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61,005 resultsShowing papers similar to Impacts of Microplastics on Photosynthetic Efficiency and Pigment Composition in Chlorella pyrenoidosa
ClearEffects of different concentrations and particle sizes of microplastics on the full life history of freshwater Chlorella
Researchers investigated how polystyrene microplastics of different concentrations and particle sizes affect the complete life cycle of freshwater Chlorella algae. The study found that microplastics can inhibit algal growth by up to 68%, while also altering chlorophyll content and photosynthetic activity, indicating that microplastic pollution may pose significant risks to the base of aquatic food webs.
Effects of microplastics on the growth, photosynthetic efficiency and nutrient composition in freshwater algae Chlorella vulgaris Beij
Researchers tested how polyethylene and polystyrene microplastics affect the freshwater algae Chlorella vulgaris and found that smaller particles and higher concentrations caused more harm. The microplastics reduced algal growth, photosynthetic efficiency, and disrupted nutrient composition over the 11-day experiment. Since algae form the base of aquatic food chains, this damage could ripple upward through ecosystems that ultimately connect to human food sources.
Phytoplankton response to polystyrene microplastics: Perspective from an entire growth period
Researchers tracked the effects of polystyrene microplastics on the green alga Chlorella pyrenoidosa across its entire growth cycle and found dose-dependent harm during early growth phases. The microplastics reduced photosynthetic activity and inhibited growth by up to 38%, though the algae showed some ability to recover in later growth stages. The study suggests that microplastics can meaningfully disrupt the growth of freshwater phytoplankton, which form the foundation of aquatic food webs.
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.
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.
Microplastics disrupt microalgal carbon fixation: Efficiency and underlying mechanisms
Researchers exposed the microalga Chlorella pyrenoidosa to polyethylene and polyvinyl chloride microplastics and found up to 39% inhibition of carbon fixation, driven by reduced chlorophyll content, increased oxidative stress, and downregulation of genes in the Calvin cycle and chlorophyll metabolism, with implications for aquatic carbon cycling.
Effect of microplastics exposure on the photosynthesis system of freshwater algae
Researchers investigated how polypropylene and polyvinyl chloride microplastics affect the photosynthesis system of freshwater algae and found that both types reduced chlorophyll content and impaired photosynthetic efficiency. The damage was concentration-dependent and worsened over the growth period. The study highlights that microplastic pollution in freshwater can harm algae, which form the base of aquatic food chains.
The toxic effects of polystyrene microplastics on freshwater algae Chlorella pyrenoidosa depends on the different size of polystyrene microplastics
Researchers tested how two sizes of polystyrene microplastics affect the freshwater alga Chlorella pyrenoidosa, an important organism at the base of aquatic food webs. They found that smaller microplastics caused more severe damage to algal growth, photosynthesis, and cellular health than larger ones, with effects worsening over time and at higher concentrations. The study demonstrates that microplastic size is a critical factor determining toxicity to aquatic phytoplankton.
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.
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.
Effects of Nanopolystyrene on the Chlorophyll pigment content of Chlorella vulgaris
Long-term toxicity tests showed that nanopolystyrene exposure inhibited chlorophyll pigment content in the microalga Chlorella vulgaris across red, blue, and white light spectra, with effects varying by light condition and dose. The study provided evidence that nanoplastics can impair algal photosynthesis, with implications for aquatic primary productivity.
Recent progress on the toxic effects of microplastics on Chlorella sp. in aquatic environments
This review summarizes research on how microplastics affect Chlorella, a type of green algae that forms the base of aquatic food chains. Microplastics can slow algae growth, cause oxidative stress, and disrupt photosynthesis, which matters for human health because damage to these foundational organisms can ripple up through the food web and affect the quality of water and seafood.
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.
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.
The influence of microplastics on the toxic effects and biodegradation of bisphenol A in the microalgae Chlorella pyrenoidosa
Researchers found that polystyrene microplastics inhibited the biodegradation of bisphenol A (BPA) by the microalga Chlorella vulgaris, with combined exposure showing greater toxicity than either contaminant alone due to BPA adsorption onto microplastic surfaces.
Polystyrene microplastics decrease accumulation of essential fatty acids in common freshwater algae
Scientists exposed the freshwater alga Chlorella sorokiniana to polystyrene microplastics and found significant reductions in essential omega-3 and omega-6 fatty acid content, suggesting microplastic contamination could reduce the nutritional quality of algae at the base of aquatic food webs.
Effect of microplastics and microplastic-metal combinations on growth and chlorophyll a concentration of Chlorella vulgaris
Researchers tested the effects of polystyrene microplastics alone and in combination with metals (copper, zinc, manganese) on the freshwater microalga Chlorella vulgaris. The study found that low microplastic concentrations had no significant impact, but higher concentrations reduced algal growth and chlorophyll content, with metal-microplastic combinations producing more pronounced effects.
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.
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.
Microplastics and Heavy Metals Removal from Fresh Water and Wastewater Systems Using a Membrane
Researchers tested how polystyrene microplastics affect the growth, photosynthesis, and oxidative stress responses of freshwater microalgae Chlorella vulgaris. Smaller particles caused greater inhibition of growth and chlorophyll synthesis than larger ones.
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.
Influence of microplastics on microalgal performance during wastewater polishing
Researchers studied how five common types of microplastics affect the green alga Chlorella vulgaris during wastewater treatment. They found that while microplastics reduced algal metabolism and growth, the organism maintained its ability to effectively remove nutrients from wastewater. The study demonstrates that Chlorella vulgaris is a robust candidate for bioremediation of microplastic-contaminated wastewater, even under pollutant stress.
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.
Evidence that microplastics at environmentally relevant concentration and size interfere with energy metabolism of microalgal community
In a community of three algae species, environmentally realistic concentrations of micron-sized microplastics reduced sugar production and increased energy consumption in the cells. The microplastics interfered with algal movement, nutrient absorption, and caused lasting oxidative stress and DNA damage. Since algae are the foundation of aquatic food chains, this disruption at realistic pollution levels could ripple through ecosystems that ultimately affect human food sources.