H_2O_2对低温下油菜幼苗几个生理指标的影响  

Effects of H_2O_2 on Some Physiological Indexes of Rape Seedlings under Chilling Stress

作　　者：侯丽霞[1] 

机构地区：[1]青岛农业大学生命科学学院/山东省高校植物生物技术重点实验室,山东青岛266109

出　　处：《湖北农业科学》2013年第21期5144-5146,5152,共4页Hubei Agricultural Sciences

基　　金：青岛市自然科学基金项目(12-1-4-5-(12)-jch);青岛农业大学高层次人才启动基金项目(630722)

摘　　要：以油菜为试验材料,研究不同浓度外源过氧化氢(H2O2)对油菜幼苗抗冷生理指标的影响。结果表明,利用H2O2喷施后,油菜幼苗叶片在低温胁迫下丙二醛(MDA)含量呈明显下降趋势,叶绿素含量、脯氨酸含量和超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)等保护酶的活性呈升高趋势。可见H2O2预处理可以提高油菜幼苗的抗冷性,以0.3 mmol/L H2O2处理效果最好,推测H2O2通过降低对膜脂的氧化、提高叶绿素含量和提高保护酶活性等缓解低温对油菜幼苗的伤害。Using the rape seedlings as experiment materials, the effects of different concentrations of H2 O2 on some physiolog- ical indexes of rape seedlings under chilling stress were studied. The results showed that the exogenous H2 O2 could reduce the content of MDA in rape seedlings leaves under low temperature. At the same time, it could enhance both the contents of chlorophyl and praline and the cell defensive enzymes activity. These results indicated that H2 O2 could remit the effect of chilling stress on the rape seedlings and the effect of 0.3 mmol/L H2 O2 was the best.

关 键 词：油菜幼苗 过氧化氢(H2 O2) 低温胁迫 生理指标 

分 类 号：Q945.78[生物学—植物学]