Arbuscular Mycorrhizal Fungal Infectivity in Two Soils as Affected by Atmospheric Phenanthrene Pollution

Desalme, Dorine; Chiapusio, Geneviève; Bernard, Nadine; Gilbert, Daniel; Toussaint, Marie‐Laure; Binet, Philippe

doi:10.1007/s11270-012-1110-z

Cited by 6 publications

(7 citation statements)

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“…According to prior studies, any factors responsible for modifying physicochemical features in soil could eventually mete out harmful impacts on the structural and functional diversity of the soil microbiota (Kaushal and Wani, 2016;Awet et al, 2018;Qi et al, 2018;Rillig and Bonkowski, 2018;Wan et al, 2019;Yi et al, 2020). Accordingly, soil pollutants inflict detrimental effects on AMF by reducing their potential to colonize, infect roots, and develop arbuscules and spores (Desalme et al, 2012;Ferrol et al, 2016). The present findings too showed a negative effect of MPs on the abundance of AMF spores.…”

Section: Discussionsupporting

confidence: 57%

Potential impacts of two types of microplastics on <em>Solanum lycopersicum</em> L. and arbuscular mycorrhizal fungi

Weerasinghe

Madawala

2022

Ceylon J. Sci.

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Microplastics (MPs) in agricultural soils are a major concern. Relatively few studies have been carried out to explore its potential impacts on crops and soil microbiota. The study investigates the effects of two different types of MPs (microfiber, MFB and microfilms, and MFL) on the growth of Solanum lycopersicum L. (tomato) and Arbuscular Mycorrhizal Fungi (AMF). A pot experiment was conducted with MFB and MFL concentrations viz., 0.4, 2.4, 4.4, 6.4, and 8.4% (w/w) and control without MPs (n = 6). Plant height was measured weekly for 13 wk before plants were harvested destructively. Growth increment, relative growth rate (RGR), and root: shoot ratio (RSR) were calculated. Leaf chlorophyll levels were measured. AMF spores were quantified using the wet sieving and decanting method. Plants showed a concentration-dependent decline in growth, regardless of the MP type. RSR demonstrated a decline with increasing MP concentration. Compared to the control, plants declined the allocation of shoot biomass by 40-74% and root by 6-75%. Plants in MFBs reported a higher chlorophyll content than in MFLs (F = 18.33; p ≤ 0.000). MPs significantly reduced AMF spore abundance in soils, indicating adverse effects on the soil microbiota. The study concluded that MPs impose negative effects on both vegetative growth of tomato and AMF spores. Further studies are imperative to explore the link between MPs and, crop growth and AMF.

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Section: Discussionsupporting

confidence: 57%

Potential impacts of two types of microplastics on <em>Solanum lycopersicum</em> L. and arbuscular mycorrhizal fungi

Weerasinghe

Madawala

2022

Ceylon J. Sci.

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“…In a previous experiment, two types of soil with different physicochemical properties were exposed to atmospheric PHE pollution in the same conditions. The resulting PHE concentrations differed significantly because they were affected by different loss processes …”

Section: Resultsmentioning

confidence: 86%

“…The resulting PHE concentrations differed significantly because they were affected by different loss processes. 39 Relevance of These EC Experiments to Real Environmental Conditions. Exposure experiments using this EC are especially relevant to real environment conditions in the range of concentrations set in its atmosphere (23−83 μg.m −3 ) and recovered in topsoils (9−189 μg.g −1 dry soil), and the contamination method (continuous atmospheric deposition of pure PAHs).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Soil consists of a solid matrix partially filled with water; consequently, accurate determination of PHE adsorption requires a complex model including conjugate momentum and PHE transfers between air, water, and the solid matrix. Regarding the relative stability of the humidity level in the soil (daily water supply) and previous experimental results of PHE adsorption in soils in the exposure chambers, we chose a simple model with a constant sink term per volume unit ( S PHE = 9.76 × 10 –12 kg m –3 s –1 ) in the PHE transport equation. The Darcy law for low porosity media was applied: ∂ p ∂ x j = μ K u j where p (N.m –2 ) is the pressure, μ the dynamic viscosity of air (μ = 1.8 × 10 –5 kg.m –1 .s –1 ), and K the permeability of the soil ( K = 5 × 10 –11 m 2 ), following Kaviany …”

Section: Mathematical Background On Computational Fluid Dynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Exposure Chambers for Studying the Partitioning of Atmospheric PAHs in Environmental Compartments: Validation and Calibration Using Experimental and Computational Approaches

Desalme

Roy

Binet

et al. 2013

Environ. Sci. Technol.

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The environmental partitioning of atmospheric polycyclic aromatic hydrocarbons (PAHs) conditions their entry into food chains and subsequent risks for human health. The need for new experimental exposure devices for elucidating the mechanisms governing ecosystemic PAH transfer motivated the elaboration of an original small-scale exposure chamber (EC). A dual approach pairing experimentation and computational fluid dynamics (CFD) was selected to provide comprehensive validation of this EC as a tool to study the transfer and biological effects of atmospheric PAH pollution in microsystems. Soil samples and passive air samplers (PASs) were exposed to atmospheric pollution by phenanthrene (PHE), a gaseous PAH, for 2 weeks in examples of the EC being tested, set up under different conditions. Dynamic concentrations of atmospheric PHE and its uptake by PASs were simulated with CFD, results showing homogeneous distribution and constant atmospheric PHE concentrations inside the ECs. This work provides insight into the setting of given concentrations and pollution levels when using such ECs. The combination of experimentation and CFD is a successful ECs calibration method that should be developed with other semivolatile organic pollutants, including those that tend to partition in the aerosol phase.

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“…Although AMF exhibit a certain tolerance to heavy metals and hydrocarbons, and can even assist in reducing their toxicity to plants, they are negatively affected at high concentrations ( Cabello, 1997 ; Ferrol et al, 2016 ). Typical reactions of AMF to soil pollutants include reduced root colonization and infectivity, reduced arbuscule and spore numbers or cell damage ( Cabello, 1997 ; Leyval et al, 1997 ; Desalme et al, 2012 ; Ferrol et al, 2016 ). Pharmaceuticals like antibiotics can exhibit mycotoxicity for AMF as well, reducing hyphal length and spore numbers ( Hillis et al, 2008 ).…”

Section: Hypothesized Direct Effects Of Microplastic On Amfmentioning

confidence: 99%

Potential Effects of Microplastic on Arbuscular Mycorrhizal Fungi

2021

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Microplastics (MPs) are ubiquitously found in terrestrial ecosystems and are increasingly recognized as a factor of global change (GCF). Current research shows that MP can alter plant growth, soil inherent properties, and the composition and activity of microbial communities. However, knowledge about how microplastic affects arbuscular mycorrhizal fungi (AMF) is scarce. For plants it has been shown that microplastic can both increase and decrease the aboveground biomass and reduce the root diameter, which could indirectly cause a change in AMF abundance and activity. One of the main direct effects of microplastic is the reduction of the soil bulk density, which translates to an altered soil pore structure and water transport. Moreover, especially fibers can have considerable impacts on soil structure, namely the size distribution and stability of soil aggregates. Therefore, microplastic alters a number of soil parameters that determine habitat space and conditions for AMF. We expect that this will influence functions mediated by AMF, such as soil aggregation, water and nutrient transport. We discuss how the impacts of microplastic on AMF could alter how plants deal with other GCFs in the context of sustainable food production. The co-occurrence of several GCFs, e.g., elevated temperature, drought, pesticides, and microplastic could modify the impact of microplastic on AMF. Furthermore, the ubiquitous presence of microplastic also relates to earth system processes, e.g., net primary production (NPP), carbon and nitrogen cycling, which involve AMF as key soil organisms. For future research, we outline which experiments should be prioritized.

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Arbuscular Mycorrhizal Fungal Infectivity in Two Soils as Affected by Atmospheric Phenanthrene Pollution

Cited by 6 publications

References 46 publications

Potential impacts of two types of microplastics on <em>Solanum lycopersicum</em> L. and arbuscular mycorrhizal fungi

Potential impacts of two types of microplastics on <em>Solanum lycopersicum</em> L. and arbuscular mycorrhizal fungi

Exposure Chambers for Studying the Partitioning of Atmospheric PAHs in Environmental Compartments: Validation and Calibration Using Experimental and Computational Approaches

Potential Effects of Microplastic on Arbuscular Mycorrhizal Fungi

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