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61,005 resultsShowing papers similar to Effects of different types of microplastics on the growth and low molecular weight organic acids release of Dunaliella salina
ClearAssessment of the Influence of Size and Concentration on the Ecotoxicity of Microplastics to Microalgae Scenedesmus sp., Bacterium Pseudomonas putida and Yeast Saccharomyces cerevisiae
Researchers assessed the ecotoxicity of five common microplastic types on microalgae, bacteria, and yeast, finding that polyvinyl chloride caused the most growth inhibition and that smaller particle sizes generally increased harmful effects.
[Effects of Polyethylene Microplastics on Growth and Halocarbon Release of Marine Microalgae].
Lab experiments showed that polyethylene microplastics affected two species of marine microalgae differently, inhibiting growth of one while promoting growth of the other. Microplastic stress also increased production of reactive oxygen species and altered the release of volatile halocarbons, trace gases important for climate and ozone chemistry.
Physiological and metabolic toxicity of polystyrene microplastics to Dunaliella salina
Researchers studied the physiological and metabolic effects of polystyrene microplastics on the marine microalga Dunaliella salina. They found that both pristine and aged microplastics inhibited growth, increased reactive oxygen species production by up to 2.2-fold, and caused significant membrane lipid damage. Metabolomic analysis revealed that the microplastics disrupted amino acid metabolism and energy transport pathways, ultimately inhibiting cell division.
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.
Comparative assessment of MP effects on pigment composition and lipid profiles in three marine microalgae
Researchers exposed three marine microalgae species to polyethylene and polypropylene microplastics and found that the particles altered pigment composition and lipid profiles in species-specific ways. Microplastic exposure generally reduced photosynthetic pigments and shifted fatty acid profiles, with effects varying depending on the polymer type and concentration ratio. The study suggests that microplastic pollution could disrupt the biochemistry of ecologically and commercially important microalgae at the base of marine food webs.
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.
Interactive adverse effects of low-density polyethylene microplastics on marine microalga Chaetoceros calcitrans
Researchers examined the toxicological effects of low-density polyethylene microplastics on the marine microalga Chaetoceros calcitrans. They found concentration-dependent inhibition of algal growth up to 85 percent, along with reduced photosynthetic efficiency and significant oxidative stress responses. The microplastics physically adhered to algal cell walls, causing observable structural damage, suggesting that polyethylene microplastic pollution may pose serious risks to marine phytoplankton at the base of ocean food chains.
Effects of polyethylene terephthalate microplastics on cell growth, intracellular products and oxidative stress of Scenedesmus sp.
Researchers exposed freshwater microalgae to PET microplastics, a common plastic found in beverage bottles and textiles. Higher concentrations of PET particles significantly reduced algal growth and disrupted the cells' internal production of lipids, carbohydrates, and proteins. The study suggests that PET microplastic pollution in wastewater could harm the tiny organisms that form the foundation of aquatic food webs.
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.
Impact of weathered and virgin polyethylene terephthalate (PET) micro- and nanoplastics on growth dynamics and the production of extracellular polymeric substances (EPS) of microalgae
Researchers compared how fresh and sun-weathered PET micro and nanoplastics affect microalgae growth and the sticky substances (EPS) algae produce in response to stress. Weathered plastics triggered more EPS production and had greater effects on algae than fresh plastics did. Since algae form the base of aquatic food chains and most ocean microplastics have been weathered by sunlight, these findings suggest real-world impacts on marine ecosystems may be worse than laboratory studies with fresh plastics indicate.
The release inhibition of organic substances from microplastics in the presence of algal derived organic matters: Influence of the molecular weight-dependent inhibition heterogeneities
This study found that algae-derived organic matter in water affects the release of chemicals from microplastics, with larger molecular weight compounds having a greater inhibitory effect. Understanding these interactions is important for predicting how microplastics behave in natural water environments and the potential release of toxic additives.
Effects of micro-sized polyethylene spheres on the marine microalga Dunaliella salina: Focusing on the algal cell to plastic particle size ratio
Researchers exposed the marine microalga Dunaliella salina to polyethylene microplastics that were larger than the algal cells. Surprisingly, they found that the microplastics actually enhanced algal growth and photosynthetic activity, potentially due to trace chemicals leaching from the plastic. The study highlights that the ratio of microplastic size to algal cell size is a key factor in determining toxicity, with smaller particles relative to cell size causing increasingly adverse effects.
The interactions between microplastic polyvinyl chloride and marine diatoms: Physiological, morphological, and growth effects
Researchers investigated the toxic effects of polyvinyl chloride (PVC) microplastics on three marine diatom species, finding that increasing PVC concentrations and exposure times disrupted photosynthetic efficiency and reduced cell density in Phaeodactylum tricornutum, Chaetoceros gracilis, and Thalassiosira sp.
A multi-factor analysis evaluating the toxicity of microplastics on algal growth
This meta-analysis evaluated how microplastic characteristics such as polymer type, size, shape, and concentration influence algal growth, finding that effects range from inhibition to enhancement depending on multiple interacting factors.
Do plastic particles affect microalgal photosynthesis and growth?
This study investigated whether polystyrene particles of different sizes and charges affect growth and photosynthesis in three marine microalgae species. The results showed that charged particles caused greater inhibition of algal growth at the lowest concentrations tested, suggesting that plastic particle charge and size influence their toxicity to primary producers at the base of marine food chains.
Determination of polyethylene microplastics toxicity by microalgae Scenedesmus sp.
This study investigated the toxicity of polyethylene microplastics on the freshwater microalgae Scenedesmus sp. Results showed that microplastics inhibited algal growth and photosynthesis, indicating potential harm to aquatic ecosystems.
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.
Not so dangerous? PET microplastics toxicity on freshwater microalgae and cyanobacteria
Researchers tested whether PET microplastics are toxic to freshwater algae and cyanobacteria and found that the effects were relatively mild compared to other plastic types. While PET particles did cause some changes in growth and photosynthesis at high concentrations, the organisms largely tolerated the exposure. The study suggests that not all microplastics are equally harmful, and PET may pose lower risks to aquatic primary producers.
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.
Microplastic interactions with freshwater microalgae: Hetero-aggregation and changes in plastic density appear strongly dependent on polymer type
Researchers studied interactions between microplastics and freshwater microalgae, finding that microplastics can physically attach to algal cells to form hetero-aggregates, altering both particle behavior and algal physiology.
The interactions between micro polyvinyl chloride (mPVC) and marine dinoflagellate Karenia mikimotoi: The inhibition of growth, chlorophyll and photosynthetic efficiency
Researchers exposed the harmful dinoflagellate Karenia mikimotoi to PVC microplastics at concentrations up to 100 mg/L and found dose-dependent reductions in algal growth, chlorophyll content, and photosynthetic efficiency. Scanning electron microscopy revealed that microplastic beads physically wrapped around the algal cells, contributing to growth inhibition through physical blockage and aggregation. The study demonstrates that microplastic pollution could influence the dynamics of harmful algal bloom species in marine ecosystems.
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.
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.
Microplastics impacts in seven flagellate microalgae: Role of size and cell wall
Seven marine flagellate microalgae species were incubated with 1-micrometer polystyrene microplastics at 10 mg/L, revealing that cell size and the presence of a cell wall strongly influenced the degree of microplastic-induced physiological and growth effects across species.