镉胁迫对不同基因型玉米幼苗生理生化指标的影响  

Effects of Cd^(2+) Stress on Physiological Characteristics of Different Maize Genotypes

作　　者：郑世英[1] 刘红英[1] 

机构地区：[1]德州学院生物系,山东德州253023

出　　处：《湖北农业科学》2007年第5期704-706,共3页Hubei Agricultural Sciences

基　　金：德州学院科研项目(05031)

摘　　要：采用室内试验方法,研究了不同浓度的Cd2+胁迫对两个玉米品种幼苗叶绿素含量、游离脯氨酸含量、根系活力、细胞膜透性及蛋白质含量的影响。结果表明,在0.5 mg·L-1、1.0 mg·L-1 Cd2+胁迫下,叶绿素含量与对照差异不显著,随着Cd2+浓度的提高,叶绿素含量显著降低。脯氨酸含量随着Cd2+浓度的升高而逐渐上升。低浓度的Cd2+胁迫对根系活力有刺激作用,随着Cd2+浓度的提高,根系活力逐渐降低。细胞膜透性和可溶性蛋白质均随着Cd2+胁迫浓度的提高呈逐渐增加的趋势。ffects of Cd^2＋ stress on the contents of chlorophyll and Pro,root activity,membrane permeability and protein content. The results showed that the content of chlorophyll do not change markedly when Cd^2＋ was 0.5 mg·L^-1 and 1.0 mg·L^-1 but it would decrease with increasing of Cd^2＋ concentrations. Pro content would increase with increasing of Cd^2＋ concentrations. Cd^2＋ was capable of stimulating root activity at low concentrations,then with increasing of Cd^2＋ concentrations root activity would decrease. Membrane permeability and protein contents would increase with increasing of Cd^2＋.

关 键 词：镉(Cd^2+) 玉米 蛋白质 脯氨酸 根系活力 

分 类 号：X503.231[环境科学与工程—环境工程] O614.242[理学—无机化学]