Toxicity and transformation of graphene oxide and reduced graphene oxide in bacteria biofilm

Guo, Zhiling; Xie, Changjian; Zhang, Peng; Zhang, Junzhe; Wang, Guohua; He, Xiao; Ma, Yuhui; Zhao, Bin; Zhang, Zhiyong

doi:10.1016/j.scitotenv.2016.12.093

Cited by 113 publications

(69 citation statements)

References 40 publications

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“…To date, graphene and its derivatives have been proved to toxic to a variety of species, including vertebrates [ 12 ], algae [ 13 ], bacteria [ 14 , 15 ] and fungi [ 16 ]. However, several studies are focused on the effect on plant species, which are extremely sensitive to their growth environment [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Various Physiological Response to Graphene Oxide and Amine-Functionalized Graphene Oxide in Wheat (Triticum aestivum)

Chen

Yang

et al. 2018

Molecules

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An increasing number of investigations have been performed on the phytotoxicity of carbon-based nanomaterials duo to their extensive use in various fields. In the present study, we investigated the phytotoxicity of unfunctionalized graphene oxide (GO) and amine-functionalized graphene oxide (G-NH2) on wheat (Triticum aestivum) in the concentration range from 125 to 2000 μg/mL after 9 days of hydroponic culture. Our results found that the incubation with both nanomaterials did not affect the final seed germination rate, despite some influence in the initial stage. Transmission electron microscopy (TEM) observations indicated that exposure to GO at a high concentration (above 1000 μg/mL) resulted in a severe loss of morphology of seedlings, and a decrease in root length, shoot length and relative biomass, along with obvious damage to plant tissue structures (root, stem and leaf) when compared with the control. GO induced increased damage to root cells, which were determined by electrolyte leakage. Conversely, the plant growth was enhanced under G-NH2 exposure, and the root and stem lengths were increased by 19.27% and 19.61% at 2000 μg/mL, respectively. The plant tissue structures were not affected, and neither GO nor G-NH2 were observed to accumulate in the wheat plant root cells. The present investigations provide important information for evaluation of the environmental safety of GO and better understanding plant-nanoparticle interactions.

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Section: Introductionmentioning

confidence: 99%

Various Physiological Response to Graphene Oxide and Amine-Functionalized Graphene Oxide in Wheat (Triticum aestivum)

Chen

Yang

et al. 2018

Molecules

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“…Bacteria are an essential community involved in many critical geochemical and biochemical processes, including carbon and nitrogen cycling. [34] Their biological activity (e.g., respiration, [31] excretion of organic acids [35] ) can trigger various chemical transformations of ENMs. Nanoplant interfaces such as nanoroot and nanoleaf interfaces are also important locations of ENMs transformation before their entry into plants.…”

Section: Location and Drivers Of Enms Transformation In Soil-plant Symentioning

confidence: 99%

Nanomaterial Transformation in the Soil–Plant System: Implications for Food Safety and Application in Agriculture

Zhang

Guo

Zhang

et al. 2020

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Engineered nanomaterials (ENMs) have huge potential for improving use efficiency of agrochemicals, crop production, and soil health; however, the behavior and fate of ENMs and the potential for negative long‐term impacts to agroecosystems remain largely unknown. In particular, there is a lack of clear understanding of the transformation of ENMs in both soil and plant compartments. The transformation can be physical, chemical, and/or biological, and may occur in soil, at the plant interface, and/or inside the plant. Due to these highly dynamic processes, ENMs may acquire new properties distinct from their original profile; as such, the behavior, fate, and biological effects may also differ significantly. Several essential questions in terms of ENMs transformation are discussed, including the drivers and locations of ENM transformation in the soil–plant system and the effects of ENM transformation on analyte uptake, translocation, and toxicity. The main knowledge gaps in this area are highlighted and future research needs are outlined so as to ensure sustainable nanoenabled agricultural applications.

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“…The effect of graphene-based materials (GNMs) on bacterial biofilms was not well understood. Guo et al (2017) investigated the graphene oxide (GO) and redox graphene (rGO) on the process of biofilm formation with E.…”

Section: Impact Of Nanomaterialsmentioning

confidence: 99%

Biological Fixed Film

Kim

Kim²,

Park³

et al. 2018

Water Environment Research

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Toxicity and transformation of graphene oxide and reduced graphene oxide in bacteria biofilm

Cited by 113 publications

References 40 publications

Various Physiological Response to Graphene Oxide and Amine-Functionalized Graphene Oxide in Wheat (Triticum aestivum)

Various Physiological Response to Graphene Oxide and Amine-Functionalized Graphene Oxide in Wheat (Triticum aestivum)

Nanomaterial Transformation in the Soil–Plant System: Implications for Food Safety and Application in Agriculture

Biological Fixed Film

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