Characteristics of atmospheric bacterial and fungal communities in PM2.5 following biomass burning disturbance in a rural area of North China Plain

Wei, Min; Xu, Caihong; Xu, Xilong; Zhu, Chongshu; Li, Jiarong; Lv, Ganglin

doi:10.1016/j.scitotenv.2018.09.399

Cited by 79 publications

(54 citation statements)

References 105 publications

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“…These results are similar to those observed in previous studies conducted in different environments around the world, where Proteobacteria, Actinobacteria and Firmicutes have also been reported as dominant bacterial phyla (Liu et al, 2019;Maron et al, 2005;Wei et al, 2019a). In particular, the most frequent gram-negative (Proteobacteria and Bacteroidetes) and gram-positive (Actinobacteria and Firmicutes) Bacteria, and filamentous Fungi (Ascomycota and Basidiomycota) have been previously linked to raw straw handling activities.…”

Section: Composition Of Airborne Fungal and Bacterial Communitiessupporting

confidence: 91%

“…In particular, the most frequent gram-negative (Proteobacteria and Bacteroidetes) and gram-positive (Actinobacteria and Firmicutes) Bacteria, and filamentous Fungi (Ascomycota and Basidiomycota) have been previously linked to raw straw handling activities. For instance, it has been suggested that straw combustion during agricultural activities could be a major source of airborne microorganisms in PM2.5 at the northern plains of China (Wei et al, 2019a(Wei et al, , 2019b. However, in our study, SC species are not correlated (R = −0.03, p = 0.82; Fig.…”

Section: Composition Of Airborne Fungal and Bacterial Communitiescontrasting

confidence: 76%

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High levels of primary biogenic organic aerosols in the atmosphere in summer are driven by only a few microbial taxa from the leaves of surrounding plants

Samaké

Bonin

Jaffrezo

et al. 2020

Preprint

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Abstract. Primary biogenic organic aerosols (PBOA) represent a major fraction of coarse organic matter (OM) in air. Despite their implication in many atmospheric processes and human health problems, we surprisingly know little about PBOA characteristics (i.e., composition, dominant sources, and contribution to airborne-particles). In addition, specific primary sugar compounds (SCs) are generally used as markers of PBOA associated with Bacteria and Fungi but our knowledge of microbial communities associated with atmospheric particulate matter (PM) remains incomplete. This work aimed at providing a comprehensive understanding of the microbial fingerprints associated with SCs in PM10 (particles smaller than 10&#8201;&#181;m) and their main sources in the surrounding environment (soils and vegetation). An intensive study was conducted on PM10 collected at rural background site located in an agricultural area in France. We combined high-throughput sequencing of Bacteria and Fungi with detailed physicochemical characterization of PM10, soils and plant samples, and monitored meteorology and agricultural activities throughout the sampling period. Results shows that in summer SCs in PM10 are a major contributor of OM in air, representing 0.8 to 13.5&#8201;% of OM mass. SCs concentrations are clearly determined by the abundance of only a few specific airborne Fungi and Bacteria Taxa. These microbial are significantly enhanced in leaf over soil samples. Interestingly, the overall community structure of Bacteria and Fungi are similar within PM10 and leaf samples and significantly distinct between PM10 and soil samples, indicating that surrounding vegetation are the major source of SC-associated microbial taxa in PM10 in rural area.

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Section: Composition Of Airborne Fungal and Bacterial Communitiessupporting

confidence: 91%

Section: Composition Of Airborne Fungal and Bacterial Communitiescontrasting

confidence: 76%

High levels of primary biogenic organic aerosols in the atmosphere in summer are driven by only a few microbial taxa from the leaves of surrounding plants

Samaké

Bonin

Jaffrezo

et al. 2020

Preprint

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“…Total bacteria in atmospheric aerosols depend on a number of factors, including geographical terrain and analytical methods, and may vary from 10 2 to 10 6 cells·m −3 [11]. The average concentration of microorganisms in the air before combustion was around 1.33 × 10 3 CFU/m 3 and 5.82 × 10 2 CFU/m 3 for biomass combustion ad prescribed burning experiments respectively, which is in line with other studies.…”

Section: Discussionsupporting

confidence: 88%

“…A comprehensive one-year study [23] showed a strong positive correlation of Gram-positive and gran-negative bacteria concentrations with organic carbon and biomass burning derived potassium that indicated their association with emissions from biomass burning. Wei et al [11] have recently confirmed elevated concentrations total bacteria and fungi during the burning period in China. The critical factors for fungal and bacterial communities included organic carbon, magnesium and wind speed.…”

Section: Discussionmentioning

confidence: 94%

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Generation of Viable Bacterial and Fungal Aerosols during Biomass Combustion

Mirskaya

Agranovski

2020

Atmosphere

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Biomass combustion is known to be one of the main contributors to air pollution. However, the influence of biomass burning on the distribution of viable bacterial and fungal aerosols is uncertain. This study aimed to examine survivability of bacteria and fungi in the post-combustion products, and to investigate the aerosolization of viable cells during combustion of different types of organic materials. Laboratory experiments included a small-scale combustion of organic materials contaminated with microorganisms in order to determine the survivability of microbes in the combustion products and the potential aerosolization of viable cells during combustion. Field experiments were completed during intentional and prescribed biomass burning events in order to investigate the aerosolization mechanisms that are not available at the laboratory scale. Laboratory experiments did not demonstrate aerosolization of microorganisms during biomass combustion. However, the relatively high survival rate of bacteria in the combustion products ought to be accounted for, as the surviving microorganisms can potentially be aerosolized by high velocity natural air flows. Field investigations demonstrated significant increase in the bioaerosol concentration above natural background during and after biomass combustion.

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Solid‐state valorization of raw oil palm leaves by novel fungi Trichoderma asperellumUC1 and Rhizopus oryzaeUC2 for sustainable production of cellulase and xylanase

Ezeilo

Wahab

Huyop

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND:The growing demand for cellulases and xylanases in lignocellulosic degradation and reutilization has spurred the need for their improved production at reduced cost. Abundantly available oil palm leaves (OPL) promise an alternative and sustainable substrate for producing such enzymes in the degradation and biotransformation of unwanted lignocellulosic biomass. Both enzymes are key players in the transformation of biomass into other value-added commodities.RESULTS: This study statistically optimized the solid-state fermentation (SSF) of raw OPL by novel fungal strains Trichoderma asperellum UC1 and Rhizopus oryzae UC2, to produce cellulase and xylanase, where raw OPL was pretreated using ultrasonication before the dual enzyme-assisted saccharification process. This experiment aimed to identify the best parameters for the highest activity of CMCase (EC 3.2.1.4), FPase (EC 3.2.1.91) and xylanase (EC 3.2.1.8) of T. asperellum UC1 and of ⊎-glucosidase (EC 3.2.1.21) of R. oryzae UC2 for improved saccharification. Activities of CMCase (126.87 U g −1 ), FPase (85.53 U g −1 ) and xylanase (215.42 U g −1 ) achieved the maximum under optimized SSF conditions (30 °C, 2.0 × 10 7 spores g −1 , 75% moisture content, pH 6). The best ⊎-glucosidase activity (131.76 U g −1 ) was obtained at 32 °C, 2.0 × 10 7 spores g −1 , 50% moisture content, pH 12. OPL saccharification yielded 1240 ± 32 mg g −1 total reducing sugar. Individual enzyme cocktails improved juice clarification (84-88%) and dough rising (1.7-to 2.0-fold).CONCLUSIONS: The optimized SSF of raw OPL successfully afforded the production of effective cellulases and xylanases for saccharification-related reactions.

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Characteristics of atmospheric bacterial and fungal communities in PM2.5 following biomass burning disturbance in a rural area of North China Plain

Cited by 79 publications

References 105 publications

High levels of primary biogenic organic aerosols in the atmosphere in summer are driven by only a few microbial taxa from the leaves of surrounding plants

High levels of primary biogenic organic aerosols in the atmosphere in summer are driven by only a few microbial taxa from the leaves of surrounding plants

Generation of Viable Bacterial and Fungal Aerosols during Biomass Combustion

Solid‐state valorization of raw oil palm leaves by novel fungi Trichoderma asperellumUC1 and Rhizopus oryzaeUC2 for sustainable production of cellulase and xylanase

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