The plastisphere of biodegradable and conventional microplastics from residues exhibit distinct microbial structure, network and function in plastic-mulching farmland

Li, Kang; Jia, Weiqian; Xu, Libo; Zhang, Mengjun; Huang, Yi

doi:10.1016/j.jhazmat.2022.130011

Cited by 121 publications

(25 citation statements)

References 101 publications

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“…In addition, some bacteria belonging to Actinobacteria , Alphaproteobacteria , Betaproteobacteria , and Gammaproteobacteria were more enriched in the PLA-amended microcosms (Figure S10). These results were consistent with a previous finding that Actinobacteria and Proteobacteria were significantly enriched in the plastisphere of synthetic polymers . Given that members of these microbial taxa were capable of degrading natural organic matter and polymers, they likely provide electron donors for the sulfate reduction.…”

Section: Resultssupporting

confidence: 92%

“…These results were consistent with a previous finding that Actinobacteria and Proteobacteria were significantly enriched in the plastisphere of synthetic polymers. 50 Given that members of these microbial taxa were capable of degrading natural organic matter and polymers, they likely provide electron donors for the sulfate reduction. Overall, the metagenomic analysis coupled with S isotopic data provided insight into the underlying mechanism that PLA microplastics affected the functional microorganisms and genes involved in S cycles.…”

Section: Effect Of Microplastics On the Diversity Of Microbial Communitymentioning

confidence: 99%

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Stable Isotopic and Metagenomic Analyses Reveal Microbial-Mediated Effects of Microplastics on Sulfur Cycling in Coastal Sediments

Yang

et al. 2023

Environ. Sci. Technol.

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Microplastics are readily accumulated in coastal sediments, where active sulfur (S) cycling takes place. However, the effects of microplastics on S cycling in coastal sediments and their underlying mechanisms remain poorly understood. In this study, the transformation patterns of different S species in mangrove sediments amended with different microplastics and their associated microbial communities were investigated using stable isotopic analysis and metagenomic sequencing. Biodegradable poly(lactic acid) (PLA) microplastics treatment increased sulfate (SO 4 2−) reduction to yield more acid-volatile S and elementary S, which were subsequently transformed to chromiumreducible S (CRS). The S isotope fractionation between SO 4 2− and CRS in PLA treatment increased by 9.1‰ from days 0 to 20, which was greater than 6.8‰ in the control. In contrast, recalcitrant petroleum-based poly(ethylene terephthalate) (PET) and polyvinyl chloride (PVC) microplastics had less impact on the sulfate reduction, resulting in 7.6 and 7.7‰ of S isotope fractionation between SO 4 2− and CRS from days 0 to 20, respectively. The pronounced S isotope fractionation in PLA treatment was associated with increased relative abundance of Desulfovibrio-related sulfate-reducing bacteria, which contributed a large proportion of the microbial genes responsible for dissimilatory sulfate reduction. Overall, these findings provide insights into the potential impacts of microplastics exposure on the biogeochemical S cycle in coastal sediments.

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Section: Resultssupporting

confidence: 92%

Section: Effect Of Microplastics On the Diversity Of Microbial Communitymentioning

confidence: 99%

Stable Isotopic and Metagenomic Analyses Reveal Microbial-Mediated Effects of Microplastics on Sulfur Cycling in Coastal Sediments

Yang

et al. 2023

Environ. Sci. Technol.

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“…No obvious or separated clusters among the SMs in soil, soil and SMs in air were observed. In addition, in the early and middle stages of the experiment, the SMs were more similar to the microbial community in the environment, which should be in the period of establishment and disorder of the microbial community [48] . The specific analysis of the SMs and the corresponding environment showed that two separated clusters were formed.…”

Section: Resultsmentioning

confidence: 89%

Abandoned disposable masks become hot substrates for plastisphere, whether in soil, atmosphere or water

Zhang

Shan

et al. 2023

Journal of Hazardous Materials

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“…Microbes typically develop sophisticated networks dealing with external disturbances, and core microbes can strongly influence the structure of entire microbial communities through microbe−microbe interactions. 52 Comamonadaceae, a critical microbial taxon that has been proven to control phyllosphere microbial abundance actively, 53 showed significant increases after NPs' exposure (Figure S11b). We analyzed the cooccurrence network of tomato phyllosphere microbes.…”

Section: Resultsmentioning

confidence: 99%

Toxicity Mechanisms of Nanoplastics on Crop Growth, Interference of Phyllosphere Microbes, and Evidence for Foliar Penetration and Translocation

Shi,

Liu,

Lian

et al. 2023

Environ. Sci. Technol.

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Despite the increasing prevalence of atmospheric nanoplastics (NPs), there remains limited research on their phytotoxicity, foliar absorption, and translocation in plants. In this study, we aimed to fill this knowledge gap by investigating the physiological effects of tomato leaves exposed to differently charged NPs and foliar absorption and translocation of NPs. We found that positively charged NPs caused more pronounced physiological effects, including growth inhibition, increased antioxidant enzyme activity, and altered gene expression and metabolite composition and even significantly changed the structure and composition of the phyllosphere microbial community. Also, differently charged NPs exhibited differential foliar absorption and translocation, with the positively charged NPs penetrating more into the leaves and dispersing uniformly within the mesophyll cells. Additionally, NPs absorbed by the leaves were able to translocate to the roots. These findings provide important insights into the interactions between atmospheric NPs and crop plants and demonstrate that NPs' accumulation in crops could negatively impact agricultural production and food safety.

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The plastisphere of biodegradable and conventional microplastics from residues exhibit distinct microbial structure, network and function in plastic-mulching farmland

Cited by 121 publications

References 101 publications

Stable Isotopic and Metagenomic Analyses Reveal Microbial-Mediated Effects of Microplastics on Sulfur Cycling in Coastal Sediments

Stable Isotopic and Metagenomic Analyses Reveal Microbial-Mediated Effects of Microplastics on Sulfur Cycling in Coastal Sediments

Abandoned disposable masks become hot substrates for plastisphere, whether in soil, atmosphere or water

Toxicity Mechanisms of Nanoplastics on Crop Growth, Interference of Phyllosphere Microbes, and Evidence for Foliar Penetration and Translocation

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