Effects of Fe/SDS and Au nanoparticles on
            <i>P. aeruginosa</i>
            bacterial growth and biosurfactant production

Alamdar, Neda; Rasekh, Behnam; Yazdian, Fatemeh

doi:10.1049/iet-nbt.2016.0260

Cited by 11 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 and 4). Alamdar, Rasekh & Yazdian (2018) reported increase in growth and biosurfactant production when bacterial strains were treated with SDS nanoparticles at a concentration of 1 mg/ml and have shown no side effect at this concentration. Ethylenediaminetetraacetic acid also improved auxin production potential.…”

Section: Discussionmentioning

confidence: 94%

Bacillus spp.: potent microfactories of bacterial IAA

Wagi

Ahmed

2019

PeerJ

113

View full text Add to dashboard Cite

Background Auxin production by bacteria is one of the most important direct mechanisms utilized by plant growth-promoting bacteria (PGPB) for the betterment of plants naturally because auxin is a plant friendly secondary metabolite synthesized naturally by bacteria, and hence improves the growth of associated plants. So, the current study focuses on bacterial synthesis of Indole-3-acetic acid (IAA) for plant growth improvement. Methods In the current study, the PGPB were selected on the basis of their auxin production potential and their growth promoting attributes were evaluated. Indole-3-acetic acid producing potential of two selected bacterial isolates was observed by varying different growth conditions i.e., media composition, carbon sources (glucose, sucrose and lactose) and different concentrations of precursor. Influence of various physiological factors (temperature and incubation time period) on IAA production potential was also evaluated. Results Both the bacterial strains Bacillus cereus (So3II) and B. subtilis (Mt3b) showed variable potential for the production of bacterial IAA under different set of growth and environmental conditions. Hence, the IAA production potential of the bacterial isolates can be enhanced by affecting optimum growth conditions for bacterial isolates and can be used for the optimal production of bacterial IAA and its utilization for plant growth improvement can lead to better yield in an eco-friendly manner.

show abstract

Section: Discussionmentioning

confidence: 94%

Bacillus spp.: potent microfactories of bacterial IAA

Wagi

Ahmed

2019

PeerJ

113

View full text Add to dashboard Cite

show abstract

“…Several studies investigated the effect of different nanoparticles on the rate of biosurfactant production by different bacteria [59, 60]. The research of Alamdar et al., showed that, the effect of nanoparticles on the bacterial growth and biosurfactant production varied corresponding to the type and concentration of nanoparticles [50]. In this study, effect of starch‐coated Fe 0 and Fe 3+ nanoparticles on the biomass and biosurfactant production of B. subtilis was investigated.…”

Section: Discussionmentioning

confidence: 99%

“…In the similar study, the effect of Fe/SDS and Au nanoparticles on growth rate and biosurfactant production for application in oil industry was investigated. The results showed that low concentrations of nanoparticles Fe/SDS and Au have positive effects on bacterial biosurfactant production and suggested that they could serve as a good alternative to chemical surfactants for petroleum industry [50].…”

Section: Discussionmentioning

confidence: 99%

“…Optimal concentration 1 mg/L of starch‐coated Fe 0 and Fe 3+ nanoparticles was added to culture media. At 48, 72, 96 h after growth, samples were taken from the culture medium, and beta hemolysis, biomass, surfactant production, and surface tension reduction tests were performed to evaluate surfactin production [50]. From each sample, three repetitions were done and the average of the three replicates is listed.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Surfactin production in the bioreactor: Emphasis on magnetic nanoparticles application

Modabber

Sepahi

Yazdian

et al. 2020

Engineering in Life Sciences

Self Cite

View full text Add to dashboard Cite

Surfactin is one of the main lipopeptide biosurfactants produced by different species of Bacillus subtilis. This study aims to analyze the effect of starch‐coated Fe0 and Fe3+ nanoparticles on the biomass and biosurfactant production of Bacillus subtilis. Out of 70 soil samples, 20 Bacillus were isolated and genome sequenced by biochemical methods and 16S rRNA gene. Quantitative and qualitative screening methods were used to isolate and detect biosurfactant production. For the aim of this study, 61 and 63 (Bacillus subtilis subsp. Inaquosorum) were selected. Then, hemolytic activity, biomass amount, surfactant production, and reduction of surface tension in Minimal Salt Medium containing Fe0 and Fe3+ nanoparticles were examined after 48, 72, and 96 h of culture. Strain 61 was the best bacterium and Fe3+ was the best nanoparticle. The results were compared with the results of non‐nanoparticle bioreactor. The results showed the amount of biomass, surfactin, and surface tension decrease, 72 h after growth in 61 strain containing Fe3+ reached the highest values. Surfactin from strain 61 culture in the Fe3+nanoparticle bioreactor after 72 h of growth showed higher production than the same strain culture after 72 h without Fe3+, if continuing the research, this strain can be commercialized in the future.

show abstract

“…Numerous studies have shown that NPs can improve antimicrobial, anticorrosion, and antitumor functionalities through silver NPs [17], copper NPs [1, 18], and LDH NPs [19]. Moreover, other studies have shown that NPs can improve the growth of bacterial cells and their production of metabolites [20–22]. Specifically, NP aggregates can attach to and/or entrap cells, thereby impacting their cellular functions.…”

Section: Introductionmentioning

confidence: 99%

Characterization and mechanism of the effects of Mg–Fe layered double hydroxide nanoparticles on a marine bacterium: new insights from genomic and transcriptional analyses

Ren

Ding²,

Gu³

et al. 2019

Biotechnol Biofuels

View full text Add to dashboard Cite

Background Layered double hydroxides (LDHs) have received widespread attention for their potential applications in catalysis, polymer nanocomposites, pharmaceuticals, and sensors. Here, the mechanism underlying the physiological effects of Mg–Fe layered double hydroxide nanoparticles on the marine bacterial species Arthrobacter oxidans KQ11 was investigated. Results Increased yields of marine dextranase (Aodex) were obtained by exposing A. oxidans KQ11 to Mg–Fe layered double hydroxide nanoparticles (Mg–Fe-LDH NPs). Furthermore, the potential effects of Mg–Fe-LDH NPs on bacterial growth and Aodex production were preliminarily investigated. A. oxidans KQ11 growth was not affected by exposure to the Mg–Fe-LDH NPs. In contrast, a U-shaped trend of Aodex production was observed after exposure to NPs at a concentration of 10 μg/L–100 mg/L, which was due to competition between Mg–Fe-LDH NP adsorption on Aodex and the promotion of Aodex expression by the NPs. The mechanism underling the effects of Mg–Fe-LDH NPs on A. oxidans KQ11 was investigated using a combination of physiological characterization, genomics, and transcriptomics. Exposure to 100 mg/L of Mg–Fe-LDH NPs led to NP adsorption onto Aodex, increased expression of Aodex , and generation of a new Shine-Dalgarno sequence (GGGAG) and sRNAs that both influenced the expression of Aodex . Moreover, the expressions of transcripts related to ferric iron metabolic functions were significantly influenced by treatment. Conclusions These results provide valuable information for further investigation of the A. oxidans KQ11 response to Mg–Fe-LDH NPs and will aid in achieving improved marine dextranase production, and even improve such activities in other marine microorganisms. Electronic supplementary material The online version of this article (10.1186/s13068-019-1528-2) contains supplementary material, which is available to authorized users.

show abstract

Effects of Fe/SDS and Au nanoparticles on P. aeruginosa bacterial growth and biosurfactant production

Cited by 11 publications

References 20 publications

Bacillus spp.: potent microfactories of bacterial IAA

Bacillus spp.: potent microfactories of bacterial IAA

Surfactin production in the bioreactor: Emphasis on magnetic nanoparticles application

Characterization and mechanism of the effects of Mg–Fe layered double hydroxide nanoparticles on a marine bacterium: new insights from genomic and transcriptional analyses

Contact Info

Product

Resources

About