Influence of metal contamination in soil on metabolic profiles of  Miscanthus  x  giganteus  belowground parts and associated bacterial communities

Pham, Hoang Nam; Pham, Phuong Anh; Nguyen, Thi Thu Huong; Meiffren, Guillaume; Brothier, Elisabeth; Lamy, Isabelle; Michalet, Serge; Dijoux‐Franca, Marie‐Geneviève; Nazaret, Sylvie

doi:10.1016/j.apsoil.2018.01.004

Cited by 14 publications

(10 citation statements)

References 43 publications

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“…In addition, several studies have found that different microorganisms respond differently to the toxicity of heavy metals: those microorganisms that are susceptible to toxins abruptly decrease while resistant microorganisms can adapt to environmental changes. For example, considering environmental changes, Candidatus Solibacter, Gemmatimonas, Terrimonas and Nitrospira were found to increase in terms of relative abundance in metal-contaminated soil, while the relative abundance of Longilinea decreased [16,38]. Our results were consistent with these observations.…”

Section: Discussionsupporting

confidence: 90%

Soil Bacterial Community Structure in Turfy Swamp and Its Response to Highway Disturbance

et al. 2020

IJERPH

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In recent years, the construction and development of highways in turfy swamp areas has been very common. When highways pass through turfy swamps, they can change the local soil, vegetation and hydrological environment, but the impact on soil microorganisms is unclear. We studied the impact of highways on soil microbial communities and diversity in three turfy swamps. Soil samples were collected in the affected area (distance from the expressway 10 m) and control area (distance from the expressway 500–1000 m), and the soil properties, heavy metal content and microbial composition were measured. Subsequent statistical analysis showed that soil organic carbon (SOC), total nitrogen (TN), Cd, Cr, Zn, Cu, density and especially water table (WT) are the main driving forces affecting the composition of microorganisms. The WT and density can also be used to predict the change trend of the ratio of proteobacteria to acid bacteria, reflecting the soil nutrient status. In general, the composition of soil microorganisms in turfy swamp is mainly affected by road drainage and heavy metal emissions. This research provides new insights into the impact of highways on turfy swamps from the perspective of bacterial diversity and community composition, and it also provides a basis for the restoration of the wetland ecological environment.

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Section: Discussionsupporting

confidence: 90%

Soil Bacterial Community Structure in Turfy Swamp and Its Response to Highway Disturbance

et al. 2020

IJERPH

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“…Only Pb, Cd and Cr resulted in higher abundances of taxa, which can be seen in Figs 1, 3, 4, 6 and 7. These results are not surprising, since previous studies have reported disturbances in rhizosphere communities due to metal stress [42][43][44][45]. On the other hand, Zedel and co-workers [45] demonstrated that overall richness and bacterial 16S rRNA copy numbers did not differ between control and heavy metal treatment.…”

Section: Plos Onesupporting

confidence: 53%

“…In the case of Cr-treatment, there was an almost 3 times higher number of species recorded (105) than in the control sample (Table 1). According to these data, the samples were divided into two groups: A-observed number of taxa similar to the control sample (36)(37)(38)(39)(40)(41)(42)(43)(44), B-representing the samples with a much higher number of observed taxa compared to the control sample (95-105). We performed t-test on the groups mentioned and found that low number taxa group (A), including NTP, differed significantly from those of high richness (B, p<0.001).…”

Section: Diversity and Richness Of The Microbiomementioning

confidence: 99%

Azolla filiculoides L. as a source of metal-tolerant microorganisms

et al. 2020

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The metal hyperaccumulator Azolla filiculoides is accompanied by a microbiome potentially supporting plant during exposition to heavy metals. We hypothesized that the microbiome exposition to selected heavy metals will reveal metal tolerant strains. We used Next Generation Sequencing technique to identify possible metal tolerant strains isolated from the metaltreated plant (Pb, Cd, Cr(VI), Ni, Au, Ag). The main dominants were Cyanobacteria and Proteobacteria constituting together more than 97% of all reads. Metal treatment led to changes in the composition of the microbiome and showed significantly higher richness in the Pb-, Cd-and Cr-treated plant in comparison with other (95-105 versus 36-44). In these treatments the share of subdominant Actinobacteria (0.4-0.8%), Firmicutes (0.5-0.9%) and Bacteroidetes (0.2-0.9%) were higher than in non-treated plant (respectively: 0.02, 0.2 and 0.001%) and Ni-, Au-and Ag-treatments (respectively: <0.4%, <0.2% and up to 0.2%). The exception was Au-treatment displaying the abundance 1.86% of Bacteroidetes. In addition, possible metal tolerant genera, namely: Acinetobacter,

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“…Interspecies interactions may affect the abundance of some soil microbial populations, but they do not affect population diversity ( Li et al, 2018 ; Yu et al, 2019 ). Previous research has shown that the above-mentioned dominant bacterial groups participate in soil N and P cycling ( Fierer et al, 2012 ; Zhang et al, 2016 ; Pham et al, 2018 ; Sekar et al, 2018 ), which improves the growth of medicinal plants. Actinomycetes found for ecological sites in the soil or the plant rhizosphere environment directly prevents pathogens from infecting plants, and reduces the number of pathogens through spatial competition and antibiosis ( Samac et al, 2003 ).…”

Section: Discussionmentioning

confidence: 99%

Intercropping With Turmeric or Ginger Reduce the Continuous Cropping Obstacles That Affect Pogostemon cablin (Patchouli)

Zeng

Liu

et al. 2020

Front. Microbiol.

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Continuous cropping (CC) restricts the development of the medicinal plant cultivation industry because it alters soil properties and the soil microbial micro-ecological environment. It can also lead to reductions in the chemical contents of medicinal plants. In this study, we intercropped continuously cropped Pogostemon cablin (patchouli) with turmeric or ginger. High-throughput sequencing was used to study the soil bacteria and fungi. Community composition, diversity, colony structure, and colony differences were also analyzed. A redundancy analysis (RDA) was used to study the interactions between soil physical and chemical factors, and the bacteria and fungi. The correlations between the soil community and the soil physical and chemical properties were also investigated. The results showed that intercropping turmeric and ginger with patchouli can improve soil microbial abundance, diversity, and community structure by boosting the number of dominant bacteria, and by improving soil bacterial metabolism and the activities of soil enzymes. They also modify the soil physical and chemical properties through changes in enzyme activity, soil pH, and soil exchangeable Ca (Ca). In summary, turmeric and ginger affect the distribution of dominant bacteria, and increase the contents of the active ingredient in patchouli. The results from this study suggested that the problems associated with continuously cropping patchouli can be ameliorated by intercropping it with turmeric and ginger.

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Influence of metal contamination in soil on metabolic profiles of Miscanthus x giganteus belowground parts and associated bacterial communities

Cited by 14 publications

References 43 publications

Soil Bacterial Community Structure in Turfy Swamp and Its Response to Highway Disturbance

Soil Bacterial Community Structure in Turfy Swamp and Its Response to Highway Disturbance

Azolla filiculoides L. as a source of metal-tolerant microorganisms

Intercropping With Turmeric or Ginger Reduce the Continuous Cropping Obstacles That Affect Pogostemon cablin (Patchouli)

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