0295 - Do microbes have memory? Repeated exposure to emulsified vegetable oil may increase degradation ability of native microbial communities

2018 ◽  
Author(s):  
Katie McBride ◽  
Daliang Ning ◽  
Ji Won Moon ◽  
Terry Hazen
Keyword(s):  
Microbial Communities ◽  
Vegetable Oil ◽  
Repeated Exposure ◽  
Degradation Ability

scholarly journals Dynamic Succession of Groundwater Functional Microbial Communities in Response to Emulsified Vegetable Oil Amendment during SustainedIn SituU(VI) Reduction

2015 ◽  
Vol 81 (12) ◽  
pp. 4164-4172 ◽  
Author(s):  
Ping Zhang ◽  
Wei-Min Wu ◽  
Joy D. Van Nostrand ◽  
Ye Deng ◽  
Zhili He ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Vegetable Oil ◽  
Relative Abundance ◽  
Pilot Scale ◽  
Functional Gene ◽  
Functional Genes ◽  
Composition And Structure ◽  
Composition Structure ◽  
And Function

ABSTRACTA pilot-scale field experiment demonstrated that a one-time amendment of emulsified vegetable oil (EVO) reduced groundwater U(VI) concentrations for 1 year in a fast-flowing aquifer. However, little is known about how EVO amendment stimulates the functional gene composition, structure, and dynamics of groundwater microbial communities toward prolonged U(VI) reduction. In this study, we hypothesized that EVO amendment would shift the functional gene composition and structure of groundwater microbial communities and stimulate key functional genes/groups involved in EVO biodegradation and reduction of electron acceptors in the aquifer. To test these hypotheses, groundwater microbial communities after EVO amendment were analyzed using a comprehensive functional gene microarray. Our results showed that EVO amendment stimulated sequential shifts in the functional composition and structure of groundwater microbial communities. Particularly, the relative abundance of key functional genes/groups involved in EVO biodegradation and the reduction of NO3−, Mn(IV), Fe(III), U(VI), and SO42−significantly increased, especially during the active U(VI) reduction period. The relative abundance for some of these key functional genes/groups remained elevated over 9 months. Montel tests suggested that the dynamics in the abundance, composition, and structure of these key functional genes/groups were significantly correlated with groundwater concentrations of acetate, NO3−, Mn(II), Fe(II), U(VI), and SO42−. Our results suggest that EVO amendment stimulated dynamic succession of key functional microbial communities. This study improves our understanding of the composition, structure, and function changes needed for groundwater microbial communities to sustain a long-term U(VI) reduction.

scholarly journals Obtainment of Lignocellulose Degradation Microbial Community: The Effect of Acid-Base Combination After Restrictive Enrichment

2021 ◽  
Author(s):  
Binbin Hua ◽  
Xiaofen Wang ◽  
Zongjun Cui
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
High Throughput Sequencing ◽  
Lignocellulose Degradation ◽  
Community Resources ◽  
Formation Processes ◽  
Acid Base ◽  
Theoretical System ◽  
Structure Changes ◽  
Degradation Ability

Abstract Acid-base combination is used in some cases expecially after restricted enrichment, and has created many lignocellulose-degrading communities. While how it worked is not well understood. In this study, compost was used as inoculum source. Induced community structure changes were analyzed with high throughput sequencing to elucidate the formation processes and determine the mechanisms of acid-base combination. We found that after restricted enrichment, retaining primarily bacteria not only included that could decompose and utilize lignocellulose, such as Clostridium and Pseudomonas, but also synergistic microbiota such as Pseudoxanomonas and Alkalobacillaceae. When the proportion of these two types of bacteria was not balanced, the degradation ability of the microbial community was low or pH changes of it did not compound regular changes , which maybe lead to the failure of restricted enrichment. Microbial communities were re-constituted by acid-base combination, whereby the degrading and synergistic strains were adjusted to a more appropriate proportion. Acid-base combination fixed the instability of microbial communities caused by randomness of restrictive screening enrichment. In this study, the mechanism of acid-base combination was analyzed, which enriched the theoretical system of restricted culture, and provided an effective and controllable technical method for obtaining high-quality lignocellulose-degrading microbial community resources.

scholarly journals Cellulose-Enriched Microbial Communities from Leaf-Cutter Ant (Atta colombica) Refuse Dumps Vary in Taxonomic Composition and Degradation Ability

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0151840 ◽  
Author(s):  
Gina R. Lewin ◽  
Amanda L. Johnson ◽  
Rolando D. Moreira Soto ◽  
Kailene Perry ◽  
Adam J. Book ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Taxonomic Composition ◽  
Refuse Dumps ◽  
Atta Colombica ◽  
Degradation Ability

A peek in the micro-sized world: a review of design principles, engineering tools, and applications of engineered microbial community

2020 ◽  
Vol 48 (2) ◽  
pp. 399-409
Author(s):  
Baizhen Gao ◽  
Rushant Sabnis ◽  
Tommaso Costantini ◽  
Robert Jinkerson ◽  
Qing Sun
Keyword(s):  
Microbial Community ◽  
Microbial Communities ◽  
Environmental Remediation ◽  
Real Life ◽  
Design Principles ◽  
Microbial Interactions ◽  
Potential Applications ◽  
New Gene ◽  
Global Biogeochemical Cycles ◽  
Synthetic Microbial Communities

Microbial communities drive diverse processes that impact nearly everything on this planet, from global biogeochemical cycles to human health. Harnessing the power of these microorganisms could provide solutions to many of the challenges that face society. However, naturally occurring microbial communities are not optimized for anthropogenic use. An emerging area of research is focusing on engineering synthetic microbial communities to carry out predefined functions. Microbial community engineers are applying design principles like top-down and bottom-up approaches to create synthetic microbial communities having a myriad of real-life applications in health care, disease prevention, and environmental remediation. Multiple genetic engineering tools and delivery approaches can be used to ‘knock-in' new gene functions into microbial communities. A systematic study of the microbial interactions, community assembling principles, and engineering tools are necessary for us to understand the microbial community and to better utilize them. Continued analysis and effort are required to further the current and potential applications of synthetic microbial communities.

A Desensitization Bias in Social Judgment: Predicting Others' Emotive Reactions and Making Recommendations after Repeated Exposure

2013 ◽  
Author(s):  
Troy Campbell ◽  
Leaf van Boven ◽  
Ed O'Brien ◽  
Peter Ubel ◽  
Norbert Schwarz
Keyword(s):  
Social Judgment ◽  
Repeated Exposure

The Vegetable Oil Industry of Japan

1919 ◽  
Vol 87 (2258supp) ◽  
pp. 229-229
Keyword(s):  
Vegetable Oil ◽  
Oil Industry

T-RFLP – a representative tool to study pulmonary microbial communities

Pneumologie ◽  
2009 ◽  
Vol 63 (S 01) ◽  
Author(s):  
T Zakharkina ◽  
C Herr ◽  
A Yildirim ◽  
M Friedrich ◽  
R Bals
Keyword(s):  
Microbial Communities

Screening bioactive secondary metabolites from Costa Rican enviromental microbial communities

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
JJ Araya ◽  
M Chavarría ◽  
A Pinto-Tomás ◽  
C Murillo ◽  
L Uribe ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Microbial Communities ◽  
Costa Rican ◽  
Bioactive Secondary Metabolites

Enhanced CO2 concentrations change the structure of Antarctic marine microbial communities

2016 ◽  
Vol 552 ◽  
pp. 93-113 ◽  
Author(s):  
AT Davidson ◽  
J McKinlay ◽  
K Westwood ◽  
PG Thomson ◽  
R van den Enden ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Co2 Concentrations ◽  
Antarctic Marine ◽  
Marine Microbial Communities
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