Too much is bad--an appraisal of phytotoxicity of elevated plant-beneficial heavy metal ions.

摘要: Heavy metal ions such as cobalt (Co), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn) are considered essential/beneficial for optimal plant growth, development, productivity. However, these readily impact functions of many enzymes proteins, halt metabolism, exhibit phytotoxicity at supra-optimum supply. Nevertheless, the concentrations heavy increasing in agricultural soils worldwide via both natural anthropogenic sources that need immediate attention. Considering recent breakthroughs on Co, Cu, Fe, Mn, Mo, Ni, Zn soil–plant system, present paper: (a) overviews status their uptake, transport, significance plants; (b) critically discusses elevated level-mediated toxicity to growth/development cell/genome; (c) briefly cross talks potential interactions between previous plant-beneficial (d) highlights so far unexplored aspects current context.