农业环境科学学报2025，Vol.44Issue(2)：298-309,12.DOI:10.11654/jaes.2024-0845
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.
摘要
Abstract
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.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Key words
polylactic acid microplastics/polypropylene microplastics/antioxidant enzyme activities/microelements分类
环境科学引用本文复制引用
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):298-309,12.基金项目
国家重点研发计划项目(2023YFC3207500) National Key Research and Development Program of China(2023YFC3207500) （2023YFC3207500）
