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20 resultsShowing papers similar to Microcystis aeruginosa's exposure to an antagonism of nanoplastics and MWCNTs: The disorders in cellular and metabolic processes
ClearNanoplastics Promote Microcystin Synthesis and Release from Cyanobacterial Microcystis aeruginosa
Researchers discovered that amino-modified polystyrene nanoplastics promote both the production and release of microcystin, a harmful toxin, from the cyanobacterium Microcystis aeruginosa. The nanoplastics inhibited photosynthesis, induced oxidative stress, and damaged cell membranes, which enhanced toxin synthesis and extracellular release. The findings suggest that nanoplastic pollution in freshwater ecosystems could worsen the threat of harmful algal blooms to aquatic ecology and human health.
Toxic effects and metabolic response mechanisms of amino-modified polystyrene nanoplastics and arsenic on Microcystis aeruginosa
Researchers investigated the combined effects of amine-modified polystyrene nanoplastics and arsenic on a common freshwater cyanobacterium. They found that co-exposure intensified cellular stress, disrupted metabolic processes, and promoted the release of harmful toxins beyond what either pollutant caused individually. The findings reveal previously unrecognized risks to freshwater ecosystems when nanoplastics interact with heavy metal contaminants.
Nanoplastics promote microcystin synthesis and release from cyanobacterial Microcystis aeruginosa.
Researchers showed that amino-modified polystyrene nanoplastics (PS-NH2) stimulate microcystin synthesis and release in the bloom-forming cyanobacterium Microcystis aeruginosa by inhibiting photosystem II and increasing membrane permeability. This is the first direct evidence linking nanoplastics to enhanced cyanotoxin production in freshwater blooms.
Post-exposure recovery of Microcystis aeruginosa from nanoplastics stress: metabolic adaptation and damage resilience
Researchers exposed Microcystis aeruginosa cyanobacteria to polystyrene nanoplastics for 15 days, then transferred them to NP-free medium to study post-exposure recovery. Toxicity was concentration-dependent during exposure, and cells showed metabolic changes and only partial recovery after removal, suggesting persistent effects on cyanobacterial physiology.
Micro- and nanoplastic stress intensifies Microcystis aeruginosa physiology and toxin risks under environmentally relevant water chemistry conditions
Researchers exposed the cyanobacterium Microcystis aeruginosa to environmentally relevant concentrations of micro- and nanoplastics, finding both significantly enhanced algal biomass and microcystin toxin production, with nanoplastics additionally promoting extracellular toxin release.
Polystyrene nanoplastics affect growth and microcystin production of Microcystis aeruginosa
Researchers exposed Microcystis aeruginosa to polystyrene nanoplastics across a range of concentrations and tracked effects on growth, cell aggregation, and microcystin production and release throughout the full growth cycle. They found a dose-dependent growth inhibition and increased aggregation at high concentrations, but nanoplastics at 50 mg/L paradoxically stimulated a period of rapid growth, with complex effects on intracellular and extracellular microcystin levels.
Combined effects of microplastics and excess boron on Microcystis aeruginosa
Researchers studied the combined effects of microplastics and excess boron on a common freshwater cyanobacterium (Microcystis aeruginosa). They found that amino-modified polystyrene microplastics were the most harmful, inhibiting growth and worsening boron toxicity, while other surface-modified types actually stimulated growth. The study reveals that the surface chemistry of microplastics plays a key role in how they interact with other pollutants to affect aquatic microorganisms.
Micrometer scale polystyrene plastics of varying concentrations and particle sizes inhibit growth and upregulate microcystin-related gene expression in Microcystis aeruginosa
Researchers found that polystyrene microplastics inhibited the growth of the cyanobacterium Microcystis aeruginosa in a dose- and size-dependent manner, with smaller particles and higher concentrations causing greater growth suppression. Notably, microplastic exposure also upregulated genes related to microcystin production, suggesting that microplastics could potentially increase the toxicity of harmful algal blooms.
Toxicity mechanism of Nylon microplastics on Microcystis aeruginosa through three pathways: Photosynthesis, oxidative stress and energy metabolism
Researchers investigated how nylon microplastics affect the freshwater cyanobacterium Microcystis aeruginosa and found dose-dependent growth inhibition reaching nearly 48% at the highest concentration. The microplastics disrupted photosynthesis, damaged cell membranes, triggered oxidative stress, and altered the expression of genes involved in energy production and carbon fixation. The study identifies three interconnected pathways through which nylon microplastics harm these important aquatic organisms.
Microcystis aeruginosa copes with toxic effects of micro/nano-plastics with varying particle sizes through different self-regulatory mechanisms
Researchers exposed the freshwater cyanobacterium Microcystis aeruginosa to polystyrene particles of three different sizes ranging from nanoscale to microscale. All particle sizes harmed the algae, but they triggered different cellular defense mechanisms depending on their size, with nanoparticles causing the most severe damage. The findings reveal that particle size is a key factor in determining how microplastics affect aquatic microorganisms.
Acute effects of three surface-modified nanoplastics against Microcystis aeruginosa: Growth, microcystin production, and mechanisms
Researchers found that surface-modified nanoplastics significantly inhibited growth of the cyanobacterium Microcystis aeruginosa while increasing microcystin production by up to 175%, with positively charged particles causing the strongest effects.
Polymer-specific toxicity of microplastics to Microcystis aeruginosa: Growth inhibition, physiological responses, and molecular mechanisms
Researchers exposed the cyanobacterium Microcystis aeruginosa to four polymer types over 12 days and found that all significantly inhibited growth, with PVC causing the greatest inhibition, and identified polymer-specific molecular mechanisms including oxidative stress and photosynthesis disruption.
Toxicity effects of microplastics and nanoplastics with cadmium on the alga Microcystis aeruginosa
Researchers examined the combined toxicity of microplastics, nanoplastics, and cadmium on the freshwater alga Microcystis aeruginosa. The study found that while cadmium alone was most toxic, the combination of plastics and cadmium produced synergistic harmful effects, with nanoplastics causing greater cadmium release and more severe disruption to algal cell membranes than microplastics.
Growth inhibition, toxin production and oxidative stress caused by three microplastics in Microcystis aeruginosa
Researchers tested the effects of three common microplastic types, PVC, polystyrene, and polyethylene, on the growth and toxin production of the freshwater cyanobacterium Microcystis aeruginosa. They found that all three microplastics inhibited algal growth and triggered oxidative stress, with PVC causing the most severe effects. The study also revealed that microplastic exposure stimulated the production of microcystin toxins, suggesting that plastic pollution could worsen harmful algal bloom impacts in freshwater systems.
The photosynthetic toxicity of nano-polystyrene to Microcystis aeruginosa is influenced by surface modification and light intensity
Researchers found that amino-modified nanoplastics are more toxic to the cyanobacterium Microcystis aeruginosa than unmodified particles, and that high light intensity amplifies this toxicity by generating additional reactive oxygen species — including singlet oxygen and hydroxyl radicals — through interactions between visible light and the particle surface.
Interactive Effects of Ionophore Antibiotic Monensin and Polystyrene Microplastics on the Growth and Physiology of Microcystis aeruginosa
Researchers examined the combined effects of the ionophore antibiotic monensin and polystyrene microplastics on the growth and stress physiology of the cyanobacterium Microcystis aeruginosa under controlled laboratory conditions. The study found interactive effects between the two stressors on algal growth rates and physiological stress markers, suggesting microplastics can modify the ecotoxicological impact of co-occurring pharmaceuticals.
Toxicity Effects of Microplastics and Nanoplastics with Cadmium on the Alga Microcystis Aeruginosa
This study tested how microplastics and nanoplastics interact with the heavy metal cadmium to affect the growth of a common freshwater algae, finding that combined exposure was more harmful than either contaminant alone. Nanoplastics adsorbed more cadmium per particle but their smaller size enabled them to penetrate algal cells more easily, with complex effects on cellular toxicity.
Mechanistic study on the increase of Microcystin-LR synthesis and release in Microcystis aeruginosa by amino-modified nano-plastics.
This study examined how amino-modified nanoplastics increase production and release of the toxin Microcystin-LR in the cyanobacterium Microcystis aeruginosa, revealing the cellular and gene-expression mechanisms behind this enhancement. The findings highlight how nanoplastic pollution can amplify harmful algal bloom toxicity.
Responses of Microcystis aeruginosa to polystyrene microplastics: Growth dynamics and implications for water treatment
Researchers studied how polystyrene microplastics affect the harmful freshwater algae Microcystis aeruginosa, which causes toxic algal blooms. They found that while microplastics initially suppressed algae growth, the algae eventually adapted and grew even more, producing higher levels of the dangerous toxin microcystin. The study suggests that microplastic pollution in freshwater could worsen harmful algal blooms and create additional water treatment challenges.
Effects of Hydrogen Peroxide on Cyanobacterium Microcystis aeruginosa in the Presence of Nanoplastics
Researchers found that nanoplastic contamination altered the effectiveness of hydrogen peroxide as a control measure for cyanobacterial harmful algal blooms, with the combined stressor effects depending on temperature and light conditions in a high-throughput multistressor experiment.