Biodegradation of cellulosic and lignocellulosic waste by Pseudoxanthomonas sp R-28

Kumar, Mohit; Revathi, K.; Khanna, Sunil

doi:10.1016/j.carbpol.2015.08.072

Cited by 71 publications

(33 citation statements)

References 28 publications

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“…During the entire RSD treatment, relative abundances of UC-Chitinophagaceae (Bacteroidetes), Clostridium (Firmicutes), UC-Ruminococcaceae (Firmicutes), Pseudoxanthomonas (Proteobacteria), and Flavisolibacter (Bacteroidetes) were always high. Previous studies (Bhat and Bhat, 1997;Biddle et al, 2013;Del Rio et al, 2010;Eichorst et al, 2013;Kumar et al, 2015) have indicated that they also can break down less-degradable organic carbon. Therefore, these TOC decomposers and organic acid producers could collaborate to control FOC (Huang et al, 2015a).…”

Section: Discussionmentioning

confidence: 97%

Relationships of decomposability and C/N ratio in different types of organic matter with suppression of Fusarium oxysporum and microbial communities during reductive soil disinfestation

et al. 2016

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Section: Discussionmentioning

confidence: 97%

Relationships of decomposability and C/N ratio in different types of organic matter with suppression of Fusarium oxysporum and microbial communities during reductive soil disinfestation

et al. 2016

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“…Due to their chemical composition based on sugars and other compounds of interest, they could be utilized to produce several value-added products, such as ethanol, biogas, food additives, organic acids, enzymes, and others [20][21][22][23]. Therefore, besides the environmental problems caused by their accumulation, the non-utilization of these materials constitutes a loss of potentially valuable sources [24]. Previous studies report that the methane generation potential is expected to be much higher if lignocellulosic biomass resources are used.…”

Section: Introductionmentioning

confidence: 99%

Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes

et al. 2018

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Abstract:This article aims to study the codigestion of food waste (FW) and three different lignocellulosic wastes (LW) (Corn stover (CS), Prairie cordgrass (PCG), and Unbleached paper (UBP)) for thermophilic anaerobic digestion to overcome the limitations of digesting food waste alone (volatile fatty acids accumulation and low C:N ratio). Using an enriched thermophilic methanogenic consortium, all the food and lignocellulosic waste mixtures showed positive synergistic effects of codigestion. After 30 days of incubation at 60 • C (100 rpm), the highest methane yield of 305.45 L·kg −1 volatile solids (VS) was achieved with a combination of FW-PCG-CS followed by 279.31 L·kg −1 VS with a mixture of FW-PCG. The corresponding volatile solids reduction for these two co-digestion mixtures was 68% and 58%, respectively. This study demonstrated a reduced hydraulic retention time for methane production using FW and LW.

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“…Several major populations of microbes that accessed 13 C from cellulose were capable of surfaceadherence and/or surface-motility. Genes encoding surface attachment were present in phylobins, or have been previously reported, in Rhizobiaceae (Ensifer/Sinorhizobium, Rhizobium and Agrobacterium), Hyphomicrobiaceae (Devosia), Sphingomonadaceae (Sphingomonas) and Caulobacteraceae (Asticcacaulis, Brevundimonas and Caulobacter), as well as in Pseudoxanthomonas and Planctomycetaceae (Planctomyces and Rhodopirellula) [67][68][69]. Each of these genera, except for those in Planctomyceteceae, are represented by isolates capable of degrading cellulose [70][71][72][73][74][75][76][77].…”

Section: The Role Of Surface Ecology In Decompositionmentioning

confidence: 56%

Competitive exclusion and metabolic dependency among microorganisms structure the cellulose economy of agricultural soil

Wilhelm

Pepe-Ranney

Weisenhorn

et al. 2020

Preprint

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Background Microorganisms that degrade cellulose utilize extracellular processes that yield free intermediates which promote interactions with non-cellulolytic organisms. We hypothesized that these interactions determine the ecological and physiological traits governing the fate of cellulosic carbon (C) in soil. We used data from a metagenomic-SIP experiment to perform comparative genomics and characterize the attributes of cellulolytic and non-cellulolytic taxa accessing 13C from cellulose. We hypothesized that cellulolytic taxa would exhibit competitive traits to limit access, while non-cellulolytic taxa would display metabolic dependency, such as signatures of adaptive gene loss. We tested our hypotheses by evaluating genomic traits indicative of competitive exclusion or metabolic dependency, such as antibiotic production, growth rate, surface attachment, biomass degrading potential and auxotrophy.Results The most 13C-enriched taxa were cellulolytic Cellvibrio (Gammaproteobacteria) and Chaetomium (Ascomycota), which exhibited a strategy of self-sufficiency (prototrophy), rapid growth, and competitive exclusion via antibiotic production. Auxotrophy was more prevalent in cellulolytic Actinobacteria than in cellulolytic Proteobacteria, demonstrating differences in dependency among cellulose degraders. Non-cellulolytic taxa that accessed 13C from cellulose (Planctomycetales, Verrucomicrobia and Vampirovibrionales) were highly dependent, as indicated by patterns of auxotrophy and 13C-labeling (i.e. partial labelling or labeling at later-stages). Major 13C-labeled cellulolytic microbes (e.g. Sorangium, Actinomycetales, Rhizobiales and Caulobacteraceae) possessed adaptations for surface colonization (e.g. gliding motility, hyphae, attachment structures) signifying the importance of surface ecology in decomposition. Conclusions Our results demonstrate that access to cellulose was accompanied by ecological trade-offs characterized by differing degrees of metabolic dependency and competitive exclusion. These trade-offs influence microbial growth dynamics on particulate organic carbon and reveal that the fate of carbon is governed by a complex economy within the microbial community. We propose three ecological groups to describe participants in this economy: (i) independent primary degraders, (ii) integrated primary degraders and (iii) mutualists, opportunists and parasites. The relative importance and taxonomic composition of these groups reported here should be considered context dependent, likely reflecting disturbance and management practices common to agricultural soils.

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Biodegradation of cellulosic and lignocellulosic waste by Pseudoxanthomonas sp R-28

Cited by 71 publications

References 28 publications

Relationships of decomposability and C/N ratio in different types of organic matter with suppression of Fusarium oxysporum and microbial communities during reductive soil disinfestation

Relationships of decomposability and C/N ratio in different types of organic matter with suppression of Fusarium oxysporum and microbial communities during reductive soil disinfestation

Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes

Competitive exclusion and metabolic dependency among microorganisms structure the cellulose economy of agricultural soil

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