钙离子对烟草富集镉量的影响研究

以烟草为实验材料，分别对种子和幼苗进行镉、钙离子和镉一钙离子不同地处理，对烟草的发芽情况、幼苗生长及根和叶片中镉离子积累情况进行归纳总结分析，结果表明：钙离子在一定程度上对镉的毒性有减缓作用；不同处理的根和茎叶中镉含量变化呈相似的趋势，对照和仅外加钙离子的烟草植株中镉含量几乎为零。随着时间的延伸，镉胁迫处理的植株地上部及根部镉的吸收量均有明显增加，但外施钙离子可以增加镉胁迫下烟草植株中镉的积累。而且统计分析表明不同处理时间其镉的吸收量在0．01水平上有显差异。

The influences of calcium ion to the absorbing amount of the tobacco cadmium

This text regards nicotiana tabacum as the experiment material, carry on the treatment of CK Cd~(2+) and Cd~(2+)-Ca~(2+) to the seed and seedling separately, seedling grow and root and blade Ca~(2+) accumulation sums up to summarize to analyse, the result shows : The Ca~(2+) has function of slowing down on the toxicity of Cd~(2+) to a certain extent; The change of content of Cd~(2+) is the simular trend of the the root of different treatment and stem leaf, contrast and outside with Ca~(2+) plant Cd~(2+) content zero nearly only. With extension of time, plant of treatment that Cd~(2+) coerce department and absorption amount , root of Cd~(2+) increase obviously on the ground, but outside construct Ca~(2+) can increase Cd~(2+) coerce down tobacco accumulation of Cd~(2+) of the plant, and statistical analysis indicates that the absorption amount of its Cd~(2+) is in 0 to deal with time differently.