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61,005 resultsShowing papers similar to Characterization of cell responses in Rhodomonas baltica exposed to PMMA nanoplastics
ClearPolystyrene nanoplastics cause growth inhibition, morphological damage and physiological disturbance in the marine microalga Platymonas helgolandica
Researchers exposed marine green microalgae to polystyrene nanoplastics and found significant growth inhibition, increased membrane permeability, disrupted photosynthesis, and visible morphological damage — including surface fragmentation and cellular rupture — at concentrations as low as 200 µg/L.
Impact of Nanoplastics on the Functional Profile of Microalgae Species Used as Food Supplements: Insights from Comparative In Vitro and Ex Vivo Digestion Studies
Researchers assessed how polystyrene and polyethylene nanoplastics affect microalgae species used as food supplements, both before and after simulated digestion. The study found that nanoplastics persisted through the digestion process, altered particle behavior in the microalgae medium, and significantly increased total phenolic content, raising concerns about food safety when plastic contamination occurs.
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.
Elucidating the cellular adaptive response of Coccomyxa sp. upon exposure to PVC-nanoplastics (PVC-NPs) for production of bioenergy molecules
Researchers studied how the microalga Coccomyxa sp. responds at the cellular level to exposure to PVC nanoplastics. The study aimed to elucidate the mechanisms of nanoplastic interactions with microalgae, which has significant ecological implications for understanding how plastic pollution affects primary producers in aquatic food webs.
Influence of microplastics on the toxicity of chlorpyrifos and mercury on the marine microalgae Rhodomonas lens
Researchers examined how polyethylene microplastics influence the toxicity of chlorpyrifos and mercury to the marine microalga Rhodomonas lens, finding that microplastics can modify pollutant bioavailability and alter toxic effects depending on particle surface oxidation state.
Nanoplastics reshape lipid metabolism in marine microalgae with potential ecological consequence
Researchers exposed a marine microalga important to ocean ecosystems to nanoplastics and found significant disruptions to its lipid metabolism, reducing both biomass and lipid production. The nanoplastics altered the types of fats the algae produced, potentially affecting the nutritional value of these organisms for the marine food web. The findings suggest that nanoplastic pollution could have cascading ecological consequences by disrupting carbon cycling at the base of the food chain.
Ecotoxicity of micro- and nanoplastics on aquatic algae: Facts, challenges, and future opportunities
This review provides a comprehensive assessment of how micro- and nanoplastics harm aquatic algae, which form the base of ocean and freshwater food chains. The toxic effects include reduced growth, oxidative stress, and disrupted photosynthesis, with nanoplastics generally causing more damage than larger particles. Since algae support the entire aquatic food web, their decline from plastic pollution could reduce the quality and safety of fish and shellfish consumed by people.
Effects of nanoplastics on microalgae and their trophic transfer along the food chain: recent advances and perspectives
This review summarized evidence on how nanoplastics affect microalgae — including growth inhibition, oxidative stress, and altered photosynthesis — and examined trophic transfer of nanoplastics up the food chain, finding that toxicity depended on NP concentration, size, and surface charge.
The Growth Inhibition of Polyethylene Nanoplastics on the Bait-Microalgae Isochrysis galbana Based on the Transcriptome Analysis
Researchers found that polyethylene nanoplastics (50 nm) significantly inhibited growth and reduced chlorophyll in the bait microalga Isochrysis galbana through oxidative stress and disrupted gene expression, while larger microplastics had no significant impact.
The effect of microplastics pollution in microalgal biomass production: A biochemical study
Scientists exposed the marine microalga Phaeodactylum tricornutum to polystyrene microplastics and found that both short- and long-term exposure at environmentally relevant concentrations disrupted biochemical composition including proteins, carbohydrates, and lipids.
Concentration dependent toxicity of microplastics to marine microalgae
Researchers exposed the marine microalga Chlorella sp. to polystyrene microplastics at concentrations of 10 and 50 mg/L, finding that even low concentrations inhibited growth and disrupted photosynthesis, while higher concentrations caused more pronounced oxidative stress.
The effects and mechanisms of polystyrene and polymethyl methacrylate with different sizes and concentrations on Gymnodinium aeruginosum
Researchers exposed the microalga Gymnodinium aeruginosum to polystyrene and polymethyl methacrylate microplastics of different sizes and concentrations, finding that smaller particles and higher concentrations caused greater oxidative stress and growth inhibition. The study revealed that microplastics can physically adhere to and damage algal cell membranes, disrupting cellular structure and function.
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.
The effects of nanoplastics on marine plankton: A case study with polymethylmethacrylate
Researchers tested polymethylmethacrylate nanoplastics against four marine microalgae species and a marine rotifer, finding median effect concentrations between 84 and 133 mg/L for algae and a 48-hour lethal concentration of 13.3 mg/L for rotifers, with species sensitivity distribution analysis suggesting PMMA nanoplastics are less harmful to marine biota than polystyrene.
Persistence of algal toxicity induced by polystyrene nanoplastics at environmentally relevant concentrations
Researchers studied whether the harmful effects of polystyrene nanoplastics on marine algae are temporary or long-lasting. They found that while some damage, like oxidative stress, was reversible after exposure ended, other effects such as increased cell membrane damage persisted. The study suggests that even at low, environmentally realistic concentrations, nanoplastics can cause lasting disruption to algal metabolism and cell function.
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.
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.
Uptake and Effects of Nanoplastics on the Dinoflagellate Gymnodinium corollarium
This study exposed the marine dinoflagellate Gymnodinium corollarium to nanoplastics and found that, although the organism can ingest particles via phagotrophy, nanoplastic uptake disrupted cell growth and photosynthesis, highlighting the vulnerability of unicellular marine organisms to nanoplastic pollution.
Concentration dependent toxicity of microplastics to marine microalgae
A dose-response study of microplastic effects on marine microalgae found concentration-dependent toxicity across multiple species, with higher MP concentrations reducing growth rates, photosynthesis efficiency, and chlorophyll content, confirming that microplastics pose risks to the base of marine food webs.
Nanoplastics increase the adverse impacts of lead on the growth, morphological structure and photosynthesis of marine microalga Platymonas helgolandica
Combined exposure to polystyrene nanoplastics and lead was found to have greater adverse effects on marine microalga Platymonas helgolandica growth, morphology, and photosynthesis than lead alone, indicating nanoplastics can amplify heavy metal toxicity in marine primary producers.
Nanoplastics exposure modulate lipid and pigment compositions in diatoms
Researchers exposed marine diatoms (Chaetoceros neogracile) to amine-functionalized polystyrene nanoplastics and found disruption to photosynthetic pigments and membrane lipid composition, with exponential-phase cells showing impaired long-chain fatty acid synthesis at high concentrations — identifying lipid and pigment profiles as sensitive biomarkers for nanoplastic stress in marine primary producers.
Microplastics – An emerging contaminants for algae. Critical review and perspectives
This review examines how microplastics and nanoplastics affect algae, which are the foundation of aquatic food chains. Microplastics can reduce algae growth, disrupt photosynthesis, and cause oxidative stress, with smaller nanoplastics being more harmful. Since algae are at the base of the food web, damage to them can ripple through ecosystems and ultimately affect the seafood that humans consume.
Meta-analysis for systematic review of global micro/nano-plastics contamination versus various freshwater microalgae: Toxicological effect patterns, taxon-specific response, and potential eco-risks
A meta-analysis of 1,071 observations found that nanoplastics cause more severe cell membrane damage than microplastics, while microplastics more strongly inhibit photosynthesis in freshwater microalgae. Among polymer types, polyamide caused the highest growth inhibition, polystyrene induced the most toxin release, and diatoms were the most sensitive algal group while cyanobacteria showed exceptional resilience.
Uptake and effects of microplastic particles in selected marine microalgae species; Oxyrrhis marina and Rhodomonas baltica
Researchers investigated the uptake and effects of polystyrene microbeads in two marine microalgae species, finding that the dinoflagellate Oxyrrhis marina ingested both 10 µm and 1-5 µm particles, while Rhodomonas baltica showed interactions with PS microbeads across a 264-hour exposure period.