Role of Actinobacteria in Bioremediation

Polti, Marta Alejandra; Aparicio, Juan Daniel; Benimeli, Claudia Susana; Amoroso, Maria Julia del R.

doi:10.1016/b978-0-12-800021-2.00011-x

Cited by 18 publications

(17 citation statements)

References 94 publications

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“…Similar results were found in Regupathy Thamizh Vendan through DGGE at varying age levels of P. ginseng , which indicated that α-Proteobacteria and Actinobacteria were predominant in P. ginseng soil [21] . In the present study, Actinobacteria represented an important component of the microbial population in soil [35] , which was used as a biocontrolling agent to control soil- and seed-borne diseases of plants [36] . Interestingly, some Actinomyces species gradually appeared or disappeared with the cultivation of P. ginseng , suggesting that the environment of P. ginseng soil significantly affected the Actinobacteria community.…”

Section: Discussionmentioning

confidence: 95%

Effects of cultivation ages and modes on microbial diversity in the rhizosphere soil of Panax ginseng

Xiao

Yang

Zhang

et al. 2016

Journal of Ginseng Research

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BackgroundPanax ginseng cannot be cultivated on the same land consecutively for an extended period, and the underlying mechanism regarding microorganisms is still being explored.MethodsPolymerase chain reaction and denaturing gradient gel electrophoresis (PCR-DGGE) and BIOLOG methods were used to evaluate the microbial genetic and functional diversity associated with the P. ginseng rhizosphere soil in various cultivation ages and modes.ResultsThe analysis of microbial diversity using PCR-DGGE showed that microbial communities were significantly variable in composition, of which six bacterial phyla and seven fungal classes were detected in P. ginseng soil. Among them, Proteobacteria and Hypocreales dominated. Fusarium oxysporum, a soilborne pathogen, was found in all P. ginseng soil samples except R0. The results from functional diversity suggested that the microbial metabolic diversity of fallow soil abandoned in 2003 was the maximum and transplanted soil was higher than direct-seeding soil and the forest soil uncultivated P. ginseng, whereas the increase in cultivation ages in the same mode led to decreases in microbial diversity in P. ginseng soil. Carbohydrates, amino acids, and polymers were the main carbon sources utilized. Furthermore, the microbial diversity index and multivariate comparisons indicated that the augmentation of P. ginseng cultivation ages resulted in decreased bacterial diversity and increased fungal diversity, whereas microbial diversity was improved strikingly in transplanted soil and fallow soil abandoned for at least one decade.ConclusionThe key factors for discontinuous P. ginseng cultivation were the lack of balance in rhizosphere microbial communities and the outbreak of soilborne diseases caused by the accumulation of its root exudates.

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Section: Discussionmentioning

confidence: 95%

Effects of cultivation ages and modes on microbial diversity in the rhizosphere soil of Panax ginseng

Xiao

Yang

Zhang

et al. 2016

Journal of Ginseng Research

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“…Their mycelial growth form creates the potential for the formation of large networks (Krsek et al, 2000). They are typically present at densities in the order of 10 6 -10 9 cells per gram of soil and they represent more than 30% of the total population of soil microbiomes (Polti et al, 2014). Actinobacteria play an important role in soil and in plant interaction because of their ability to produce a large number of secondary metabolites, many of which possess antibacterial activity (Lazzarini et al, 2000).…”

Section: Box 2 | Features and Taxonomy Of Actinobacteriamentioning

confidence: 99%

From Isolation of Phosphate Solubilizing Microbes to Their Formulation and Use as Biofertilizers: Status and Needs

Soumaré

Boubekri

Lyamlouli

et al. 2020

Front. Bioeng. Biotechnol.

130

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The production of biofertilizers at industrial level is a bottleneck because bacterial strains are generally developed and managed by research laboratories and not by production units. A seamless transition from laboratory to field application is, therefore necessary. This review provides an overview of the constraints that limiting the application or the implementation of Actinobacteria based biofertilizers especially in agricultural field and suggests solutions to overcome some of these limits. General processes of making and controlling the quality of the inoculum are briefly described. In addition, the paper underlines the opportunity of biofertilizers alone or in combination with chemical fertilizers. This review also, highlights the latest studies (until June 2019) and focuses on P-solubilization microorganisms mainly Actinobacteria. The biotechnology of these bacteria is a glimmer of hope for rock phosphate (RP) bioformulation. Since direct application of RP fertilizer is not always agronomically effective due to its sparse solubility.

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“…The phyla include different species with significant ecological importance and roles in decomposition, humus formation, nitrogen fixation and antibiotic production ( Bond et al, 2004 ; Barka et al, 2016 ; Kielak et al, 2016 ). These communities are known biodegraders of PAHs ( Leticia, 2006 ; Ghosal et al, 2016 ), pesticides ( De Schrijver and De Mot, 1999 ; Fuentes et al, 2010 ), heavy metals ( Alvarez et al, 2017 ), and xenobiotics ( Polti et al, 2014 ). Firmicutes that also represented dominant community in the wheat rhizosphere inhabited varied range of environment as anaerobes (e.g., Clostridia) and aerobes (e.g., Bacillus ).…”

Section: Resultsmentioning

confidence: 99%

Metatranscriptome Analysis Deciphers Multifunctional Genes and Enzymes Linked With the Degradation of Aromatic Compounds and Pesticides in the Wheat Rhizosphere

et al. 2018

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Agricultural soils are becoming contaminated with synthetic chemicals like polyaromatic compounds, petroleum hydrocarbons, polychlorinated biphenyls (PCBs), phenols, herbicides, insecticides and fungicides due to excessive dependency of crop production systems on the chemical inputs. Microbial degradation of organic pollutants in the agricultural soils is a continuous process due to the metabolic multifunctionalities and enzymatic capabilities of the soil associated communities. The plant rhizosphere with its complex microbial inhabitants and their multiple functions, is amongst the most live and dynamic component of agricultural soils. We analyzed the metatranscriptome data of 20 wheat rhizosphere samples to decipher the taxonomic microbial communities and their multifunctionalities linked with the degradation of organic soil contaminants. The analysis revealed a total of 21 different metabolic pathways for the degradation of aromatic compounds and 06 for the xenobiotics degradation. Taxonomic annotation of wheat rhizosphere revealed bacteria, especially the Proteobacteria, actinobacteria, firmicutes, bacteroidetes, and cyanobacteria, which are shown to be linked with the degradation of aromatic compounds as the dominant communities. Abundance of the transcripts related to the degradation of aromatic amin compounds, carbazoles, benzoates, naphthalene, ketoadipate pathway, phenols, biphenyls and xenobiotics indicated abundant degradation capabilities in the soils. The results highlighted a potentially dominant role of crop rhizosphere associated microbial communities in the remediation of contaminant aromatic compounds.

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Role of Actinobacteria in Bioremediation

Cited by 18 publications

References 94 publications

Effects of cultivation ages and modes on microbial diversity in the rhizosphere soil of Panax ginseng

Effects of cultivation ages and modes on microbial diversity in the rhizosphere soil of Panax ginseng

From Isolation of Phosphate Solubilizing Microbes to Their Formulation and Use as Biofertilizers: Status and Needs

Metatranscriptome Analysis Deciphers Multifunctional Genes and Enzymes Linked With the Degradation of Aromatic Compounds and Pesticides in the Wheat Rhizosphere

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