Genotypic Difference in Plant Growth and Mineral Composition in Barley Under Aluminum Stress

作     者：GUOTian-rong ZHANGGuo-ping WUFei-bo CHENJin-xin ZHOUMei-xue 

作者机构：AgronomyDepartmentZhejiangUniversityHangzhou310029P.R.China TasmanianInstituteofAgriculturalResearchUniversityofTasmanianKindsMeadowsTasmanian7249Australia 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2003年第2卷第5期

页      面：494-501页

学科分类：09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 090302[农学-植物营养学] 

基　　金：China Australian Special Link Research Program Australian Bureau of Cereal Research and Development Project(UT-8) 

主　　题：Aluminum toxicity Barley (Hordeum vulgare L. ) Genotype Growth Mineral nutrient 

摘      要：Four barley genotypes (Tiantaiyangdamai, Xiyin2, Mimaill4 and Tai94-Ce6) were exposed to 0, 50, 100, and 150μM of Al-containing solution with pH 4.5, to determine the differences in growth inhibition , Al concentration and accumulation and mineral composition among genotypes. The results showed that Mimaill4 and Tai94-Ce6 had significantly higher Al concentration and accumulation than Tiantaiyangdami and Xiyin2, especially in roots, and the growth traits including root and shoot dry weights, shoot height, root length and tillers per plant were more inhibited in the former two genotypes. Al treatments caused a significant reduction of N, P, K, Ca, Mg and Mn content in both roots and shoots, of Cu in shoots; and a significant increase in Fe and Zn content in both roots and shoots, of Cu in roots. The changed rates of mineral content caused by Al treatments, in terms of the content in 150μM Al divided by the content in the control, differed significantly among four genotypes. Two Al-sensitive genotypes, Mimaill4 and Tai94-Ce6 had much greater changes in mineral content than other two Al-tolerant genotypes Tiantaiyangdamai and Xiyin2 when subjected to Al stress in comparison with the control. It is indicated that the Al-tolerant genotype is characterized by less uptake and accumulation of Al in roots and smaller disorders in mineral metabolism and ion homeostasis.