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| Effects of microplastics on wheat seed germination and seedling growth |
| Received:July 22, 2018 |
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| KeyWord:microplastic;wheat (Triticum aestivum L.);seed germination;growth properties |
| Author Name | Affiliation | E-mail | | LIAN Jia-pan | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education/Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | | | SHEN Mei-mei | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education/Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | | | LIU Wei-tao | Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education/Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China | lwt@nankai.edu.cn |
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| Abstract: |
| To explore the effects of microplastics on seed germination and seedling growth of wheat (Triticum aestivum L.), three widely detected microplastics in agroecosystems Ethylene-vinyl acetate compolymer (EVA), Linear low-density polyethylene (LLDPE) and Poly (methyl methacrylate) (PMMA) were investigated by seed germination experiments. The results showed that all microplastics inhibited wheat seed germination at low and medium concentrations (<500 mg·L-1) with inhibition rates ranging from 2.86% to 20%. At high concentrations (1000 mg·L-1), the microplastics substantially promoted germination compared with that of the control group.In particular, the inhibitory effect of microplastics on wheat seed vigor index decreased in the following order:LLDPE > EVA > PMMA. The mean germination time of wheat seeds exposed to EVA and LLDPE at low and medium concentrations was higher than that at high concentration, and PMMA had no significant effect on wheat seed growth aspects. Overall, microplastics had no significant effect on wheat seedling length, root length and dry weight, but LLDPE significantly inhibited wheat bud length at 10 mg·L-1 concentration. |
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