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61,005 resultsShowing papers similar to Oxidative Stress, Phytochemical Screening, and Antioxidant Activity on Microalgae (Arthrospira platensis) After Exposure to Glyphosate and Microplastics
ClearCo-Exposure to Glyphosate and Polyethylene Microplastic Affects Their Toxicity to Chlorella vulgaris: Implications for Algal Health and Aquatic Risk
Researchers assessed the individual and combined toxicity of polyethylene microplastics and glyphosate to the microalga Chlorella vulgaris in acute and chronic exposures. The combination caused greater toxicity than either contaminant alone, particularly at chronic exposure durations, indicating synergistic effects relevant to agricultural runoff contamination.
Impacts of polyethylene microplastics on the microalga, Spirulina (Arthrospira platensis)
This study examined how polyethylene microplastics affect Spirulina, a widely cultivated blue-green algae used in food and supplements. Researchers found that at higher concentrations, microplastics reduced Spirulina growth and caused oxidative stress, while the algae also physically entangled with the plastic particles. The findings suggest that microplastic contamination could threaten both natural algal ecosystems and the commercial production of this important food source.
The combined toxicity influence of microplastics and nonylphenol on microalgae Chlorella pyrenoidosa
Researchers examined the combined toxicity of nonylphenol and several types of microplastics on the freshwater microalgae Chlorella pyrenoidosa. The study found that microplastics of different polymer types and sizes interacted with nonylphenol in complex ways, affecting algal growth, chlorophyll fluorescence, and antioxidant enzyme activity, demonstrating that co-exposure to microplastics and organic pollutants can produce combined toxic effects.
Micro/nano-plastics and microalgae in aquatic environment: Influence factor, interaction, and molecular mechanisms.
This review examined the interactions between micro/nanoplastics and microalgae in aquatic environments, summarizing how plastic particle size, surface chemistry, and co-pollutants influence algal toxicity through oxidative stress, photosynthesis inhibition, and gene expression changes.
Oxidative stress and energy metabolic response of Isochrysis galbana induced by different types of pristine and aging microplastics and their leachates
Researchers compared how different types of pristine and aged microplastics affect a marine microalga used in aquaculture. Aged microplastics were more toxic than fresh ones, and the chemical compounds they released into the water caused greater oxidative stress and energy disruption in algal cells. The study suggests that as microplastics weather in the environment, they may become more harmful to the base of the marine food chain.
Micro/nanoplastic-induced stress in microalgae: Latest laboratory evidence and knowledge gaps
This review compiled laboratory evidence on how micro- and nanoplastics stress microalgae — the base of aquatic food webs — covering effects on photosynthesis, growth, oxidative stress, and toxin production. The authors identify key knowledge gaps including environmentally realistic concentrations and combined contaminant effects.
The Effect of Polyethylene Microplastics on Growth and Antioxydant Response of Oscillatoria Princeps and Chlorella Pyrenoidosa
Researchers exposed two freshwater algae species to polyethylene microplastics of different sizes and found that the particles disrupted photosynthesis and altered antioxidant enzyme activity. Smaller microplastics generally caused more pronounced effects, and the two species responded differently to the stress. The findings suggest that microplastic pollution in freshwater environments could impair the growth of organisms at the base of aquatic food webs.
Impacts of microplastic–petroleum pollution on nutrient uptake, growth, and antioxidative activity of Chlorella vulgaris
Researchers examined the single and combined effects of polyethylene microplastics and petroleum on the microalga Chlorella vulgaris. Both pollutants individually and in combination caused oxidative stress, disrupted nutrient uptake of key elements like iron and silicon, and affected cell growth, with iron and manganese playing critical roles in nitrate absorption pathways.
The impact of polystyrene nanoplastics (PSNPs) on physiological and biochemical parameters of the microalgae Spirulina platensis
Researchers exposed the microalgae Spirulina platensis to polystyrene nanoplastics at three concentrations over 20 days and found dose-dependent reductions in growth rate, dry weight, and photosynthetic pigments alongside increased oxidative stress markers, indicating nanoplastics impair algal physiology even at relatively low exposure levels.
Multi‐Biomarkers' Responses in Gills of Oreochromis niloticus Exposed to Glyphosate and Polyethylene Microplastic, Isolated and in Mixture
Researchers exposed tilapia fish to polyethylene microplastics and the herbicide glyphosate, both alone and in combination, and examined gill tissue for signs of damage. They found that the mixture of both contaminants caused more severe oxidative stress and tissue damage than either pollutant alone. The study suggests that microplastics and agricultural chemicals may interact in waterways to amplify harmful effects on fish health.
Effects of microplastics and glyphosate on growth rate, morphological plasticity, photosynthesis, and oxidative stress in the aquatic species Salvinia cucullata
Researchers tested how polystyrene microplastics and the herbicide glyphosate, both alone and combined, affect the aquatic plant Salvinia cucullata. Glyphosate significantly reduced the plant's growth, photosynthesis, and root activity, while microplastics mainly impaired growth and root function without affecting photosynthesis directly. When combined at high concentrations, the two pollutants showed synergistic effects, suggesting their co-occurrence in waterways may be more harmful than either one alone.
Single and combined toxicity assessment of primary or UV-aged microplastics and adsorbed organic pollutants on microalga Chlorella pyrenoidosa
Researchers investigated the single and combined toxicity of polyamide microplastics with the pollutants sulfamethoxazole and dicamba on the green alga Chlorella pyrenoidosa. They found that UV-aged microplastics caused different toxic effects than pristine ones, and that microplastics altered the bioavailability and toxicity of the co-occurring pollutants. The study suggests that environmental aging of microplastics changes their interactions with other contaminants, potentially affecting aquatic organisms in complex ways.
Polyethylene microplastic modulates the toxicity of pentachlorophenol to the microalgae Isochrysis galbana, clone t-ISO
Researchers studied how polyethylene microplastics interact with the pesticide pentachlorophenol to affect the marine microalga Isochrysis galbana. They found that microplastics modulated the toxicity of the pesticide, with the combined exposure producing different effects on photosynthetic pigments and growth than either pollutant alone. The study highlights that microplastics can alter how other environmental contaminants affect marine organisms, complicating risk assessments.
Synergistic effects between microplastics and glyphosate on honey bee larvae
This study found that honey bee larvae exposed to microplastics combined with the herbicide glyphosate experienced worse developmental problems, higher oxidative stress, and stronger immune responses than those exposed to either pollutant alone. The combined exposure disrupted key detoxification and antioxidant genes in the developing bees. While focused on bees, this research highlights how microplastics can amplify the harm from other environmental chemicals, a pattern that likely applies to other organisms including humans.
Evaluating physiological responses of microalgae towards environmentally coexisting microplastics: A meta-analysis
A meta-analysis of 52 studies found that microplastics inhibit microalgal growth and photosynthesis and induce oxidative damage, though microalgae can recover over time. Cyanobacteria are more vulnerable than green algae, and the relative size of microplastics to algal cells governs the mechanism of impact, while aged versus pristine microplastics have opposite effects on extracellular polymeric substance and microcystin production.
Toxicity effects of microplastics and lead(II) ion co-exposure on Chlorella: Protein- and enzyme-level responses
Researchers examined the combined toxic effects of polyethylene and polypropylene microplastics with lead ions on the freshwater alga Chlorella, focusing on protein and enzyme-level responses. They found that co-exposure altered protein expression and enzymatic activity in ways that differed from single-pollutant exposure. The study highlights that microplastics and heavy metals can interact to produce complex biomolecular responses in aquatic organisms.
Molecular mechanism for combined toxicity of micro(nano)plastics and carbon nanofibers to freshwater microalgae Chlorella pyrenoidosa
Researchers tested how microplastics, nanoplastics, and carbon nanofibers affect freshwater algae individually and in combination, finding that the combined effects were significantly worse than either pollutant alone. Nanoplastics combined with carbon nanofibers caused the most severe cellular stress, damaging cell membranes, increasing oxidative stress, and disrupting energy metabolism. Since algae form the base of aquatic food chains, this damage could cascade through ecosystems and affect the safety of water and seafood for humans.
Toxic Effects of Microplastics on Culture Scenedesmus quadricauda: Interactions between Microplastics and Algae
Researchers found that microplastics from multiple polymer types inhibit growth of the freshwater alga Scenedesmus quadricauda and induce oxidative stress, with toxicity varying by polymer type, particle size, and concentration.
Enhanced microalgal toxicity due to polystyrene nanoplastics and cadmium co-exposure: From the perspective of physiological and metabolomic profiles
Researchers studied the combined toxicity of polystyrene nanoplastics and cadmium on the microalga Euglena gracilis and found that co-exposure produced synergistic effects, inhibiting growth by nearly 29%. The organisms activated antioxidant defenses and showed significant disruptions in carbohydrate, lipid, and amino acid metabolism. The findings suggest that nanoplastics and heavy metals together pose greater risks to aquatic microorganisms than either pollutant alone.
Exploring biochemical responses and cellular adaptations of Chlorella sorokiniana to polyethylene microplastic exposure
Researchers exposed the freshwater microalgae Chlorella sorokiniana to varying concentrations of polyethylene microplastics and measured the effects on growth, pigments, and biochemical composition. They found that high concentrations inhibited growth by 50% and caused reductions in pigments, lipids, and carbohydrates, while protein content increased as a stress response. The study provides insights into how microplastic pollution may disrupt the base of freshwater food webs by affecting primary producers.
Adverse effects of microplastics on the growth, photosynthesis, and astaxanthin synthesis of Haematococcus pluvialis
Researchers exposed the microalga Haematococcus pluvialis to polystyrene microplastics and found that while short-term contact briefly stimulated growth, longer exposure inhibited photosynthesis, caused oxidative stress, and impaired the organism's ability to produce astaxanthin, a valuable natural antioxidant. The findings highlight how microplastic pollution could disrupt both aquatic ecosystems and the commercial production of beneficial compounds from algae.
Ecotoxicological impact of virgin and environmental microplastics leachate on Chlorella vulgaris: Synergistic microbial-pollutant drivers cripple photosynthesis
Researchers compared the toxic effects of leachate from new versus environmentally weathered microplastics on a common green algae species. They found that weathered microplastics were up to 3.4 times more toxic, severely disrupting photosynthesis and introducing hundreds of bacterial species and pollutants that compounded the damage. The findings highlight that microplastics become significantly more dangerous as they age in the environment.
Aged polyethylene microplastics modulate herbicide and antibiotic bioavailability and plant responses: a case study with glyphosate and tetracycline
Researchers generated experimental data on how aged polyethylene microplastics affect the behavior of the herbicide glyphosate and the antibiotic tetracycline in hydroponic plant growth systems. The dataset includes measurements of pollutant sorption, plant photosynthetic pigments, and antioxidant enzyme activity in rapeseed plants exposed to various combinations of microplastics and chemicals. The study suggests that microplastics can modulate how other environmental contaminants interact with plants.
Effect and mechanism of microplastics exposure against microalgae: Photosynthesis and oxidative stress
Meta-analysis of 55 studies (835 endpoints) found that microplastics reduce chlorophyll-a content and hinder electron transfer in microalgae photosynthetic systems, causing oxidative stress damage. Effects were concentration- and size-dependent, with freshwater microalgae more susceptible than marine species.