Bioremediation of organophosphorus pesticide phorate in soil by microbial consortia

Jariyal, Monu; Jindal, Vikas; Mandal, Kousik; Gupta, Vipan; Singh, Balwinder

doi:10.1016/j.ecoenv.2018.04.063

Cited by 81 publications

(35 citation statements)

References 30 publications

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“…Positive interactions are predicted to enhance a community's diversity and productivity but decrease its stability (6,25,26). Therefore, a better understanding of these interactions would enhance our ability to manipulate and manage communities, with widespread applicability in environmental conservation (27), crop health (28), and human health (29). Nevertheless, the data required for quantifying the distribution of interactions across environments is still lacking due to methodological limitations that frustrate comprehensive sampling of interactions under many conditions (30).…”

Section: Main Textmentioning

confidence: 99%

Positive interactions are common among culturable bacteria

Kehe

Ortiz

Kulesa

et al. 2020

Preprint

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Interspecies interactions shape the structure and function of microbial communities. In particular, positive, growth-promoting interactions can significantly affect the diversity and productivity of natural and engineered communities. However, the prevalence of positive interactions and the conditions in which they occur are not well understood. To address this knowledge gap, we used kChip, an ultra-high throughput coculture platform, to measure 180,408 interactions among 20 soil bacteria across 40 carbon environments. We find that positive interactions, often described to be rare, occur commonly, primarily as parasitisms between strains that differ in their carbon consumption profiles. Notably, non-growing strains are almost always promoted by strongly growing strains (85%), suggesting a simple positive interaction-mediated approach for cultivation, microbiome engineering, and microbial consortium design.One Sentence Summary: Experimental measurement of >150,000 bacterial cocultures reveals that growth-promoting interactions occur commonly and depend on differences in nutrient consumption preferences.

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Section: Main Textmentioning

confidence: 99%

Positive interactions are common among culturable bacteria

Kehe

Ortiz

Kulesa

et al. 2020

Preprint

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“…Mixed microbial cultures (MMC), also referred to as microbiomes, are communities of microorganisms within a well-defined environment of specific physicochemical properties [31]. Microbiomes are employed in biotechnology, for example in anaerobic digestion (AD), and in bioremediation by cultivating communities within contaminated soils [32,33]. The term “microbiome” is used to describe the mixed microbial communities related to the human and animal gut, mouth or skin, or plant rhizospheres.…”

Section: Introductionmentioning

confidence: 99%

Medium Chain Carboxylic Acids from Complex Organic Feedstocks by Mixed Culture Fermentation

et al. 2019

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Environmental pressures caused by population growth and consumerism require the development of resource recovery from waste, hence a circular economy approach. The production of chemicals and fuels from organic waste using mixed microbial cultures (MMC) has become promising. MMC use the synergy of bio-catalytic activities from different microorganisms to transform complex organic feedstock, such as by-products from food production and food waste. In the absence of oxygen, the feedstock can be converted into biogas through the established anaerobic digestion (AD) approach. The potential of MMC has shifted to production of intermediate AD compounds as precursors for renewable chemicals. A particular set of anaerobic pathways in MMC fermentation, known as chain elongation, can occur under specific conditions producing medium chain carboxylic acids (MCCAs) with higher value than biogas and broader applicability. This review introduces the chain elongation pathway and other bio-reactions occurring during MMC fermentation. We present an overview of the complex feedstocks used, and pinpoint the main operational parameters for MCCAs production such as temperature, pH, loading rates, inoculum, head space composition, and reactor design. The review evaluates the key findings of MCCA production using MMC, and concludes by identifying critical research targets to drive forward this promising technology as a valorisation method for complex organic waste.

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“…Polycyclic and heterocyclic aromatic compounds have potential toxic, mutagenic, and carcinogenic effects on humans (Dean, 1985 ; Yoshikawa et al, 1985 ; Hu et al, 2014 ; Nguyen et al, 2014 ; Zhao et al, 2017 ). For example, organophosphorus insecticide inhibits acetylcholinesterase, which is crucial for the transmission of normal nerve impulses (Jariyal et al, 2018 ). Microcystins produced by some genera of cyanobacteria inhibit protein phosphatases 1 and 2A and promote tumor formation (Mackintosh et al, 1990 ; Campos and Vasconcelos, 2010 ), which causes severe health risks to plants, animals, and humans.…”

Section: Introductionmentioning

confidence: 99%

Comparative Genomics of Degradative Novosphingobium Strains With Special Reference to Microcystin-Degrading Novosphingobium sp. THN1

Wang

et al. 2018

Front. Microbiol.

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Bacteria in genus Novosphingobium associated with biodegradation of substrates are prevalent in environments such as lakes, soil, sea, wood and sediments. To better understand the characteristics linked to their wide distribution and metabolic versatility, we report the whole genome sequence of Novosphingobium sp. THN1, a microcystin-degrading strain previously isolated by Jiang et al. (2011) from cyanobacteria-blooming water samples from Lake Taihu, China. We performed a genomic comparison analysis of Novosphingobium sp. THN1 with 21 other degradative Novosphingobium strains downloaded from GenBank. Phylogenetic trees were constructed using 16S rRNA genes, core genes, protein-coding sequences, and average nucleotide identity of whole genomes. Orthologous protein analysis showed that the 22 genomes contained 674 core genes and each strain contained a high proportion of distributed genes that are shared by a subset of strains. Inspection of their genomic plasticity revealed a high number of insertion sequence elements and genomic islands that were distributed on both chromosomes and plasmids. We also compared the predicted functional profiles of the Novosphingobium protein-coding genes. The flexible genes and all protein-coding genes produced the same heatmap clusters. The COG annotations were used to generate a dendrogram correlated with the compounds degraded. Furthermore, the metabolic profiles predicted from KEGG pathways showed that the majority of genes involved in central carbon metabolism, nitrogen, phosphate, sulfate metabolism, energy metabolism and cell mobility (above 62.5%) are located on chromosomes. Whereas, a great many of genes involved in degradation pathways (21–50%) are located on plasmids. The abundance and distribution of aromatics-degradative mono- and dioxygenases varied among 22 Novosphingoibum strains. Comparative analysis of the microcystin-degrading mlr gene cluster provided evidence for horizontal acquisition of this cluster. The Novosphingobium sp. THN1 genome sequence contained all the functional genes crucial for microcystin degradation and the mlr gene cluster shared high sequence similarity (≥85%) with the sequences of other microcystin-degrading genera isolated from cyanobacteria-blooming water. Our results indicate that Novosphingobium species have high genomic and functional plasticity, rearranging their genomes according to environment variations and shaping their metabolic profiles by the substrates they are exposed to, to better adapt to their environments.

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Bioremediation of organophosphorus pesticide phorate in soil by microbial consortia

Cited by 81 publications

References 30 publications

Positive interactions are common among culturable bacteria

Positive interactions are common among culturable bacteria

Medium Chain Carboxylic Acids from Complex Organic Feedstocks by Mixed Culture Fermentation

Comparative Genomics of Degradative Novosphingobium Strains With Special Reference to Microcystin-Degrading Novosphingobium sp. THN1

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