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61,005 resultsShowing papers similar to Two plant-growth-promoting Bacillus species can utilize nanoplastics
ClearPolystyrene microplastic degradation by a novel PGPR Bacillus spizizenii
Researchers discovered that a beneficial soil bacterium, Bacillus spizizenii, can break down polystyrene microplastics with nearly 86% efficiency over 30 days. Chemical analysis confirmed that the bacteria significantly altered the plastic's molecular structure, and microscopy showed visible surface degradation. The finding suggests that naturally occurring soil bacteria could potentially be harnessed as a biological tool for reducing microplastic pollution.
Adaptive responses of Bacillus subtilis underlie differential nanoplastic toxicity with implications for root colonization
Researchers found that nanoplastic toxicity to the beneficial soil bacterium Bacillus subtilis varies significantly depending on the bacteria's growth mode. The study suggests that nanoplastics can substantially limit the ability of plant growth-promoting bacteria to colonize roots, with implications for soil health and agricultural productivity in environments contaminated with plastic particles.
Exposure to polystyrene nanoplastics reduces bacterial and fungal biomass in microfabricated soil models
Researchers used micro-engineered soil models to study how polystyrene nanoplastics affect soil bacteria and fungi. They found that nanoplastic exposure reduced both bacterial and fungal biomass, with bacteria showing a linear dose-dependent decline and fungi being affected even at the lowest concentrations. The study suggests that nanoplastic pollution in soil may suppress the microbial communities essential for healthy soil function.
Biological Responses of Bacillus subtilis toward Nanoplastics under Nutritional Stress in Freshwater Ecosystems
Researchers found that polystyrene nanoplastics are toxic to the bacterium Bacillus subtilis under nutrient-poor conditions typical of natural freshwater, with even very low concentrations (2 micrograms per liter) reducing bacterial growth during prolonged exposure. The bacteria initially defended themselves by secreting protective substances, but these defenses eventually failed, leading to irreversible cell death from membrane damage and oxidative stress.
Palladium-doped and undoped polystyrene nanoplastics in a chronic toxicity test for higher plants: Impact on soil, plants and ammonium oxidizing bacteria
Researchers investigated the effects of polystyrene nanoplastics on agricultural soils and plant growth using palladium-doped particles to enable tracking at environmentally realistic concentrations. The study found that nanoplastics can be taken up by plants and affect soil ammonium-oxidizing bacteria, with impacts varying depending on soil type and nanoplastic concentration.
A novel Bacillus velezensis strain with the ability to simultaneously biodegrade polystyrene microplastics and fungicide carbendazim
Researchers isolated a new bacterial strain, Bacillus velezensis M1, from contaminated soil that can break down both polystyrene microplastics and the fungicide carbendazim simultaneously. Over 60 days, the bacterium reduced polystyrene mass by about 11% and carbendazim by nearly 57%, with even better performance when both pollutants were present together. The discovery suggests that naturally occurring soil bacteria could be harnessed for bioremediation of environments contaminated with multiple types of pollutants.
Bacillus subtilis, a promising bacterial candidate for trapping nanoplastics during water treatment
Researchers found that the probiotic bacterium Bacillus subtilis can effectively trap polystyrene nanoplastics from water, with most nanoparticles clustering around the bacterial cells. At a concentration of 10 mg/L, over 73% of the nanoplastics' environmental state was altered through interaction with the bacteria. The study suggests B. subtilis could be a promising candidate for biological nanoplastic removal during water treatment, while simultaneously processing nitrogen compounds.
A novel bacterial combination for efficient degradation of polystyrene microplastics
Researchers tested three bacterial species, alone and in combinations, for their ability to break down polystyrene microplastics used as the sole food source. The combination of Stenotrophomonas maltophilia and Bacillus velezensis achieved the most impressive results, degrading 43.5 percent of the polystyrene in 60 days. The study suggests that carefully selected bacterial partnerships, rather than single species, may be more effective for biological degradation of plastic waste.
Effects of polystyrene nanoparticles on the microbiota and functional diversity of enzymes in soil
Polystyrene nanoparticles applied to soil at environmentally relevant concentrations caused significant reductions in microbial biomass and disrupted the activity of enzymes critical for nutrient cycling within 28 days. The study provides the first experimental evidence that nanoplastics can act as antimicrobial agents in soil, with potential consequences for soil fertility and ecosystem function.
The degradation of microplastic by microorganisms: A generous way to treat Plastic waste
This review examines microbial biodegradation of microplastics in soil environments, finding that bacteria such as Bacillus subtilis and Bacillus gottheilii can degrade microplastics that accumulate from plastic mulching, sewage waste, and direct deposition, offering a biological pathway to reduce soil microplastic contamination.
Biodegradation of polyethylene with polyethylene-group-degrading enzyme delivered by the engineered Bacillus velezensis
Researchers engineered a strain of the soil bacterium Bacillus velezensis to produce enzymes that break down polyethylene, the most common type of microplastic found in vegetable-growing soils. The engineered bacteria degraded about 23 percent of polyethylene microplastics over 20 days in laboratory tests. The study introduces a promising bioengineering approach to tackling the widespread problem of plastic pollution in agricultural soils.
Growth reduction of- and interactions with nanoplastic particles in a soil bacterium and a soil fungus
Researchers found that nanosized polystyrene particles reduced the growth and enzymatic activity of both a soil bacterium (Pseudomonas) and a soil fungus (Coprinopsis), and that fungal hyphae strongly attracted nanoplastic beads, potentially concentrating them in specific soil pore spaces.
Effects of polystyrene microplastics on the agronomic traits and rhizosphere soil microbial community of highland barley
Researchers investigated how polystyrene microplastics of different sizes and concentrations affect highland barley growth and the microbial communities in surrounding soil. They found that smaller particles reduced grain weight while larger particles decreased spike dimensions, and all microplastic treatments significantly lowered soil bacterial diversity. The study also showed that adding degrading bacteria helped restore microbial community structure closer to normal conditions.
Time-resolved colonization patterns of bacteria and fungi on polystyrene microplastics in floodplain soils
Scientists studied how bacteria and fungi grow on tiny plastic particles (microplastics) buried in soil over several months. They found that these microbes form films on the plastic surfaces and some types can actually break down the plastic particles. This matters because microplastics are everywhere in our environment, and understanding how soil microbes interact with them could help us learn whether these plastics break down naturally or accumulate in ways that might affect our food and water.
The Biodegradation of Polystyrene by Soil Bacteria
Researchers investigated whether soil bacteria could biodegrade polystyrene, a plastic historically considered highly resistant to natural degradation since studies dating to the 1970s first examined its environmental persistence. They found evidence that certain soil bacterial communities can break down polystyrene, suggesting a potential biological pathway for remediating this persistent plastic pollutant in terrestrial and marine environments.
Microbial Isolates in Microplastic-Polluted Soil
Researchers isolated and characterized microbial communities from microplastic-polluted soil, identifying bacteria capable of colonizing plastic surfaces and assessing their potential roles in plastic degradation and soil nutrient cycling.
Bacteria as Ecological Tools: Pioneering Microplastic Biodegradation
This systematic review examines how bacteria can be used to biologically break down microplastic particles. The researchers identified several bacterial species capable of degrading different types of plastics, offering a potential natural solution to microplastic pollution. Finding biological methods to break down microplastics could reduce the amount of these particles that accumulate in our environment and food chain.
Microbial Allies in Plastic Degradation: Specific bacterial genera as universal plastic-degraders in various environments
Researchers identified specific bacterial genera capable of degrading multiple types of plastic across different environments including landfill soil, sewage sludge, and river water. They found that certain bacteria, such as Pseudomonas and Bacillus species, consistently appeared as effective plastic degraders regardless of the environment. The study suggests that these universal plastic-degrading bacteria could be valuable candidates for developing bioremediation strategies to address plastic pollution.
Mitigating microplastic toxicity: How particle size and degrading bacteria influence Cucumis sativus L. seedlings
Researchers tested how polystyrene microplastics of different sizes affect cucumber seedlings and whether adding plastic-degrading bacteria could reduce the damage. Surprisingly, large microplastic particles actually increased plant height and leaf area, while adding degrading bacteria further improved plant growth and enhanced beneficial soil microbial communities. The study suggests that biological degradation strategies using specialized bacteria could help mitigate microplastic pollution in agricultural settings.
Continuous generation and release of microplastics and nanoplastics from polystyrene by plastic-degrading marine bacteria
Researchers discovered that marine bacteria capable of degrading plastics continuously generate and release microplastics and nanoplastics as they break down polystyrene. Rather than fully eliminating the plastic, the bacterial degradation process fragments it into smaller particles. The findings reveal an overlooked source of secondary micro- and nanoplastic pollution in ocean environments.
Phenotypic and Genomic Characterization of Polyethylene-Degrading Bacillus cereus PE-1 Enriched from Landfill Microbial Consortium
Scientists found a bacteria called Bacillus cereus PE-1 in landfill soil that can actually eat and break down plastic bags and containers (polyethylene). The bacteria damaged the plastic's surface and reduced its weight by about 5% in just 30 days, suggesting it could potentially help clean up plastic pollution in the environment. While this research is still early and needs more testing, it offers hope for using natural bacteria to tackle the growing problem of plastic waste that threatens our ecosystems and food chain.
Biodegradation of polyethylene (PE), polypropylene (PP), and polystyrene (PS) microplastics by floc-forming bacteria, Bacillus cereus strain SHBF2, isolated from a commercial aquafarm
Researchers isolated a naturally occurring bacterium (Bacillus cereus SHBF2) from a fish farm that can break down polyethylene, polypropylene, and polystyrene microplastics by using them as a food source. After 60 days, the bacteria degraded up to nearly 7% of polyethylene by weight and visibly damaged all three plastic types, offering a potential biological approach to cleaning up microplastic pollution in aquatic environments.
Unique Raoultella species isolated from petroleum contaminated soil degrades polystyrene and polyethylene
Researchers isolated a bacterium called Raoultella sp. DY2415 from oil-contaminated soil and found it could degrade both polyethylene and polystyrene plastics within 60 days, introducing new oxygen-containing groups into the plastic structure. This discovery adds a new microbial candidate to the search for biological solutions to plastic pollution.
Genomic and proteomic analysis of Bacillus subtilis as microplastic bioremediation agents
Researchers analyzed the genes and proteins of Bacillus subtilis bacteria to understand how this common soil microbe might be used to break down microplastics biologically. The genomic and proteomic analysis identified enzymes that could potentially degrade plastic polymers, advancing efforts to develop microbial bioremediation of plastic pollution.