及脯氨酸含量,使膜脂过氧化产物MDA含量明显降低.外施SA可以缓解盐胁迫对幼苗生长的抑制作用,并以0.15mmol/L,0.2mmol/L SA缓解效果最好.%Using rape ＂American oil giant pods king＂as the material, effects of the different concentration of salicylic acid on the growth of rape seedling under 0.1 mmol/L NaC1 stress was studied by hydroponic culture. The results showed as follow： under salt stress, the content of chlorophyll and the activity of POD were significantly decreased than those control, the content of proline and MDA were significantly increased. Exogenous SA can effectively mitigate the harmful effects from salt stress on plants, and the effect of 0.15 mmol/L and 0.2 mmol/L SA were optimal.