| 肖建勇,刘月仙.微塑料与镉对白菜生长及生理特性的影响[J].农业环境科学学报,2025,44(11):2887-2898. |
| 微塑料与镉对白菜生长及生理特性的影响 |
| Effects of microplastics and cadmium on the growth and physiological characteristics of cabbage |
| 投稿时间：2024-12-10 |
| DOI：10.11654/jaes.2024-1081 |
| 中文关键词: 聚乙烯微塑料 镉 复合作用 盆栽实验 偏最小二乘路径模型 |
| 英文关键词: polyethylene microplastics cadmium combined effects pot experiment PLS-PM |
| 基金项目:国家重点研发计划项目（2024YFC3907901） |
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| 摘要点击次数: 1087 |
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| 中文摘要: |
| 为探究微塑料与镉（Cd）单一及复合作用对植物生长的影响，本实验以土壤中广泛分布的聚乙烯微塑料（PE-MPs）和日常典型蔬菜——白菜（Brassica campestris L.）为研究对象，通过室内盆栽实验，研究了不同浓度梯度PE-MPs（0.5%、2%、4%）与Cd（1mg·kg-1）单一及复合处理下白菜生长、生理指标及Cd吸收的差异。结果表明：PE-MPs与Cd处理均显著抑制了白菜的生长，单一Cd处理的毒性效应强于单一PE-MPs处理，PE-MPs仅在4%的高浓度处理下使白菜生物量显著降低，白菜叶绿素含量的变化也表现出类似的趋势，尤其是在高浓度（4%）时。低浓度（0.5%）PE-MPs在一定程度上缓解了Cd对白菜的氧化胁迫，但随着PE-MPs浓度的增加，这种缓解作用减弱，甚至加剧氧化损伤。中高浓度（2%与4%）PE-MPs与Cd复合处理组的丙二醛含量分别较对应的单一PE-MPs处理提高了60.53%和141.47%。此外，PE-MPs的添加显著降低了土壤有效态Cd含量，但未显著改变白菜对Cd的吸收。偏最小二乘路径模型模拟结果表明在单一PE-MPs处理的情况下，白菜品质主要受到PE-MPs添加的直接负向影响，而PE-MPs与Cd复合处理可以通过影响白菜Cd含量间接影响白菜品质。 |
| 英文摘要: |
| To investigate the effects of microplastics and cadmium（Cd） on plant growth under single and combined conditions, polyethylene microplastics（PE-MPs）, which are widely distributed in the soil environment, and cabbage（Brassica campestris L.）, a popular vegetable in daily life, were used in the pot experiment. Through indoor pot experiments, the differences in cabbage growth, physiological indicators, and Cd uptake under different concentration gradients of PE-MPs（0.5%, 2%, 4%）and Cd（1 mg·kg-1）in single and combined treatments were studied. The results showed that both PE-MPs and Cd treatments significantly inhibited the growth of cabbage, with the toxic effect of single Cd treatment being stronger than that of single PE-MPs treatment. PE-MPs only significantly reduced cabbage biomass at the high concentration of 4%, and a similar trend was observed in the changes of chlorophyll content, especially at the high concentration（4%）. Low concentration（0.5%）of PE-MPs alleviated the oxidative stress caused by Cd to some extent, but as the concentration of PE-MPs increased, this mitigating effect weakened and even turned into aggravated oxidative damage. The malondialdehyde（MDA）content in the medium and high concentration（2% and 4%）PE-MPs and Cd combined treatment groups increased by 60.53% and 141.47%, respectively, compared to the corresponding single PE-MPs treatments. Besides, the addition of PEMPs significantly reduced the content of available Cd in the soil but did not significantly alter the uptake of Cd by cabbage. The results of partial least squares path modeling（PLS-PM）indicated that under single PE-MPs treatment, the quality of cabbage was primarily directly and negatively affected by PE-MPs addition. In contrast, the combined treatment of PE-MPs and Cd indirectly influenced the quality of Chinese cabbage by affecting its Cd content. |
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