Enhanced Cd accumulation by Graphene oxide (GO) under Cd stress in duckweed

Yang, Lin; Chen, Yikai; Shi, Leqian; Yu, Jie; Yao, Jie; Sun, Jinge; Zhao, Ling; Sun, Jinsheng

doi:10.1016/j.aquatox.2020.105579

Cited by 21 publications

(14 citation statements)

References 24 publications

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“…Maldonado et al (2022) further revealed that the metabolization of antibiotics occurs in three phases in duckweed which contribute to the removal of antibiotics residues in water. However, the process of antibiotic degradation in duckweed is accompanied by the increase of antioxidant enzymes, slower growth, reduced photosynthesis and other physiological processes (Yang et al, 2020a;Farid et al, 2022), which can be regarded as a cost of adapting to the environmental pollution.…”

Section: Discussionmentioning

confidence: 99%

Physiological responses and antibiotic-degradation capacity of duckweed (Lemna aequinoctialis) exposed to streptomycin

et al. 2022

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Aquatic plants are constantly exposed to various water environmental pollutants. Few data on how antibiotics affect duckweed health and its removal ability. The aim of this study was to investigate the impact of streptomycin on the physiological change and uptake capability in duckweed (Lemna aequinoctialis) after exposure at different time points (0, 5, 10, 15 and 20 days). Duckweeds were exposed to streptomycin at a range of concentrations (0.1-10 mM). Results indicated that the high streptomycin concentrations (≥1 mM) resulted in a lower duckweed biomass (21.5-41.5%), RGR (0.258-0.336 g d−1), decrease in total Chl and increase in carotenoids. Antioxidative enzymes, including CAT (18-42.88 U mg protein-1), APX (0.41-0.76 U mg protein-1), and SOD (0.52-0.71 U mg protein-1) were found to accumulate in the streptomycin groups in comparison to the control group. The significant reduction (72-82%) in streptomycin content at 20 d compared to the control (40-55%) suggested that duckweed has a high ability in removing streptomycin. Transcriptome analysis showed that the secondary metabolic pathways including phenylpropanoid biosynthesis and flavonoid biosynthesis were significantly upregulated in the streptomycin setup compared to the control. Therefore, our findings suggested that duckweed can contribute to the streptomycin degradation, which should be highly recommended to the treatment of aquaculture wastewater and domestic sewage.

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Section: Discussionmentioning

confidence: 99%

Physiological responses and antibiotic-degradation capacity of duckweed (Lemna aequinoctialis) exposed to streptomycin

et al. 2022

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“…Duckweed exposed to GO greatly enhanced Cd 2+ influx, resulting in increased Cd accumulation in fronds and roots, and an addition of GO to Cd-stressed plants downregulated phagosome pathway as well as some key proteins, such as Stx7, Rab7, and Tubastatin B, whereby GO and Cd were attached on the cell surface of duckweed. GO was found to be suitable to be used in phytoremediation of Cd-polluted waters by duckweed [ 219 ]. It should be noted that important changes in the structure of GO were observed at exposure to UV radiation (28–74 μW/cm 2 ; up to 120 h) manifested in eliminating −OH and C=O functional groups; such microstructural and compositional changes of GO can affect its stability and adsorption capacity at application in remediation of waters [ 250 ].…”

Section: Effects Of Gbns On Plantsmentioning

confidence: 99%

Advances in Biologically Applicable Graphene-Based 2D Nanomaterials

Jampílek

Kráľová

2022

IJMS

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Climate change and increasing contamination of the environment, due to anthropogenic activities, are accompanied with a growing negative impact on human life. Nowadays, humanity is threatened by the increasing incidence of difficult-to-treat cancer and various infectious diseases caused by resistant pathogens, but, on the other hand, ensuring sufficient safe food for balanced human nutrition is threatened by a growing infestation of agriculturally important plants, by various pathogens or by the deteriorating condition of agricultural land. One way to deal with all these undesirable facts is to try to develop technologies and sophisticated materials that could help overcome these negative effects/gloomy prospects. One possibility is to try to use nanotechnology and, within this broad field, to focus also on the study of two-dimensional carbon-based nanomaterials, which have excellent prospects to be used in various economic sectors. In this brief up-to-date overview, attention is paid to recent applications of graphene-based nanomaterials, i.e., graphene, graphene quantum dots, graphene oxide, graphene oxide quantum dots, and reduced graphene oxide. These materials and their various modifications and combinations with other compounds are discussed, regarding their biomedical and agro-ecological applications, i.e., as materials investigated for their antineoplastic and anti-invasive effects, for their effects against various plant pathogens, and as carriers of bioactive agents (drugs, pesticides, fertilizers) as well as materials suitable to be used in theranostics. The negative effects of graphene-based nanomaterials on living organisms, including their mode of action, are analyzed as well.

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“…However, the regulatory modules in monocot plants have not been studied in-depth. Duckweed, with the advantages of fast reproduction, high protein content [ 5 ], and tolerance for various toxic substances [ 6 , 7 ], has been applied as a monocotylous model plant for gene-expression systems. In duckweed, stable transformation mediated by Agrobacterium depends on efficient callus regeneration protocols.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of duckweed (Lemna turonifera) involves genetic molecular regulation and cyclohexane release

et al. 2022

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Plant regeneration is important for vegetative propagation, detoxification and the obtain of transgenic plant. We found that duckweed regeneration could be enhanced by regenerating callus. However, very little is known about the molecular mechanism and the release of volatile organic compounds (VOCs). To gain a global view of genes differently expression profiles in callus and regenerating callus, genetic transcript regulation has been studied. Auxin related genes have been significantly down-regulated in regenerating callus. Cytokinin signal pathway genes have been up-regulated in regenerating callus. This result suggests the modify of auxin and cytokinin balance determines the regenerating callus. Volatile organic compounds release has been analysised by gas chromatography/ mass spectrum during the stage of plant regeneration, and 11 kinds of unique volatile organic compounds in the regenerating callus were increased. Cyclohexane treatment enhanced duckweed regeneration by initiating root. Moreover, Auxin signal pathway genes were down-regulated in callus treated by cyclohexane. All together, these results indicated that cyclohexane released by regenerating callus promoted duckweed regeneration. Our results provide novel mechanistic insights into how regenerating callus promotes regeneration.

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Enhanced Cd accumulation by Graphene oxide (GO) under Cd stress in duckweed

Cited by 21 publications

References 24 publications

Physiological responses and antibiotic-degradation capacity of duckweed (Lemna aequinoctialis) exposed to streptomycin

Physiological responses and antibiotic-degradation capacity of duckweed (Lemna aequinoctialis) exposed to streptomycin

Advances in Biologically Applicable Graphene-Based 2D Nanomaterials

Regeneration of duckweed (Lemna turonifera) involves genetic molecular regulation and cyclohexane release

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