镉胁迫对小麦种子萌发和幼苗生长的影响  

Influences of Cd^(2+) Stress on Seed Germination and Seedling Growth of Wheat

作　　者：樊明琴[1] 李焰焰[1] 苗杰[1] 于海洋[1] 

机构地区：[1]阜阳师范学院生命科学学院,安徽阜阳236041

出　　处：《安徽农业科学》2010年第26期14239-14241,共3页Journal of Anhui Agricultural Sciences

基　　金：国家科技支撑计划项目(2009BADA6B06-5);安徽省教育厅自然科学研究项目(KJ2009B020)

摘　　要：以新麦18为材料,研究不同浓度Cd2+对其种子萌发和幼苗生长的影响。结果表明,低浓度(2mg/L)Cd2+可促进小麦种子萌发,而高浓度Cd2+对小麦种子萌发具有抑制作用。随着Cd2+处理浓度的升高,小麦幼苗叶绿素含量下降,超氧化物歧化酶(SOD)、过氧化物酶(POD)活性升高。但随着Cd2+处理时间的延长,小麦幼苗SOD、POD活性下降,丙二醛(MDA)和脯氨酸(Pro)含量上升。With Xinmai 18 as the material,the influences of Cd2＋ with different concns.on seed germination and seedling growth of it were investigated.The results showed that Cd2＋ with low concn（2 mg/L）.could improve seed germination of wheat,while Cd2＋ with high concn.had inhibition on seed germination of wheat.With the increase of Cd2＋ concn.,the content of chlorophyll in leaves of wheat seedlings was reduced and the activities of SOD and POD were increased.But with the delay of treating time by Cd2＋ Stress,the activities of SOD and POD in wheat seedling were decreased and the contents of MDA and Pro were increased.

关 键 词：镉 小麦 叶绿素 SOD POD MDA 

分 类 号：S512.1[农业科学—作物学]