Effects of Nanoparticles on Plant Growth-Promoting Bacteria in Indian Agricultural Soil

Chavan, Sangeeta; Vigneshwaran, N.

doi:10.3390/agronomy9030140

Cited by 67 publications

(30 citation statements)

References 100 publications

(122 reference statements)

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“…5a). The result is consistent with other studies in which ZnO nanoparticles caused in a decrease in abundance of soil bacterial community [22], and bacterial load in plate counts of soil samples [23]. However, the effect of ZnO nanoparticles on rhizosphere bacterial abundance was concentration and soil type dependent.…”

Section: Influence On the Formation Of Pods And Nodulessupporting

confidence: 92%

Impact of Zinc Oxide Nanoparticles Amended Organic Manure on Arachis hypogaea Growth Response and Rhizosphere Bacterial Community

Oghenerume

Eduok

Ita

et al. 2020

IJPSS

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The effect of zinc oxide nanoparticle-organic manure amended ultisol and loam soils on plant growth response and rhizosphere bacterial community of peanut (Arachis hypogaea) was evaluated using standard methods under greenhouse conditions. Results indicate germination rates ranged between 30 and 100% in the amended soils compared to 50 and 70% in the controls. ZnO nanoparticles exerted concentration-dependent and varying effects on the plant root and shoot lengths, weights, nodules and pod formation in the two soil types. Heterotrophic bacterial counts ranged from 7.21 ± 0.51 to 7.38 ± 0.5 Log10CFUg-1 in the amended ultisol and 6.99 ± 0.55 Log10CFUg-1 in the control with a log reduction to 6.70 ± 0.39 Log10CFUg-1 in 500 mgkg⁻¹ ZnO spiked soil. Counts in the amended loam soil ranged between 6.59 ± 0.48 and 7.22 ± 0.41 Log10CFUg-1 relative to 6.80 ± 0.58 Log10CFUg-1 in the control. ZnO induced concentration-dependent effect on oxygen uptake rate relative to the controls. The organisms were members of the genera Lactobacillus, Pseudomonas, Bacillus, Rhizobium, Xanthobacter, Enterobacter, Citrobacter, Nitrosomonas and Agromyces. ZnO nanoparticle exerted concentration-dependent stimulatory and inhibitory effects on the plant growth response, oxygen uptake rate and induced temporal shifts in soil microbial abundance. It is challenging to generalize a consistent response of the plant or microorganisms because ZnO nanoparticles interacted with A. hypogaea and soil bacterial community in ways that differ in the ultisol and loam soil.

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Section: Influence On the Formation Of Pods And Nodulessupporting

confidence: 92%

Impact of Zinc Oxide Nanoparticles Amended Organic Manure on Arachis hypogaea Growth Response and Rhizosphere Bacterial Community

Oghenerume

Eduok

Ita

et al. 2020

IJPSS

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“…5a). The result is consistent with other studies where ZnO nanoparticles caused in a decrease in abundance of soil bacterial community [45]. ZnO nanoparticles exerted inhibitory effect on soil bacterial population by the release of zinc ions (Zn 2+ ) to induce oxidative stress, cell membrane damage and cytoplasmic leakage [46].…”

Section: Influence Of Zno Nanoparticles On Total Heterotrophic Bactersupporting

confidence: 92%

Influence of Zinc Oxide Nanoparticles on Soil Physicochemical Properties and Arachis hypogea Rhizosphere Microbial Community

Oghenerume¹,

Eduok²,

Ita³

et al. 2020

IJPSS

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We evaluated the effect of 4000 mg zinc oxide (ZnO, 99%, 30 nm) nanoparticle on the physicochemical and microbiological properties of organic manure amended ultisol and loam soil cultivated with Arachis hypogaea using standard methods. The results indicate varying effects on the physicochemical properties in relation to the soil type. The pH of the control ultisol at 7.85 ± 0.17 and 8.3 ± 0.12 in the amended ultisol whereas, the control loam was 7.15 ± 0.17 and 7.41 ± 0.11 in the amended soil indicating 1.06- and 1.04-times higher difference than the controls respectively. Phosphorus concentration at 57.82 ± 0.54%, 50.81 ± 0.22% and 55.97 ± 0.04%, 59.97 ± 0.02% was 1.14 times lower in the ZnO amended ultisol and 1.07 times higher in amended loam soil compared to the respective controls. The organic matter content in the control and amended ultisol was 2.28 ± 0.32% and 0.91 ± 0.02%, 3.68 ± 0.36% and 0.36 ± 0.02% in the control and amended loam soil. The concentration of nitrate in the control ultisol was 0.05 ± 0.01% and 0.03 ± 0.01% in the amended soil. The nitrate in the control loam soil was 0.08 ± 0.01% relative to 0.02 ± 0.01% in the treated soil and these differences were significant at p = 0.05. The concentration of nutritive salts was reduced and in contrast iron, copper, exchangeable acids, exchange capacity, clay and silt increased in the amended soils. Further to this, heterotrophic ammonia and nitrate-oxidizing bacterial population were inhibited in the amended soils and denitrifying organisms were stimulated. The organisms were members of the genera Pseudomonas, Xanthobacter, Enterobacter, Bacillus, Lactobacillus, Citrobacter, Nitrosomonas, Agromyces and Rhizobium. ZnO nanoparticles altered the soil physicochemical properties which exacerbated the negative effect on microbial abundance and varied with the soil type.

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“…AgNPs showed bactericidal effects at lower concentrations of 2-22 µg/mL whereas ZnONPs showed a bacteriostatic effects up to concentrations of 3000 µg/mL in some cases. Moreover, AgNPs significantly changed the bacterial community in soil [192]. Another study assessed the toxicity of ZnONPs and CeO 2 NPs against Sinorhizobium meliloti, a symbiotic alfalfa inhabiting bacterium using advanced microscopic and spectroscopic techniques.…”

Section: Toxicity Of Metallic Nanoparticles On Beneficial Microbes Asmentioning

confidence: 99%

Advancements in Plant and Microbe-Based Synthesis of Metallic Nanoparticles and Their Antimicrobial Activity against Plant Pathogens

et al. 2020

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A large number of metallic nanoparticles have been successfully synthesized by using different plant extracts and microbes including bacteria, fungi viruses and microalgae. Some of these metallic nanoparticles showed strong antimicrobial activities against phytopathogens. Here, we summarized these green-synthesized nanoparticles from plants and microbes and their applications in the control of plant pathogens. We also discussed the potential deleterious effects of the metallic nanoparticles on plants and beneficial microbial communities associated with plants. Overall, this review calls for attention regarding the use of green-synthesized metallic nanoparticles in controlling plant diseases and clarification of the risks to plants, plant-associated microbial communities, and environments before using them in agriculture.

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Effects of Nanoparticles on Plant Growth-Promoting Bacteria in Indian Agricultural Soil

Cited by 67 publications

References 100 publications

Impact of Zinc Oxide Nanoparticles Amended Organic Manure on Arachis hypogaea Growth Response and Rhizosphere Bacterial Community

Impact of Zinc Oxide Nanoparticles Amended Organic Manure on Arachis hypogaea Growth Response and Rhizosphere Bacterial Community

Influence of Zinc Oxide Nanoparticles on Soil Physicochemical Properties and Arachis hypogea Rhizosphere Microbial Community

Advancements in Plant and Microbe-Based Synthesis of Metallic Nanoparticles and Their Antimicrobial Activity against Plant Pathogens

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