铝、镉、铜互作对不同耐铝大麦基因型糖及蛋白含量的影响

所有胁迫处理均导致耐性品种根系和叶片的蛋白质含量增加,三重复合胁迫时最高.低pH和Cu,Cd,Al复合胁迫使敏感基因型根系蛋白质含量增加而叶片蛋白质含量减少,其它胁迫结果恰好相反.Cu与Cd以及Cu,Cd,Al复合胁迫使耐性品种根系和叶片可溶性糖含量增加,单独Al胁迫使耐性品种根系和叶片可溶性糖含量减少,但对敏感基因型的影响因器官而异.Cu与Cd复合胁迫及单独Al胁迫均使耐性品种根系还原糖含量减少而使叶片还原糖含量增加,但对敏感基因型的影响存在差异;Cu,Cd,Al复合胁迫使敏感基因型根系、叶片和耐性品种根系还原糖含量增加,却使耐性品种叶片还原糖含量减少.各种胁迫处理均使耐性品种根系和叶片总糖含量下降,但敏感品种器官和处理间结果存在显著差异.

Effect of Al,Cu and Cd Interaction on Sugar and Protein Contents of Barleys Differing in Al Tolerance

Protein content increased under all the stress treatments,especially for the ternary combinations in Al-tolerant genotype,while it increased in roots and decreased in leaves in Al-sensitive genotype under low pH and the combined toxicity of Al,Cd,Cu,and the results of other two stress treatments were in adverse.The content of soluble sugar increased in roots of the tolerant one and in leaves for both genotypes,and decreased in roots of Al-sensitive genotype under the combined toxicity.The reductive sugar contents decreased in roots and increased in leaves of tolerant genotype under the combined toxicity of Cu,Cd and Al treatments alone.The contents of whole sugar reduced in roots and leaves of tolerant genotype,while there were significant differences among treatments in sensitive genotype.