| 蒋雷,姜翠玲,孙磊,冯亚坤,陆灿,樊泽群,袁梦琳.聚丙烯和聚乳酸微塑料对小油菜生理生化的影响[J].农业环境科学学报,2025,44(2):298-309. |
| 聚丙烯和聚乳酸微塑料对小油菜生理生化的影响 |
| Effects of polypropylene and polylactic acid microplastics on the physiology and biochemistry of Brassica chinensis L. |
| 投稿时间：2024-10-08 |
| DOI：10.11654/jaes.2024-0845 |
| 中文关键词: 聚乳酸微塑料 聚丙烯微塑料 抗氧化酶活性 微量元素 |
| 英文关键词: polylactic acid microplastics polypropylene microplastics antioxidant enzyme activities microelements |
| 基金项目:国家重点研发计划项目（2023YFC3207500） |
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| 中文摘要: |
| 为探讨可生物降解微塑料（BMPs）与不可生物降解微塑料（NBMPs）对农作物的影响，采用水培实验，选用不可生物降解聚丙烯微塑料（PP-MPs）以及可生物降解聚乳酸微塑料（PLA-MPs），研究两种微塑料（MPs）在不同浓度下（1、10、50 mg·L-1和 100mg·L-1）对小油菜生物量、叶绿素、抗氧化性以及营养元素吸收的影响，并基于偏最小二乘法-结构方程模型（PLS-SEM）分析各因素间的作用关系。结果表明：PP-MPs和PLA-MPs在高浓度（100 mg·L-1）下均阻碍小油菜叶绿素的合成，但PLA-MPs对叶绿素b合成的抑制速率是PP-MPs的4.17倍（最大降幅达16.59%）。PLA-MPs能使超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）活性以及丙二醛（MDA）含量显著升高，且升高速率高于 PP-MPs，最大增幅分别为 358.38%、545.68%、657.87% 以及147.47%。两种 MPs均干扰小油菜对镁（Mg）和铜（Cu）元素的吸收，进而影响小油菜的生长发育。研究表明，在高浓度（100 mg·L-1）下，相比PP-MPs，PLA-MPs对小油菜的生长抑制作用更强。 |
| 英文摘要: |
| To investigate the effects of biodegradable microplastics（BMPs）and non-biodegradable microplastics（NBMPs）on crops, the non-biodegradable polypropylene microplastics（PP-MPs）and biodegradable polylactic acid microplastics（PLA-MPs）were selected in hydroponics experiment. The effects of two kinds of microplastics（MPs）at different concentrations（1, 10, 50 mg·L-1 and 100 mg·L-1）on biomass, chlorophyll, antioxidant capacity and nutrient absorption of Brassica chinensis L. were investigated. Furthermore, the relationships among these factors were analyzed using the partial least squares method-structural equation model（PLS-SEM）. The results showed that both PP-MPs and PLA-MPs inhibited the synthesis of chlorophyll in Brassica chinensis L. at high concentration（100 mg·L-1）, however, the inhibition rate of PLA-MPs on chlorophyll b synthesis was 4.17 times greater than that of PP-MPs（with the maximum decrease being 16.59%）. The levels of superoxide dismutase（SOD）, catalase（CAT）, peroxidase（POD）activity and malondialdehyde（MDA）were significantly increased by PLA-MPs, and the increasing rates were higher than those of PP-MPs, with the maximum increases of 358.38%, 545.68%, 657.87% and 147.47%, respectively. Both types of MPs interfere with the absorption of magnesium（Mg）and copper（Cu）in Brassica chinensis L., thereby adversely affecting its growth and development. The study demonstrated that PLA-MPs exerted a stronger inhibitory effect on growth of Brassica chinensis L. at high concentrations（100 mg·L-1）compared to PP-MPs. |
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