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Effects of Microplastics on Higher Plants: A Review
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This review examines how microplastics affect higher plants, covering impacts on seed germination, root growth, photosynthesis, and nutrient uptake, while highlighting the role of plastic type, size, and concentration in determining phytotoxicity.
Microplastics pose great risks to terrestrial systems owing to their large quantity and strong persistence. Higher plants, an irreplaceable part of the terrestrial ecosystem, are inevitably exposed to microplastics. This review highlights the effects of microplastics on higher plant growth and performance. The tested microplastics, plant species, and cultural methods used in existing studies were summarized. We discussed the reasons why these microplastics, plants, and methods were selected. The various responses of higher plants to microplastics in both soils and waters were critically reviewed. We also highlighted the influencing mechanisms of microplastics on higher plants. Conclusively, more than 13 types of common microplastics and more than 30 species of higher plants have been selected and studied by the published literatures. Soil culture tests and hydroponic experiments are almost equally divided. The effects of microplastics on higher plants varied among microplastic properties, plant species, and environmental factors. Microplastics had no or positive effects on higher plants under certain experimental conditions. However, more studies showed that microplastics can inhibit higher plant growth and performance. We reduced the inhibitory mechanisms into direct and indirect mechanisms. The direct mechanisms include blocking pores or light, causing mechanical damage to roots, hindering genes expression, and releasing additives. The indirect mechanisms contain changing soil properties, affecting soil microbes or soil animals, and affecting bioavailability of other pollutants. This review improves the understanding of effects and influencing mechanisms of microplastics on higher plants.
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This review summarized studies on the effects of microplastics on the germination and growth of terrestrial plants, finding generally negative effects at high concentrations including reduced germination rates and root length. Effects varied by plant species, polymer type, and particle size, and the review highlighted limited data from realistic field exposures.
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This review examines how microplastics affect agricultural crops, covering impacts on seed germination, root growth, photosynthesis, and overall plant health. Most studies focused on polystyrene and polyethylene under controlled lab conditions, and the effects varied widely depending on plastic type, size, and concentration. The authors stress that more field-based research is needed to understand how microplastics actually behave in real farming environments.
Microplastics on the growth of plants and seed germination in aquatic and terrestrial ecosystems
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This review examined the effects of microplastics on plant growth and seed germination in aquatic and terrestrial ecosystems, finding that microplastic presence can affect plant development through multiple mechanisms depending on polymer type, concentration, and the composition of the growing medium.
Recent advances on microplastics/nanoplastics interaction with plant species: A concise review
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This review synthesizes research on how microplastics and nanoplastics interact with plants, finding that plastic particles in soil can interfere with root uptake, germination, and crop yields depending on the type and concentration of plastic present. The findings are particularly relevant to human health because food crops grown in microplastic-contaminated agricultural soils may absorb or accumulate plastic particles, creating a direct dietary exposure route.
Micro- and nanoplastics in terrestrial plants: uptake, accumulation, and impacts on growth and physiology
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Tiny plastic particles from broken-down waste are building up in soil and getting absorbed by plants through their roots and leaves, according to this review of existing research. Once inside, these particles can stunt seed sprouting, weaken root growth, and interfere with photosynthesis (how plants make energy from sunlight), which matters because these are the same crops we eat. Since the plastic can travel from soil into plant tissue, this raises questions about how much may be passing into our food supply and, ultimately, into us.
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