文献类型：期刊文献

英文题名：Physiological changes in barley plants under combined toxicity of aluminum, copper and cadmium

作者：Guo, Tian Rong[1]; Zhang, Guo Ping[2]; Zhang, Yan Hua[1]

机构：[1]Shaoxing Univ, Shaoxing 312000, Peoples R China;[2]Zhejiang Univ, Dept Agron, Hangzhou 31002, Peoples R China

年份：2007

卷号：57

期号：2

起止页码：182

外文期刊名：COLLOIDS AND SURFACES B-BIOINTERFACES

收录：SCI-EXPANDED(收录号：WOS:000246950600006)、、EI(收录号：20071910586953)、Scopus(收录号：2-s2.0-34247606779)、WOS

基金：First author acknowledge the support provided by the Educative Department of Zhejiang Province, Chinese and Australian Bureau of Cereal Research and Development (UT-8), respectively.

语种：英文

外文关键词：aluminum; copper; cadmium; toxicity; barley (Hordeum vulgare L.); plant growth; protein content; sugar content; oxidative stress

外文摘要：Crop production on acid soil is markedly reduced, further, a multiple heavy metal pollution except At on acid soil is detected in many areas. The present study was undertaken to assess the toxicities of Al, Cd, and Cu separately and in combinations, three heavy metals very often coexisting on acid soil, and to identify their interactions in two kinds of barley seedlings differing in Al tolerance. The plant growth, metals accumulations, total soluble protein and sugar contents, MDA contents and the activities of SOD and POD were estimated in roots and leaves after 5-week supply of the heavy metals excess in the nutrient solution. The results indicated that the stress treatments including low pH (pH 4.5) alone all adversely affected plant growth and disturbed the cell metabolism seriously. The development of toxic symptoms corresponded to a high accumulation of Al, Cd, Cu and to a poor increase in soluble sugar contents but to a high increase in MDA contents, to the decrease in soluble protein contents and to the much elevated SOD and POD activities in both roots and leaves. In addition, binary metal combinations of Al + Cd and Al + Cu both produced the synergistic response for the growth of barley seedlings, in particular for Shang 70-119, while, ternary metal combination of Al + Cu + Cd produced different interactions in two kinds of genotypes, thus, the significant synergistic response was seen in Shang 70-119, but the antagonistic response was detected in Gebeina. The different responses to ternary metal combination of two genotypes may result from the different metal bioaccumulation patterns, hence, the existence of Cd and Cu promoted At accumulation in Shang 70-119 but inhibited At accumulation in Gebeina. (C) 2007 Elsevier B.V. All rights reserved.