College of Environment and Resource, Center of Environmental Science and Engineering, Shanxi University, Taiyuan, Shanxi 030006, PR China.
Ecotoxicol Environ Saf. 2011 May;74(4):1050-6. doi: 10.1016/j.ecoenv.2011.01.023. Epub 2011 Feb 25.
With an increasing focus on the risk of pollution resulting from coking wastewater, it is important to check its toxic effects on organisms. For this reason, several physiological changes of Zea mays L. (maize) after exposure to coking wastewater were investigated in the present study, including growth, fresh biomass, mitotic index (MI), micronucleus (MCN) frequency, oxidative stress, and antioxidant capacity. The results show that coking wastewater affected the growth, fresh biomass and cell division, and induced obvious increase of MCN frequency in root tips. Moreover, coking wastewater elevated the levels of lipid peroxidation and protein oxidation in leaf tissues, accompanied by changes in heredity and antioxidant status. Also, the above-mentioned physiological responses varied as a function of sample concentration, and polluting risk was higher for the more concentrated samples, which contained higher level pollutants. It is therefore implicated that coking wastewater could cause toxic effects on organisms, and the possible mechanism involved is the generation of reactive oxygen species and subsequent injuries.
随着人们越来越关注焦化废水造成的污染风险，检查其对生物的毒性作用变得尤为重要。出于这个原因，本研究调查了焦化废水暴露后玉米（Zea mays L.）的几种生理变化，包括生长、鲜重生物量、有丝分裂指数（MI）、微核（MCN）频率、氧化应激和抗氧化能力。结果表明，焦化废水影响了玉米的生长、鲜重生物量和细胞分裂，并在根尖中诱导了明显的 MCN 频率增加。此外，焦化废水升高了叶片组织中的脂质过氧化和蛋白质氧化水平，伴随着遗传和抗氧化状态的变化。此外，上述生理反应随样品浓度的变化而变化，浓度较高的样品污染风险更高，因为其含有更高水平的污染物。因此，可以推测焦化废水可能对生物产生毒性作用，其涉及的可能机制是活性氧的产生和随后的损伤。
