Mycorrhizal fungi influence on silver uptake and membrane protein gene expression following silver nanoparticle exposure

Noori, Azam; White, Jason C.; Newman, L.

doi:10.1007/s11051-016-3650-4

Cited by 50 publications

(19 citation statements)

References 56 publications

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“…Physicochemical properties of NPs (e.g., type, speciation, and size) strongly affect their impact on root mycorrhizal fungal colonization or nodulation. For example, Ag NPs seem to exhibit greater toxicity against mycorrhizas (Abd-Alla et al, 2016; Noori et al, 2017) compared with ZnO NPs (Li et al, 2015; Jing et al, 2016; Wang et al, 2016), considering their negative impact on root colonization at approximately 5−600 times lower concentrations in soil. Exposure to Fe 2 O 3 NPs at 6 g L –1 did not affect nodulation in a symbiosis between pea and Rhizobium leguminosarum.…”

Section: Nanoparticles Propertiesmentioning

confidence: 99%

“…Size of NPs was also found to influence NP-mycorrhiza interactions. Exposure to 2 nm-Ag NPs negatively affected root colonization in tomato, whereas a nil impact was observed for the larger Ag NPs of 15 nm at the same concentration of 12 mg kg –1 soil (Noori et al, 2017). Furthermore, TiO 2 NP types differing in their size and crystalline structure were shown to move differently in soil, and the soil spiked with E171-TiO 2 NPs (28 nm on average, consists of both anatase and rutile phases) had substantially elevated concentrations of Ti in the microcosm leachates compared with P25-TiO 2 NPs (91 nm on average, consists of only anatase) (Klingenfuss, 2014), suggesting that NPs size and structure can potentially affect their bioavailability for soil microbes such as mycorrhizal fungi.…”

Section: Nanoparticles Propertiesmentioning

confidence: 99%

“…The net effect of NPs on development of mycorrhizal and rhizobial symbioses appear to be highly context-driven. While several studies indicated detrimental effects of NPs on mycorrhizal and rhizobial associations (Huang et al, 2014; Abd-Alla et al, 2016; Jing et al, 2016; Wang et al, 2016; Noori et al, 2017), there are also reports on the stimulatory impact of NPs (Feng et al, 2013; Chen et al, 2017), suggesting potentials to be harnessed for these beneficial root-microbe symbioses. Figure 3 displays routes by which mycorrhizal fungi and rhizobia may encounter NPs in soil, and the possible context-dependent consequences.…”

Section: Introductionmentioning

confidence: 99%

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Are Nanoparticles a Threat to Mycorrhizal and Rhizobial Symbioses? A Critical Review

2019

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Soil microorganisms can be exposed to, and affected by, nanoparticles (NPs) that are either purposely released into the environment (e.g., nanoagrochemicals and NP-containing amendments) or reach soil as nanomaterial contaminants. It is crucial to evaluate the potential impact of NPs on key plant-microbe symbioses such as mycorrhizas and rhizobia, which are vital for health, functioning and sustainability of both natural and agricultural ecosystems. Our critical review of the literature indicates that NPs may have neutral, negative, or positive effects on development of mycorrhizal and rhizobial symbioses. The net effect of NPs on mycorrhizal development is driven by various factors including NPs type, speciation, size, concentration, fungal species, and soil physicochemical properties. As expected for potentially toxic substances, NPs concentration was found to be the most critical factor determining the toxicity of NPs against mycorrhizas, as even less toxic NPs such as ZnO NPs can be inhibitory at high concentrations, and highly toxic NPs such as Ag NPs can be stimulatory at low concentrations. Likewise, rhizobia show differential responses to NPs depending on the NPs concentration and the properties of NPs, rhizobia, and growth substrate, however, most rhizobial studies have been conducted in soil-less media, and the documented effects cannot be simply interpreted within soil systems in which complex interactions occur. Overall, most studies indicating adverse effects of NPs on mycorrhizas and rhizobia have been performed using either unrealistically high NP concentrations that are unlikely to occur in soil, or simple soil-less media (e.g., hydroponic cultures) that provide limited information about the processes occurring in the real environment/agrosystems. To safeguard these ecologically paramount associations, along with other ecotoxicological considerations, large-scale application of NPs in farming systems should be preceded by long-term field trials and requires an appropriate application rate and comprehensive (preferably case-specific) assessment of the context parameters i.e., the properties of NPs, microbial symbionts, and soil. Directions and priorities for future research are proposed based on the gaps and experimental restrictions identified.

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Section: Nanoparticles Propertiesmentioning

confidence: 99%

Section: Nanoparticles Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Are Nanoparticles a Threat to Mycorrhizal and Rhizobial Symbioses? A Critical Review

2019

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“…More than eighty percent of terrestrial plants are in a symbiotic relationship with arbuscular mycorrhizal (AM) fungi [ 34 , 35 ]. As a consequence of AM colonization, fungi help nourish plants with water and nutrients, promote host resistance to biotic and abiotic stress, and consequently improve overall plant productivity and health [ 36 – 40 ]. The mycorrhizal colonization technique has been carefully introduced in agriculture to provide benefits to cultivated plants, which involves improving plant metabolism, producing secondary metabolites and helping to improve and maintain an optimal soil texture [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

“…Several investigations on plants inoculated with mycorrhizae under the impact of bulk metals have demonstrated that host plants were protected against HM stress and toxicity [ 45 , 46 ]. Mycorrhizal colonization facilitates phytoremediation by promoting the growth of hyperaccumulating plants [ 40 , 47 , 48 ]. However, because of the distinctive physico-chemical characteristics of metal or metal oxide nanoparticles, the impact of these materials could have an inhibitory effect on plant colonization by AM fungi [ 49 ].…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal strategy for zinc mycoremediation and diminished translocation to shoots and grains in wheat

2017

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Mycoremediation is an on-site remediation strategy, which employs fungi to degrade or sequester contaminants from the environment. The present work focused on the bioremediation of soils contaminated with zinc by the use of a native mycorrhizal fungi (AM) called Funneliformis geosporum (Nicol. & Gerd.) Walker & Schüßler. Experiments were performed using Triticum aestivum L. cv. Gemmeza-10 at different concentrations of Zn (50, 100, 200 mg kg-1) and inoculated with or without F. geosporum. The results showed that the dry weight of mycorrhizal wheat increased at Zn stressed plants as compared to the non-Zn-stressed control plants. The concentrations of Zn also had an inhibitory effect on the yield of dry root and shoot of non-mycorrhizal wheat. The photosynthetic pigment fractions were significantly affected by Zn treatments and mycorrhizal inoculation, where in all treatments, the content of the photosynthetic pigment fractions decreased as the Zn concentration increased in the soil. However, the level of minerals of shoots, roots, and grains was greatly influenced by Zn-treatment and by inoculation with F. geosporum. Treatment with Zn in the soil increased Cu and Zn concentrations in the root, shoot and grains, however, other minerals (P, S, K, Ca and Fe) concentration was decreased. Inoculation of wheat with AM fungi significantly reduced the accumulation of Zn and depressed its translocation in shoots and grains of wheat. In conclusion, inoculation with a native F. geosporum-improves yields of wheat under higher levels of Zn and is possible to be applied for the improvement of zinc contaminated soil.

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Nanotechnology: Advances in Plant and Microbial Science

2021

Nano‐Technological Intervention in Agricultural Productivity

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Mycorrhizal fungi influence on silver uptake and membrane protein gene expression following silver nanoparticle exposure

Cited by 50 publications

References 56 publications

Are Nanoparticles a Threat to Mycorrhizal and Rhizobial Symbioses? A Critical Review

Are Nanoparticles a Threat to Mycorrhizal and Rhizobial Symbioses? A Critical Review

Arbuscular mycorrhizal strategy for zinc mycoremediation and diminished translocation to shoots and grains in wheat

Nanotechnology: Advances in Plant and Microbial Science

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