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20 resultsShowing papers similar to Mechanistic insights into the size-dependent bioaccumulation and phytotoxicity of polyethylene microplastics in tomato seedlings
ClearMicroplastic accumulation and oxidative stress in sweet pepper (Capsicum annuum Linn.): Role of the size effect
Researchers grew sweet peppers in soil containing microplastics of two different sizes and found that smaller particles were taken up and accumulated in the plant roots and stems more readily than larger ones. The microplastics triggered oxidative stress in the plants, with smaller particles causing more damage to the plants' cellular defense systems. This study shows that microplastics in agricultural soil can enter food crops, with smaller particles posing the greatest risk to both plant health and food safety.
The dosage- and size-dependent effects of micro- and nanoplastics in lettuce roots and leaves at the growth, photosynthetic, and metabolomics levels
Researchers studied the effects of polyethylene micro- and nanoplastics on lettuce plants, varying both particle size and concentration. They found that particle size played a pivotal role in influencing plant growth, photosynthetic activity, and metabolic processes, with nanoplastics generally causing more pronounced effects than larger microplastics. The study suggests that the smallest plastic particles pose the greatest risk to crop health by disrupting plant physiology at multiple levels.
Unraveling the impact of nano-microscale polyethylene and polypropylene plastics on Nicotiana tabacum: Physiological responses and molecular mechanisms
Researchers exposed tobacco plants to polyethylene and polypropylene microplastics of different sizes and found that both types suppressed plant growth in a dose-dependent manner, with polypropylene being more toxic. The microplastics disrupted photosynthesis, triggered oxidative stress, and altered hormone signaling and defense pathways in the plants. These findings demonstrate that microplastic contamination in soil can impair crop growth at the molecular level, potentially affecting agricultural productivity.
The multifaceted mechanisms of microplastic inhibition of tomato plant growth: oxidative toxicity, metabolic perturbation, and photosynthetic damage
Researchers exposed tomato seedlings to biodegradable and conventional microplastics and investigated photosynthetic performance, metabolic disruption, and oxidative stress responses. Both microplastic types inhibited tomato growth and caused oxidative damage, with impacts on the photosynthetic apparatus and metabolite profiles, challenging the assumption that biodegradable plastics are safer for agricultural systems.
Particle size-dependent biomolecular footprints of interactive microplastics in maize
Researchers tested how five common types of microplastics at different particle sizes affect maize seedlings at the molecular and physiological level. The study found that smaller microplastic particles (75-150 micrometers) caused more cellular damage than larger ones, disrupting cell membranes, reducing photosynthetic pigments, and triggering stress responses. Mixtures of multiple plastic types were especially harmful, suggesting that real-world combinations of microplastic pollution may pose greater risks to crops than individual plastic types.
Mechanistic insights into the effects of micro- and nano-plastics on cherry radish physiology and organic compound distribution at the soil-root interface.
Researchers exposed cherry radish to polyethylene microplastics (2 µm) and nanoplastics (200 nm) at varying concentrations and measured effects on plant physiology and organic compound distribution at the soil-root interface. Smaller nanoplastic particles caused greater disruption to root exudate chemistry and plant metabolism than the larger microplastics, pointing to a size-dependent toxicity mechanism.
Impact of microplastics on plant physiology: A meta-analysis of dose, particle size, and crop type interactions in agricultural ecosystems
This meta-analysis of 37 studies found that microplastics significantly decrease plant biomass by 13% and chlorophyll content by 28%, while increasing oxidative stress by 20%. Higher doses and smaller particle sizes caused more damage, with particle size having a greater impact than concentration — and root activity was particularly sensitive to microplastic exposure.
Effects of polyethylene microplastics with different particle sizes on photosynthesis，biomass and root characteristics of maize seedlings
Researchers tested two sizes of polyethylene microplastics (13 μm and 150 μm) on maize seedlings in soil pot experiments and found size-dependent effects on photosynthesis, biomass, and root characteristics, with smaller particles generally causing greater physiological disruption.
MICROPLÁSTICOS Y NANOPLÁSTICOS: UNA REVISIÓN SISTEMÁTICA DE SU IMPACTO EN EL CRECIMIENTO DE TOMATE (Solanum lycopersicum)
This systematic review analysed published studies on the effects of synthetic microplastics and nanoplastics on tomato (Solanum lycopersicum) growth, examining how polymer type, particle size, concentration, and growth medium modulate phytotoxicity. The review found that MP and NP exposure consistently impaired biomass accumulation, plant height, flower and fruit production, and root and shoot length, with higher concentrations and smaller particle sizes generally producing the most pronounced negative effects.
Occurrence and distribution of micro/nanoplastics in soils and their phytotoxic effects: A review
This review examined how micro- and nanoplastics distribute across different soil types and get taken up by plant roots, finding that smaller, spherical particles are absorbed more easily. Researchers found that these plastic particles accumulate in plants and trigger oxidative stress, which disrupts gene expression and metabolic pathways important for plant growth and biomass production.
Uptake and ecotoxicity of microplastics of different particle sizes in crop species
Researchers exposed seedlings of three crop species to small (0.2 µm) and large (1.0 µm) polystyrene beads and found that particle size did not affect fresh weight, but smaller particles caused significantly greater root length inhibition in cucumber compared to bean and sorghum.
Phytotoxicity of polystyrene, polyethylene and polypropylene microplastics on tomato (Lycopersicon esculentum L.)
Researchers tested the effects of polystyrene, polyethylene, and polypropylene microplastics on tomato plant growth using hydroponic experiments at various concentrations. The study found that all three types of microplastics negatively affected seed germination, root growth, and plant development, with effects varying by plastic type and concentration. These findings suggest that microplastic contamination in agricultural settings could interfere with crop growth and food production.
Effects of polystyrene nanoplastics on tomato plant growth, fruit yield and quality
Researchers investigated how polystyrene nanoplastics affect tomato plant growth and fruit quality, finding that exposure reduced seedling biomass, impaired photosynthesis, and triggered oxidative stress. At higher concentrations, the nanoplastics inhibited mineral uptake and diminished fruit yield along with nutritional quality markers like vitamin C and lycopene. The study highlights that nanoplastic contamination in agricultural soils could pose a meaningful threat to food crop productivity and nutritional value.
Unveiling the mechanism of micro-and-nano plastic phytotoxicity on terrestrial plants: A comprehensive review of omics approaches.
This comprehensive review examined how micro-and-nano plastics (MNPs) in terrestrial soils damage plant health by inhibiting water and nutrient uptake, reducing seed germination, impairing photosynthesis, and inducing oxidative stress. The review identified key knowledge gaps in understanding MNP phytotoxicity mechanisms and their implications for food security.
Risks of microplastics on germination and growth of pepper (Capsicum annuum L.) depending on the type, concentration, and particle size
Researchers tested how different types, concentrations, and sizes of microplastics affect pepper seed germination and seedling growth. They found that most microplastic treatments inhibited germination and that polyethylene terephthalate (PET) particles were generally the most harmful to seedling development. The study also revealed that larger microplastic particles tended to cause more oxidative stress in the plants, suggesting particle size plays an important role in toxicity.
Micro (nano) plastics uptake, toxicity and detoxification in plants: Challenges and prospects
This review examines how micro and nanoplastics are taken up by plants, covering their toxic effects on growth and gene expression as well as potential detoxification strategies. Smaller nanoplastics can penetrate plant cell walls and accumulate in tissues, causing oxidative stress and genetic damage. The findings are important for human health because contaminated crops could transfer microplastics directly into the food supply.
Micro and nanoplastics pollution: Sources, distribution, uptake in plants, toxicological effects, and innovative remediation strategies for environmental sustainability
This review examines how microplastics and nanoplastics enter plants through roots, disrupt growth and photosynthesis, and cause oxidative stress that reduces crop yields. Because these plastic particles can move through plant tissues and into edible parts, they represent a potential pathway for microplastics to enter the human food supply.
The varied effects of different microplastics on stem development and carbon-nitrogen metabolism in tomato
Researchers tested how six different types of microplastics, including both conventional and biodegradable varieties, affect tomato plant growth. All types disrupted the plants' internal structure and altered how they processed carbon and nitrogen, with PVC causing the most severe damage. Notably, biodegradable plastics like PLA and PBS were not harmless either, suggesting that switching to so-called eco-friendly plastics may not fully protect agricultural soil and food crops from microplastic contamination.
Microplastic/nanoplastic toxicity in plants: an imminent concern
This review examines the growing body of research on how microplastics and nanoplastics affect terrestrial plants, from root uptake to changes in growth and gene expression. Researchers found that these particles can alter plant physiology and biochemistry at varying degrees depending on particle size and concentration. The study calls for more research on how plastic contamination in soil may ultimately affect food crop quality and human health through the food chain.
Presence of High-Density Polyethylene Nanoplastics (HDPE-NPs) in Soil Can Influence the Growth Parameters of Tomato Plants (Solanum lycopersicum L.) at Various Stages of Development
Researchers grew tomato plants in soil spiked with high-density polyethylene nanoplastics at environmentally relevant concentrations, finding that the nanoplastics slowed germination, reduced root and shoot growth, and affected plant physiology at multiple developmental stages. Effects were dose-dependent and more pronounced at higher nanoplastic concentrations. As nanoplastics are now detected in agricultural soils through biosolid application and irrigation, this study raises concerns about the impact of nano-sized plastic contamination on food crop yields.