Mycorrhizal Infection Can Ameliorate Abiotic Factors in Urban Soils

Balacco, Jennifer; Vaidya, Bhagyashree P.; Hagmann, Diane F.; Goodey, Nina M.; Krumins, Jennifer Adams

doi:10.1007/s00248-021-01945-y

Cited by 6 publications

(2 citation statements)

References 46 publications

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“…All three strains in that study seemed to accumulate Pb, but the reference strain was more negatively affected by the substrate Pb concentration, which was quite high. Given that AMF inoculants are popular and show various other benefits when used in highly disturbed soils (Balacco et al., 2023; Delavaux et al., 2017), more work is needed to ascertain how the management of AMF by encouraging local populations or introducing new strains could play a role in crop safety.…”

Section: Discussionmentioning

confidence: 99%

Mycorrhizal fungi and soil factors influence toxic element uptake in urban grown produce

Bowdish

Duran

Richardson

et al. 2023

Urban Agric & Regnl Food Sys

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Despite the need for more urban‐grown produce, toxic elements contaminated soils continue to be a major barrier to food production and food sovereignty in urban areas and a continued health and environmental justice issue. Although the US EPA provides recommendations regarding levels of soil lead that are safe for gardening, soil abiotic and biotic factors as well as plant identity play a major role in determining the actual crop uptake of toxic elements. This study evaluated the role of crop identity, harvested tissue, and soil factors, including arbuscular mycorrhizal (AM) fungi on crop uptake of lead (Pb) and arsenic (As) in an urban community farm. Crop species varied in their Pb and As accumulations, both by crop identity and also by plant tissue. Crop uptake of lead increased with lower soil pH (range 5.3–6.9) and lower soil P (range 365–1771 mg kg−1 total P). For mycorrhizal crops, greater intensity of AM fungal colonization and the prevalence of arbuscules were associated with greater lead uptake, but the presence of more storage vesicles was related to less As uptake into leaves. These findings can help inform crop selection and soil management to improve soil stabilization of toxic elements in moderately contaminated soils while serving as a platform for community conversations about the importance of soil management in healthy urban food production.

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Section: Discussionmentioning

confidence: 99%

Mycorrhizal fungi and soil factors influence toxic element uptake in urban grown produce

Bowdish

Duran

Richardson

et al. 2023

Urban Agric & Regnl Food Sys

View full text Add to dashboard Cite

show abstract

“…Thus, different groups of bacteria could survive at high or low Pb levels. Plants can accumulate lead as well if associated with rhizospheric bacteria or mycorrhizal fungi [ 74 , 75 ]. Fungi on the contrary are a versatile biosorption group [ 76 , 77 ] and have the ability to potentially bind and bioaccumulate lead, which may have contributed to their general tolerance to Pb at the “Bowtie” brownfield site.…”

Section: Discussionmentioning

confidence: 99%

Soil Microbial Community Composition and Tolerance to Contaminants in an Urban Brownfield Site

et al. 2022

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Brownfields are unused sites that contain hazardous substances due to previous commercial or industrial use. The sites are inhospitable for many organisms, but some fungi and microbes can tolerate and thrive in the nutrient-depleted and contaminated soils. However, few studies have characterized the impacts of long-term contamination on soil microbiome composition and diversity at brownfields. This study focuses on an urban brownfield—a former rail yard in Los Angeles that is contaminated with heavy metals, volatile organic compounds, and petroleum-derived pollutants. We anticipate that heavy metals and organic pollutants will shape soil microbiome diversity and that several candidate fungi and bacteria will be tolerant to the contaminants. We sequence three gene markers (16S ribosomal RNA, 18S ribosomal RNA, and the fungal internal transcribed spacer (FITS)) in 55 soil samples collected at five depths to (1) profile the composition of the soil microbiome across depths; (2) determine the extent to which hazardous chemicals predict microbiome variation; and (3) identify microbial taxonomic groups that may metabolize these contaminants. Detected contaminants in the samples included heavy metals, petroleum hydrocarbons, polycyclic aromatic hydrocarbons, and volatile organic compounds. Bacterial, eukaryotic, and fungal communities all varied with depth and with concentrations of arsenic, chromium, cobalt, and lead. 18S rRNA microbiome richness and fungal richness were positively correlated with lead and cobalt levels, respectively. Furthermore, bacterial Paenibacillus and Iamia, eukaryotic Actinochloris, and fungal Alternaria were enriched in contaminated soils compared to uncontaminated soils and represent taxa of interest for future bioremediation research. Based on our results, we recommend incorporating DNA-based multi-marker microbial community profiling at multiple sites and depths in brownfield site assessment standard methods and restoration.

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Influence of sewage sludge, Rhizobium and arbuscular mycorrhizal fungi on nutrient uptake, growth, photosynthetic and biochemical attributes in Cicer arietinum L.

Hasan,

Naushin,

Shaher

et al. 2023

Braz. J. Bot

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Mycorrhizal Infection Can Ameliorate Abiotic Factors in Urban Soils

Cited by 6 publications

References 46 publications

Mycorrhizal fungi and soil factors influence toxic element uptake in urban grown produce

Mycorrhizal fungi and soil factors influence toxic element uptake in urban grown produce

Soil Microbial Community Composition and Tolerance to Contaminants in an Urban Brownfield Site

Influence of sewage sludge, Rhizobium and arbuscular mycorrhizal fungi on nutrient uptake, growth, photosynthetic and biochemical attributes in Cicer arietinum L.

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