Impact of microplastics on growth, photosynthesis and essential elements in Cucurbita pepo L.

被引:216
作者
Colzi, Ilaria [1 ]
Renna, Luciana [1 ,2 ]
Bianchi, Elisabetta [3 ]
Castellani, Maria Beatrice [1 ]
Coppi, Andrea [1 ]
Pignattelli, Sara [4 ]
Loppi, Stefano [3 ]
Gonnelli, Cristina [1 ]
机构
[1] Univ Firenze, Dept Biol, Via Micheli 1, I-50121 Florence, Italy
[2] Univ Firenze, Dept Agr, Sesto Fiorentino, Viale Idee 30, I-50019 Florence, Italy
[3] Univ Siena, Dept Life Sci, Via Mattioli 3, I-53100 Siena, Italy
[4] Univ Nova Gorica, Lab Environm & Life Sci, Vipavska Cesta 13, SI-5000 Rozna Dolina, Nova Gorica, Slovenia
关键词
Microplastic toxicity; Leaf traits; Chlorophyll fluorescence; Ionome; Zucchini; SOIL; YIELD; ACCUMULATION; TOLERANCE; PLANTS; WASTE;
D O I
10.1016/j.jhazmat.2021.127238
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, Cucurbita pepo L., one of the most cultivated, consumed and economically important crop worldwide, was used as model plant to test the toxic effects of the four most abundant microplastics identified in contaminated soils, i.e. polypropylene (PP), polyethylene (PE), polyvinylchloride (PVC), and polyethyleneterephthalate (PET). Cucurbita plants were grown in pots with increasing concentrations of the microplastics, then plant biometry, photosynthetic parameters and ionome of treated vs. untreated samples were compared to evaluate the toxicity of each plastic. All the pollutants impaired root and, especially, shoot growth. Specific and concentration-dependant effects of the different microplastics were found, including reduction in leaf size, chlorophyll content and photosynthetic efficiency, as well as changes in the micro-and macro elemental profile. Among all the microplastics, PVC was identified as the most toxic and PE as the less toxic material. PVC decreased the dimensions of the leaf lamina, the values of the photosynthetic performance index and the plant iron concentration to a higher extent in respect to the other treatments. Microplastic toxicity exerted on the growth of C. pepo raises concerns about possible yield and economic loss, as well as for risks of a possible transfer into the food chain.
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页数:11
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