Ecosystem services and plant physiological status during endophyte-assisted phytoremediation of metal contaminated soil

Burges, Aritz; Epelde, Lur; Blanco, F.; Becerril, José M.; Garbisu, Carlos

doi:10.1016/j.scitotenv.2016.12.146

Cited by 83 publications

(34 citation statements)

References 55 publications

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“…Among the isolates tested, the Phyllobacterium sp. isolate (R01.34) that showed the greatest performance on birch also exhibited multiple PGP traits, including the production of IAA and the solubilization of P. PGP rhizobacteria and bacterial endophytes have huge potential to increase the bioremediation of PTE-contaminated sites ( Chen et al, 2010 ; Luo et al, 2011 ; Xinxian et al, 2011 ; Burges et al, 2017 ). Ma et al (2013) demonstrated the similar performance of Phyllobacterium myrsinacearum on Sedum plumbizincicola growth, although this strain increased metal transfer to the shoot, which was not observed in our study.…”

Section: Resultsmentioning

confidence: 99%

Streptomyces Dominate the Soil Under Betula Trees That Have Naturally Colonized a Red Gypsum Landfill

et al. 2018

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The successful restoration of well-engineered tailings storage facilities is needed to avoid mine tailings problems. This study characterized the bacterial communities from vegetated and non-vegetated soils from a red gypsum landfill resulting from the industrial extraction of titanium. A set of 275 bacteria was isolated from vegetated soil and non-vegetated soil areas and taxonomically characterized using BOX-PCR. The study also evaluated the ability of a subset of 88 isolated bacteria on their ability to produce plant growth promoting (PGP) traits [indoleacetic acid (IAA) production, phosphate solubilization, and siderophore production] and their tolerance to potentially toxic elements (PTEs). Twenty strains were chosen for further analysis to produce inoculum for birch-challenging experiments. Principal component analysis (PCA) showed that the set of pedological parameters (pH, granulometry, carbon, organic matter, and Mg content) alone explained approximately 40% of the differences between the two soils. The highest density of total culturable bacteria was found in the vegetated soil, and it was much higher than that in the non-vegetated soil. The Actinobacteria phyla dominated the culturable soil community (70% in vegetated soil and 95% in non-vegetated soil), while the phyla Firmicutes (including the genus Bacillus) and Bacteroides (including the genera Pedobacter and Olivibacter) were found only in the vegetated soil fraction. Additional genera (Rhizobium, Variovorax, and Ensifer) were found solely in the vegetated soil. The vegetated soil bacteria harbored the most beneficial PGP bacteria with 12% of the isolates showing three or more PGP traits. The strains with higher metal tolerances in our study were Phyllobacterium sp. WR140 (RO1.15), Phyllobacterium sp. WR140 (R01.34), and Streptomyces sp. (R04.15), all isolated from the vegetated soil. Among the isolates tested in challenging experiments, Phyllobacterium (R01.34) and Streptomyces sp. (R05.33) have the greatest potential to act as PGP rhizobacteria and therefore to be used in the biological restoration of tailings dumps.

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Section: Resultsmentioning

confidence: 99%

Streptomyces Dominate the Soil Under Betula Trees That Have Naturally Colonized a Red Gypsum Landfill

et al. 2018

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“…Phytoremediation efficiency and biodegradation of organic contaminants, as well as plant growth, can be enhanced by suitable combinations of plants and their associated endophytes. However, the studies on endophytes are mainly based on laboratory experiments and so far they have rarely been conducted under field conditions [75,76].…”

Section: Resultsmentioning

confidence: 99%

Phytoremediation Potential of Fast-Growing Energy Plants: Challenges and Perspectives – a Review

Hauptvogl¹,

Kotrla²,

Prčík³

et al. 2019

Pol. J. Environ. Stud.

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Contamination of soil by toxic elements is a global issue of growing importance due to the increased anthropogenic impact on the natural environment. Conventional methods of soil decontamination possess disadvantages in forms of environmental and financial burdens. This fact leads to the search for alternative approaches of remediation of contaminated sites. One such approach includes phytoremediation. Phytoremediation advantages consist of low costs and small environmental impact. Several fast-growing energy plant species are suitable for phytoremediation purposes. Our article focuses on the phytoremediation potential of energy woody crops of Salix and Populus, and energy grasses Miscanthus and Arundo, which are grown primarily for biomass production. This approach links the environmentally friendly and economically less demanding remediation approach with the production of the local sustainable form of energy that decreases dependency on external energy supplies. Energy plants are able to provide high biomass yields in a short period of time, they are resistant against abiotic stress conditions and have the ability to accumulate toxic substances, thus helping to restore the desirable soil properties. The phytoremediation research is very interdisciplinary in its nature. In order to implement phytoremediation practices together with bioenergy successfully, it is crucial to involve site owners, local people, farmers, technology providers and consultants, remediation experts, sustainability assessors, regulatory agencies and certification bodies, biorefineries, financial sponsors, NGOs and other voluntary organizations. Some disadvantages and challenges of phytoremediation are also indicated.

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“…The associated microbes can enhance host plant growth, increase solubility and bioavailability of contaminant and alter heavy metal accumulation through IAA, siderophores, organic acids and biosurfactant production (Li et al ., 2012a; Ullah et al ., 2015a,b; Tirry et al ., 2018). Moreover, microbes can indirectly enhance phytoremediation by stimulating soil microbial communities (Burges et al ., 2017). Endophytes have been demonstrated to play a key role in host plant adaptation to polluted environments and that they can enhance phytoremediation by mobilizing/degrading or immobilizing contaminants in the soil, promoting plant growth, decreasing phytotoxicity and improving plants’ metal tolerance, as well as in other ways (Li et al ., 2012a).…”

Section: Discussionmentioning

confidence: 99%

Endophytic fungal community of Dysphania ambrosioides from two heavy metal‐contaminated sites: evaluated by culture‐dependent and culture‐independent approaches

Parmar

et al. 2018

Microbial Biotechnology

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SummaryEndophytic fungal communities of Dysphania ambrosioides, a hyperaccumulator growing at two Pb‐Zn‐contaminated sites, were investigated through culture‐dependent and culture‐independent approaches. A total of 237 culturable endophytic fungi (EF) were isolated from 368 tissue (shoot and roots) segments, and the colonization rate (CR) ranged from 9.64% to 65.98%. The isolates were identified to 43 taxa based on morphological characteristics and rDNA ITS sequence analysis. Among them, 13 taxa (30.23%) were common in plant tissues from both sites; however, dominant EF were dissimilar. In culture‐dependent study, 1989 OTUs were obtained through Illumina Miseq sequencing, and dominant EF were almost same in plant tissues from both sites. However, some culturable EF were not observed in total endophytic communities. We suggest that combination of both culture‐dependent and culture‐independent methods will provide more chances for the precise estimation of endophytic fungal community than using either of them. The tissue had more influence on the culturable fungal community structure, whereas the location had more influence on the total fungal community structure (including culturable and unculturable). Both culture‐dependent and culture‐independent studies illustrated that endophytic fungal communities of D. ambrosioides varied across the sites, which suggested that HM concentration of the soil may have some influence on endophytic fungal diversity.

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Ecosystem services and plant physiological status during endophyte-assisted phytoremediation of metal contaminated soil

Cited by 83 publications

References 55 publications

Streptomyces Dominate the Soil Under Betula Trees That Have Naturally Colonized a Red Gypsum Landfill

Streptomyces Dominate the Soil Under Betula Trees That Have Naturally Colonized a Red Gypsum Landfill

Phytoremediation Potential of Fast-Growing Energy Plants: Challenges and Perspectives – a Review

Endophytic fungal community of Dysphania ambrosioides from two heavy metal‐contaminated sites: evaluated by culture‐dependent and culture‐independent approaches

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