Microplastics Reduce the Negative Effects of Litter-Derived Plant Secondary Metabolites on Nematodes in Soil

Kim, Shin Woong; Liang, Yun; Lozano, Yudi M.; Rillig, Matthias C.

doi:10.3389/fenvs.2021.790560

Cited by 14 publications

(3 citation statements)

References 51 publications

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“…Soil organisms also play essential ecological roles in the decomposition process, such as nematodes, which can ingest litter fragments and break them down into simple inorganic substances. However, the plant secondary metabolites derived from litter influenced by MNP may have potentially negative effects on soil nematodes, inhibiting their decomposition of litter [81].…”

Section: The Impact Of Mnp On the Decomposition Of Plant Littermentioning

confidence: 99%

Impacts of Micro(nano)plastics on Terrestrial Plants: Germination, Growth, and Litter

Li,

Wang,

Dai

et al. 2023

Plants

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Micro(nano)plastics (MNP) are pervasive in various environmental media and pose a global environmental pollution issue, particularly in terrestrial ecosystems, where they exert a significant impact on plant growth and development. This paper builds upon prior research to analyze and consolidate the effects of MNP on soil properties, seed germination, plant growth, and litter decomposition. The objective is to elucidate the environmental behavior of MNP and their mechanisms of influence on the plant life cycle. The unique physicochemical and electrical properties of MNP enable them to modify soil structure, water retention capacity, and pH. They can potentially act as “electron shuttles” or disrupt natural “electron shuttles” in litter decomposition, thereby interfering with nutrient transport and availability in the soil. Furthermore, MNP can physically obstruct nutrient and water channels within plants, impacting nutrient and water absorption. Once infiltrating plant tissues, MNP can form eco-coronas with plant proteins. Together with MNP adsorbed on the plant’s surface and within its tissues, they disrupt normal physiological processes, leading to changes in photosynthesis, biomass, cellular toxicity, genetics, nutrient uptake, and gene expression. These changes, in turn, influence seed germination and plant growth and development. As a burgeoning research field, future studies should delve deeper into various aspects of these changes, such as elucidating the pathways and mechanisms through which MNP enter plant tissues, assessing their intensity and mechanisms of toxicity on different plant species, and exploring the relationship between micro(nano)plastics and “electron shuttles”. These endeavors will contribute to establishing a more comprehensive theoretical framework for understanding the environmental behavior of MNP and their impact on plants.

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Section: The Impact Of Mnp On the Decomposition Of Plant Littermentioning

confidence: 99%

Impacts of Micro(nano)plastics on Terrestrial Plants: Germination, Growth, and Litter

Li,

Wang,

Dai

et al. 2023

Plants

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“…While some animal SMs originate internally, most are diet-derived, often through plant consumption . Ingested SMs, whether directly or via MPs following adsorption, can influence metabolic rates, nutrient digestibility, and energy expenditure based on type and quantity . Moreover, animals exploit SMs as a strategy to counter challenges that disturb homeostasis due to their bioactive attributes, like antioxidants countering oxidative damage .…”

Section: Discussionmentioning

confidence: 99%

Pearl Farming Micro-Nanoplastics Affect Oyster Physiology and Pearl Quality

Gardon,

Le Luyer,

Le Moullac

et al. 2023

Environ. Sci. Technol.

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Pearl farming is crucial for the economy of French Polynesia. However, rearing structures contribute significantly to plastic waste, and the widespread contamination of pearl farming lagoons by microplastics has raised concerns about risks to the pearl industry. This study aimed to evaluate the effects of micronanoplastics (MNPs, 0.4−200 μm) on the pearl oyster (Pinctada margaritifera) over a 5-month pearl production cycle by closely mimicking ecological scenarios. MNPs were produced from weathered plastic pearl farming gear and tested at environmentally relevant concentrations (0.025 and 1 μg L −1 ) to decipher biological and functional responses through integrative approaches. The significant findings highlighted the impacts of MNPs on oyster physiology and pearl quality, even at remarkably low concentrations. Exposure to MNPs induced changes in energy metabolism, predominantly driven by reduced assimilation efficiency of microalgae, leading to an alteration in gene expression patterns. A distinct gene expression module exhibited a strong correlation with physiological parameters affected by MNP conditions, identifying key genes as potential environmental indicators of nutritional-MNP stress in cultured oysters. The alteration in pearl biomineralization, evidenced by thinner aragonite crystals and the presence of abnormal biomineral concretions, known as keshi pearls, raises concerns about the potential long-term impact on the Polynesian pearl industry.

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“…Due to the large MP size, nematodes could not ingest them and negligible effects were assessed on both C. elegans and V. fischeri endpoints, unless the concentration of simazine increased to 15 Kiyama et al [188] also suggested that C. elegans could discriminate plastics based on size. A different approach established that MPs could reduce the negative impacts on the nematode C. elegans of toxic compounds present in plant litter because MPs could effectively retain the toxic phenolic compounds [189]. Furthermore, Lei et al [190] showed that the effect of MPs on C. elegans was size-dependent, by comparing PS at 100-500 nm and 1-5 µm.…”

Section: Terrestrial Ecosystemsmentioning

confidence: 99%

Interactions of Microplastics with Pesticides in Soils and Their Ecotoxicological Implications

2023

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In the middle of the 20th century, the production of plastics exploded worldwide because of their low cost and the versatility of their applications. However, since plastic debris is highly resistant to environmental degradation, a growing presence of plastics in all the ecosystems has been confirmed. Among them, plastic particles < 5 mm, also known as microplastics (MPs), are of special concern because they are dispersed in aerial, terrestrial and aquatic environments, being the soil the main environmental sink of these contaminants. Due to their large specific surface area and hydrophobicity, MPs are considered good adsorbents for other environmental organic pollutants also present in terrestrial ecosystems, such as pharmaceuticals, personal-care products or pesticides with which they can interact and thus modify their environmental fate. In this review article, we examine the recent literature (from 2017 to 2022) to get a better understanding of the environmental fate of pesticides in soil (adsorption, mobility and/or degradation) when they are simultaneously present with MPs and the ecological risks on living organisms of the interactions between MPs and pesticides in soil. More studies are needed to fully understand the toxicological impact of the copresence in soil of pesticides and MPs.

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Microplastics Reduce the Negative Effects of Litter-Derived Plant Secondary Metabolites on Nematodes in Soil

Cited by 14 publications

References 51 publications

Impacts of Micro(nano)plastics on Terrestrial Plants: Germination, Growth, and Litter

Impacts of Micro(nano)plastics on Terrestrial Plants: Germination, Growth, and Litter

Pearl Farming Micro-Nanoplastics Affect Oyster Physiology and Pearl Quality

Interactions of Microplastics with Pesticides in Soils and Their Ecotoxicological Implications

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