Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir Region Area, Chongqing Three Gorges University, Wanzhou 404100, China.
Key Laboratory of Eco-environments in the Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing 400715, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jun 5;198:88-91. doi: 10.1016/j.saa.2018.02.039. Epub 2018 Feb 13.
The present paper deals with the physiological response of the changes in chemical contents of the root, stem and leaf of Arundo donax seedlings stressed by excess cadmium using Fourier transform infrared spectroscopy technique, cadmium accumulation in plant by atomic absorption spectroscopy were tested after different concentrations cadmium stress. The results showed that low cadmium concentrations (<1.0mg/L) the root tissue of Arundo donax uses osmosis of organic substances (e.g. carbohydrates and amino acids) to improve cadmium tolerance. Organic substances (e.g. carbohydrates) that contain a lot of OH in leaf were transported to the root firstly and then could chelate cadmium, but no obvious changes in stems were noted. The cadmium in the shoots (stem and leaf) usually increased with increasing cadmium concentration. These studies demonstrate the potential of Fourier transform infrared spectroscopy technique for the non-invasive and rapid monitoring of the plants stressed with heavy metals, Arundo donax is suitable for phytoremediation of cadmium -contaminated wetland.
本研究采用傅里叶变换红外光谱技术研究了过量镉胁迫对芦竹幼苗根、茎、叶化学含量变化的生理响应，并用原子吸收光谱法测定了不同浓度镉胁迫后植物对镉的积累。结果表明，低浓度镉（<1.0mg/L）胁迫下，芦竹根组织利用有机物质（如碳水化合物和氨基酸）的渗透作用来提高镉的耐受性。叶中含有大量 OH 的有机物质（如碳水化合物）首先被运输到根组织，然后与镉螯合，但茎组织没有明显变化。地上部分（茎和叶）中的镉含量通常随镉浓度的增加而增加。这些研究表明，傅里叶变换红外光谱技术在重金属胁迫下植物的非侵入性和快速监测方面具有潜力，芦竹适合用于镉污染湿地的植物修复。
