College of Resources and Environmental Science, Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, China.
College of Resources and Environment, Yangtze University, Wuhan, China.
Ecotoxicol Environ Saf. 2021 Mar 15;211:111963. doi: 10.1016/j.ecoenv.2021.111963. Epub 2021 Jan 25.
Pot experiments were conducted to evaluate the effects of magnetized water irrigation (100 mT) and root cutting (three pruning intensities) on phytoremediation efficiency of Celosia argentea. In the absence of magnetic field treatment, low root cutting intensity increased the dry weight of the below-ground and aerial parts of C. argentea. Moderate and severe cutting intensities decreased the biomass yield of the plant roots by 11.3% and 31.0%, and increased the dry weight of aerial parts by 75.9% and 27.6%, respectively, alleviating the detrimental effects of these pruning treatments on the plant roots. In the presence of magnetic field treatment, 10% and 25% of pruning treatments increased the dry weight of plant roots by 52.1% and 33.8%, and 33% pruning treatment decreased it by 14.1%. Under both irrigation treatments, low and moderate root cutting strategies did not affect the take up of Cd by the plant roots, while severe cutting decreased it significantly. Enzyme activities decreased with the increment of pruning intensity, and magnetic field can alleviate the negative impact, increasing the capacity of the root pruned species to scavenge the excessive ROS induced by the accumulated Cd. The results showed that root pruning enhanced the phytoremediation efficiency of C. argentea, and this effect was enhanced when combined with magnetized water irrigation.
采用盆栽试验研究了磁化水灌溉（100 mT）和根系修剪（三种修剪强度）对鸡冠花植物修复效率的影响。在没有磁场处理的情况下，低强度根系修剪增加了鸡冠花地下和地上部分的干重。中度和重度修剪分别使植物根系的生物量产量降低了 11.3%和 31.0%，同时使地上部分的干重分别增加了 75.9%和 27.6%，从而减轻了这些修剪处理对植物根系的不利影响。在磁场处理的情况下，10%和 25%的修剪处理使植物根系的干重分别增加了 52.1%和 33.8%，而 33%的修剪处理使植物根系的干重减少了 14.1%。在两种灌溉处理下，低强度和中度根系修剪策略均不影响植物根系对 Cd 的吸收，而重度修剪则显著降低了 Cd 的吸收。酶活性随修剪强度的增加而降低，磁场可以减轻这种负面影响，增强根修剪物种清除由积累的 Cd 诱导的过量 ROS 的能力。结果表明，根系修剪增强了鸡冠花的植物修复效率，而与磁化水灌溉相结合时，这种效果会增强。
