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61,005 resultsShowing papers similar to Effects of Polystyrene Microparticles on Growth and Physiological Metabolism of Microalgae Scendesmus obliquus
ClearEffects of polystyrene nanoplastics on the physiological and biochemical characteristics of microalga Scenedesmus quadricauda
Polystyrene nanoplastics were found to disrupt the physiology and biochemistry of freshwater microalgae, affecting photosynthesis, growth rates, and oxidative stress markers at environmentally relevant concentrations. The results highlight nanoplastics as a threat to phytoplankton, the base of freshwater food webs.
Toxicity of polystyrene microplastics in freshwater algae Scenedesmus obliquus: Effects of particle size and surface charge
Researchers investigated how polystyrene microplastics of different sizes and surface charges affect the freshwater algae Scenedesmus obliquus. The study found that smaller 1-micrometer particles caused greater oxidative stress, reduced photosynthetic effectiveness, and decreased membrane integrity compared to larger 12-micrometer particles, with effects being dose-dependent.
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.
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.
Polystyrene 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.
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.
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.
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.
Unravelling the toxicity mechanisms of polystyrene nanoplastics on physiological and transcriptomic responses of the marine dinoflagellate Alexandrium minutum
Researchers exposed the toxic marine dinoflagellate Alexandrium minutum to polystyrene nanoplastics at concentrations from 0.1 to 50 mg/L and measured physiological responses and toxin production. NP exposure inhibited growth and photosynthesis, altered gene expression, and changed the profile of paralytic shellfish toxins produced by the alga.
Investigation of the toxic effects of different polystyrene micro-and nanoplastics on microalgae Chlorella vulgaris by analysis of cell viability, pigment content, oxidative stress and ultrastructural changes
Researchers examined the toxic effects of different-sized polystyrene micro- and nanoplastics on the microalga Chlorella vulgaris in long-term exposure tests. The study found that smaller particles (20 and 50 nm) caused greater reductions in cell viability and chlorophyll concentration than larger ones, with surface functionalization also influencing toxicity and ultrastructural damage.
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.
Polystyrene Microplastics Induce Photosynthetic Impairment in Navicula sp. at Physiological and Transcriptomic Levels
Researchers exposed freshwater diatom algae to polystyrene microplastics and found significant damage to their photosynthetic capacity within 24 to 48 hours. The microplastics reduced chlorophyll content, damaged cell membranes, and triggered oxidative stress responses, with gene analysis revealing disruption of key pathways related to photosynthesis and carbon fixation. The findings suggest that microplastic pollution in freshwater environments could impair the ability of algae to produce oxygen and support aquatic food webs.
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.
Adverse physiological and molecular level effects of polystyrene microplastics on freshwater microalgae
Researchers investigated the toxic effects of polystyrene microplastics on the freshwater microalgae Euglena gracilis. The study found that microplastic exposure at 1 mg/L induced vacuole formation within 24 hours and significantly disrupted photosynthesis, with smaller particles (0.1 micrometers) causing more severe cellular damage than larger ones (5 micrometers), suggesting size-dependent toxicity mechanisms.
Effects of polystyrene microplastics on growth, physiological traits of Microcystis aeruginosa and microcystin production and release
Researchers examined how polystyrene microplastics of various sizes affect the growth and toxin production of the harmful algae Microcystis aeruginosa. They found that microplastics inhibited algal growth at low densities, with the smallest particles causing the greatest inhibition, and also disrupted the algae's antioxidant defense system. Notably, microplastic exposure led to a significant increase in the production of the toxin microcystin-LR, raising concerns about how microplastic pollution could worsen harmful algal blooms.
Dose-dependent effects of polystyrene nanoplastics on growth, photosynthesis, and astaxanthin synthesis in Haematococcus pluvialis
Researchers exposed the microalga Haematococcus pluvialis to polystyrene nanoplastics at various concentrations and found that higher doses significantly inhibited growth and photosynthesis. Interestingly, the stressed algae produced more astaxanthin, a natural antioxidant pigment, as a defense response. The study shows that nanoplastic pollution can disrupt algal growth while triggering biochemical stress responses in aquatic organisms.
Effects of polystyrene nanoplastics on growth and hemolysin production of microalgae Karlodinium veneficum
Researchers exposed the harmful algal bloom species Karlodinium veneficum to polystyrene nanoplastics and found that high concentrations significantly inhibited algal growth and caused oxidative damage to cells. The nanoplastics disrupted cell morphology and weakened photosynthesis and energy metabolism in the algae. Notably, while growth was suppressed, the algae produced more hemolysin toxin, suggesting nanoplastic pollution could make harmful algal blooms more toxic.
Impact of Microplastics on Growth and Lipid Accumulation in Scenedesmus quadricauda
Researchers exposed the microalga Scenedesmus quadricauda to polyethylene, polystyrene, and polypropylene microplastics at 250 mg/L in four size fractions (50–500 µm) and found all MPs suppressed algal growth while increasing lipid accumulation. Polypropylene caused the strongest inhibitory effects and the highest lipid yield—especially at the smallest 50 µm size—suggesting MPs stress-drive lipid overproduction in microalgae.
Different effecting mechanisms of two sized polystyrene microplastics on microalgal oxidative stress and photosynthetic responses
Researchers found that 1 micrometer polystyrene microplastics caused more oxidative stress and cell death in marine diatoms, while 0.1 micrometer particles caused greater light shading and pigment decline, revealing distinct size-dependent toxicity mechanisms.
Toxic effects of pristine and aged polystyrene and their leachate on marine microalgae Skeletonema costatum
Researchers compared the toxic effects of pristine and aged polystyrene microplastics, as well as their chemical leachates, on the marine microalga Skeletonema costatum. The study found that aged microplastics and their leachates caused greater growth inhibition, reduced chlorophyll concentration, and triggered stronger oxidative stress responses than pristine particles, suggesting that environmental weathering increases the toxicity of plastic debris.
Toxicity Effects of Polystyrene Nanoplastics with Different Sizes on Freshwater Microalgae Chlorella vulgaris
Researchers tested how two sizes of polystyrene nanoplastics (50 nm and 70 nm) affected the common freshwater microalgae Chlorella vulgaris. Both sizes reduced algae growth, chlorophyll content, and photosynthetic activity in a dose-dependent manner, with the smaller particles causing more damage. Since microalgae form the base of aquatic food chains, their sensitivity to nanoplastics could have cascading effects on entire freshwater ecosystems.
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.
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.
Mechanism of transport and toxicity response of Chlorella sorokiniana to polystyrene nanoplastics
Researchers studied how polystyrene nanoplastics are transported into freshwater algae cells and what toxic effects they cause. They found that the tiny plastic particles entered the cells through specific pathways and triggered oxidative stress, inhibiting algae growth. The study provides new insights into how nanoplastics disrupt the base of aquatic food chains by damaging microscopic organisms.