Oxidative stress in bacteria (Pseudomonas putida) exposed to nanostructures of silicon carbide

Borkowski, Andrzej; Szala, Mateusz; Kowalczyk, Paweł; Cłapa, Tomasz; Narożna, Dorota; Selwet, Marek

doi:10.1016/j.chemosphere.2015.04.066

Cited by 15 publications

(9 citation statements)

References 22 publications

(30 reference statements)

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“…However, interaction of nutrient with the bacterium increases antioxidant enzyme activity (ISRAR et al, 2016), as occurred in this study. Similar results were observed by Borkowski et al (2015), while analyzing the oxidative stress in bacteria (Pseudomonas sp.) exposed to silicon carbide nanostructures.…”

Section: Figure3 Chlorophyll a B And Total In Lettuce Plant Leaves supporting

confidence: 85%

Combined effect of Pseudomonas sp. and Trichoderma aureoviride on lettuce growth promotion

Filho¹,

Medeiros²,

Barbosa³

et al. 2019

Biosci. J.

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Plant growth promotion by microorganisms may be a viable alternative to increase lettuce production through pathogens control and nutrients absorption increase. Trichoderma and Pseudomonas genus are examples of widely studied microorganisms with the capacity to promote plant growth. However, there are still gaps regarding the action of the combined effect of these two microorganisms. Therefore, the objective of this study was to evaluate the combined effect of Pseudomonas sp. UAGF14 and Trichoderma aureoviride URM5158 on the development of lettuce plants. The experimental design was completely randomized, with five treatments: CONT (control), CM (soil with organic fertilization), CMB (soil with organic fertilization and Pseudomonas sp.), CMF (soil with organic fertilization and T. aureoviride), and CMFB (soil with organic fertilization, Pseudomonas sp. and T. aureoviride), with ten repetitions. At 30, 40 and 60 days after sowing, the following parameters were analyzed: plant and canopy height and number of leaves. At 60 days after emergence, shoot dry matter, leaf area, root dry matter, root length and chlorophyll were analyzed. Catalase, peroxidase and polyphenol oxidase enzymatic activity were determined. The CMFB treatment had the highest means of lettuce growth promotion, confirming the synergistic effect of the combination of the two microorganism types, as it increased height, canopy, shoot and root dry matter, and chlorophyll levels compared to CONT, although did not differ from CM in some variables. Enzymatic activity was also influenced by the action of these microorganisms combined, evidencing by polyphenol oxidase increase. The CMFB or CM were efficient in promoting lettuce growth, showing positive response to the plant morphological and physiological characteristics. However, few responses were observed in lettuce plant growth in the first cycle evaluated after 60 days, compared CM and CMFB treatments, but both treatments showed superiority in lettuce plant growth submitted to CONT treatment. Therefore, further studies are needed to estimate the long-term effects of combined effect of Pseudomonas sp. UAGF14 and T. aureoviride URM5158 on crop productivity in field conditions.

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Section: Figure3 Chlorophyll a B And Total In Lettuce Plant Leaves supporting

confidence: 85%

Combined effect of Pseudomonas sp. and Trichoderma aureoviride on lettuce growth promotion

Filho¹,

Medeiros²,

Barbosa³

et al. 2019

Biosci. J.

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“…In a normal physiological state, such dyes are removed from cells. Contact with the nanostructures may lead to mechanical damage, as was often demonstrated in the case of single- and multi-walled carbon nanotubes [11,30], or on SiC in the form of nanofibers and nanorods [9,10]. In this study, an interesting effect was noted.…”

Section: Resultssupporting

confidence: 55%

“…In this method, after product purification, a material can be produced that consists almost exclusively of nanostructured SiC. Nanofibers, nanorods, and SiC nanoparticles can exhibit antibacterial properties by injury of cell membrane integrity and generation of oxidative stress [7,8,9,10]. Such a bactericidal mechanism has been observed with various nanostructured materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of SiC/Ag/Cellulose Nanocomposite and Its Antibacterial Activity by Reactive Oxygen Species Generation

et al. 2016

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We describe the synthesis of nanocomposites, based on nanofibers of silicon carbide, silver nanoparticles, and cellulose. Silver nanoparticle synthesis was achieved with chemical reduction using hydrazine by adding two different surfactants to obtain a nanocomposite with silver nanoparticles of different diameters. Determination of antibacterial activity was based on respiration tests. Enzymatic analysis indicates oxidative stress, and viability testing was conducted using an epifluorescence microscope. Strong bactericidal activity of nanocomposites was found against bacteria Escherichia coli and Bacillus cereus, which were used in the study as typical Gram-negative and Gram-positive bacteria, respectively. It is assumed that reactive oxygen species generation was responsible for the observed antibacterial effect of the investigated materials. Due to the properties of silicon carbide nanofiber, the obtained nanocomposite may have potential use in technology related to water and air purification. Cellulose addition prevented silver nanoparticle release and probably enhanced bacterial adsorption onto aggregates of the nanocomposite material.

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“…[7][8][9][10][11][12][13][14][15][16] Similarly, nanomaterials can also exhibit toxic properties. [17][18][19][20][21][22] However, studies concerning the toxicity of ILs and nanomaterials are usually conducted separately. The surface properties of nanomaterials can be affected by amphiphilic compounds, which can in turn cause changes of sensitivities toward microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquids strongly affect the interaction of bacteria with magnesium oxide and silica nanoparticles

2019

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Oxidative stress in bacteria (Pseudomonas putida) exposed to nanostructures of silicon carbide

Cited by 15 publications

References 22 publications

Combined effect of Pseudomonas sp. and Trichoderma aureoviride on lettuce growth promotion

Combined effect of Pseudomonas sp. and Trichoderma aureoviride on lettuce growth promotion

Synthesis of SiC/Ag/Cellulose Nanocomposite and Its Antibacterial Activity by Reactive Oxygen Species Generation

Ionic liquids strongly affect the interaction of bacteria with magnesium oxide and silica nanoparticles

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