Li Guangke, Niu Jing, Sang Nan
College of Environment and Resource, Center of Environmental Science and Engineering, Shanxi University, Taiyuan, Shanxi 030006, PR China.
Chemosphere. 2008 Dec;74(1):106-11. doi: 10.1016/j.chemosphere.2008.09.010. Epub 2008 Oct 23.
With increasing attention paid to the recycling use of aged refuse as vegetated soil, it is important to check its possible polluting risk and probe the tolerance of plant system to its stress. For this reason, several physiological responses in Zea mays L. (maize) to the leaching samples of aged refuse in different particle-size (900-300, 300-150, 150-105, 105-90, and 90-0 microm) were investigated in the present study, including growth, lipid peroxidation, protein oxidation and activities of antioxidant enzymes. The results indicate that the aged refuse affected the growth of maize seedlings, and elevated the levels of lipid peroxidation and protein oxidation in leaf tissues in a time-dependent manner, accompanying by the changes of antioxidant status. Also, above physiological responses varied as a function of particle-size distribution of the aged refuse, and statistical growth inhibition and oxidative stress occurred after the exposure of smaller particle-size samples, which contained higher level trace metals, the characteristic pollutants in the aged refuse. The results implicate that aged refuse might cause environmental stress on plant system, but the polluting risk mainly resulted from smaller particle-size samples. Therefore, the critical point of utilizing aged refuse as vegetated soil focused on analyzing its particle-size distribution, and screening out appropriate particle-size samples.
随着对将老化垃圾作为植被土壤进行循环利用的关注度不断提高，检查其可能的污染风险并探究植物系统对其胁迫的耐受性变得至关重要。因此，本研究考察了玉米（Zea mays L.）对不同粒径（900 - 300、300 - 150、150 - 105、105 - 90和90 - 0微米）老化垃圾浸出样品的几种生理反应，包括生长、脂质过氧化、蛋白质氧化和抗氧化酶活性。结果表明，老化垃圾影响了玉米幼苗的生长，并随时间推移以时间依赖性方式提高了叶片组织中脂质过氧化和蛋白质氧化的水平，同时伴随着抗氧化状态的变化。此外，上述生理反应随老化垃圾粒径分布的变化而变化，在暴露于含有较高水平痕量金属（老化垃圾中的特征污染物）的较小粒径样品后，出现了统计学上的生长抑制和氧化应激。结果表明，老化垃圾可能会对植物系统造成环境胁迫，但污染风险主要来自较小粒径的样品。因此，将老化垃圾用作植被土壤的关键点在于分析其粒径分布，并筛选出合适粒径的样品。
