Biodegradation of Trichloroethylene by an Endophyte of Hybrid Poplar

Kang, Jun Won; Khan, Zareen; Doty, Sharon L.

doi:10.1128/aem.06852-11

Cited by 87 publications

(40 citation statements)

References 37 publications

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“…These strains showed marked spatial compartmentalization within the plant, proposing there species-specific and non-specific relations between bacteria and plants. Endophytic bacteria possessing the potential to degrade volatile organic pollutants such as trichloroethylene (TCE) have been isolated from English oak (Quercus robur), common ash (Fraxinus excelsior) and popular vegetated in TCE-contaminated soil (Weyens et al, 2010b;Kang et al, 2012). Some organic pollutant-degrading endophytic bacteria also showed resistance to heavy metals and can be applied to enhance the phytoremediation of soil and water polluted with organic pollutants and heavy metals (Weyens et al, 2010a).…”

Section: Ecology Of Pollutant-degrading Endophytic Bacteriamentioning

confidence: 99%

Endophytic bacteria: Prospects and applications for the phytoremediation of organic pollutants

2014

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Section: Ecology Of Pollutant-degrading Endophytic Bacteriamentioning

confidence: 99%

Endophytic bacteria: Prospects and applications for the phytoremediation of organic pollutants

2014

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“…Resistance and destructive ability of microorganisms relatively herbicides, gives reason to consider such bacteria as potential reductants of environment. Identified endophytes plants possessing destructors-genes of pesticides [20], conducted their selection and transfer in transgenic plants [21]. However, along with positive aspects, there is a hypothetical risk of bacterial transfer and horizontal distribution of these genes [22] and consequently, emergence of resistant populations of weed.…”

Section: Herbicidesmentioning

confidence: 99%

Specifics of pesticides effects on the phytopathogenic bacteria

Patyka

Buletsa

Pasichnyk

et al. 2016

Ecological Chemistry and Engineering S

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Abstract:The data concerning the effects of pesticides of different nature on the phytopathogenic bacteria was examined and summarized. Without extensive research on the mechanisms of interaction between pathogenic bacteria and pesticides in the literature review a similar message about microorganisms of soil and phyllosphere are included. The bacteria can be suppressed permanently by pesticides with a mechanism of action that universally affects biological processes in living systems. Long-term storage, ease of use and fast visible effect are the advantages of synthetic pesticides remedies. But chemical pollution, shifts in the balance of ecosystems, unpredictable effects of chemical pesticides on non-target objects are the drawbacks. Stimulation of resistance response in plants is unifying factor for all types of biopesticides. This is realized through localization of the pathogen during infection, blocking its further penetration, distribution and reproduction. The results of the study of effects of plant protection products on the phytopathogenic bacteria of main crops are described. Among all tested pesticides, thiocarbamate fungicides demonstrated significant inhibitory action on phytopathogens, but their effect may be neutralized by other constituents of multicomponent preparations. Triazole fungicides affect the causative agents of bacterioses of crops at a dose of more than 1% of the active substance in the nutrient medium. Insecticides and herbicides have little or no effect on phytopathogenic bacteria; however they can enhance morphological dissociations of some Pseudomonas strains, thereby increasing their ability to survive. The disadvantage of many biopesticides against phytopathogenic microorganisms is the difference between their efficacy in vitro and in vivo that is why the desired result is not achieved in field condition. In addition, biological pesticides often lose their activity causing the problem of constant search for new active antagonists. The fact that the sensitivity of phytopathogenic bacteria to pesticides is strain-dependent should be considered in practice, particularly, assessment of the antibacterial action of various preparations should not be limited to a single bacterial strain.

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“…In terms of a direct response, there is little evidence suggesting similar organic contaminates are often absorbed and mobilized to above-ground tissue (Alkio et al, 2005;Watts et al, 2006;El Amrani et al, 2015;Shiri et al, 2015) or metabolized to any degree by willow directly. There is, however, a growing body of evidence pertaining to metaorganismal interactions whereby a multitude of organisms collectively exploit these unique environmental conditions (Weyens et al, 2009;Kang et al, 2012;Bell et al, 2014a;Yergeau et al, 2014;Gonzalez et al, 2015).…”

mentioning

confidence: 99%

“…This is particularly important for phytoremediation tree systems where rhizospheric bacteria and fungi, as hypothesized from expression profiles, seem essential to understanding organic contamination tolerance (Bell et al, 2014a;Yergeau et al, 2014). Above ground, less research has been conducted with a metaorganismal approach in trees, although endophytes have been demonstrated interacting within the system (Doty et al, 2005;Kang et al, 2012;Khan et al, 2014;Delhomme et al, 2015).…”

mentioning

confidence: 99%

Comparative Transcriptomic Approaches Exploring Contamination Stress Tolerance in Salix sp. Reveal the Importance for a Metaorganismal de Novo Assembly Approach for Nonmodel Plants

et al. 2016

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Metatranscriptomic study of nonmodel organisms requires strategies that retain the highly resolved genetic information generated from model organisms while allowing for identification of the unexpected. A real-world biological application of phytoremediation, the field growth of 10 Salix cultivars on polluted soils, was used as an exemplar nonmodel and multifaceted crop response well-disposed to the study of gene expression. Sequence reads were assembled de novo to create 10 independent transcriptomes, a global transcriptome, and were mapped against the Salix purpurea 94006 reference genome. Annotation of assembled contigs was performed without a priori assumption of the originating organism. Global transcriptome construction from 3.03 billion paired-end reads revealed 606,880 unique contigs annotated from 1588 species, often common in all 10 cultivars. Comparisons between transcriptomic and metatranscriptomic methodologies provide clear evidence that nonnative RNA can mistakenly map to reference genomes, especially to conserved regions of common housekeeping genes, such as actin, a/b-tubulin, and elongation factor 1-a. In Salix, Rubisco activase transcripts were down-regulated in contaminated trees across all 10 cultivars, whereas thiamine thizole synthase and CP12, a Calvin Cycle master regulator, were uniformly up-regulated. De novo assembly approaches, with unconstrained annotation, can improve data quality; care should be taken when exploring such plant genetics to reduce de facto data exclusion by mapping to a single reference genome alone. Salix gene expression patterns strongly suggest cultivar-wide alteration of specific photosynthetic apparatus and protection of the antenna complexes from oxidation damage in contaminated trees, providing an insight into common stress tolerance strategies in a real-world phytoremediation system.Coppiced willows have the ability to produce high biomass yields in temperate regions under challenging conditions and have positive impacts on biodiversity (Labrecque et al

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Biodegradation of Trichloroethylene by an Endophyte of Hybrid Poplar

Cited by 87 publications

References 37 publications

Endophytic bacteria: Prospects and applications for the phytoremediation of organic pollutants

Endophytic bacteria: Prospects and applications for the phytoremediation of organic pollutants

Specifics of pesticides effects on the phytopathogenic bacteria

Comparative Transcriptomic Approaches Exploring Contamination Stress Tolerance in Salix sp. Reveal the Importance for a Metaorganismal de Novo Assembly Approach for Nonmodel Plants

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