TIDE 16S
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB12902 | ENA |
REPOSITORIES: ENA
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Project description:Salt marshes provide many key ecosystem services that have tremendous ecological and economic value. One critical service is the removal of fixed nitrogen from coastal waters, which limits the negative effects of eutrophication resulting from increased nutrient supply. Nutrient enrichment of salt marsh sediments results in higher rates of nitrogen cycling and, commonly, a concurrent increase in the flux of nitrous oxide, an important greenhouse gas. Little is known, however, regarding controls on the microbial communities that contribute to nitrous oxide fluxes in marsh sediments. To address this disconnect, we generated microbial community profiles as well as directly assayed nitrogen cycling genes that encode the enzymes responsible for overall nitrous oxide flux from salt marsh sediments. We hypothesized that communities of microbes responsible for nitrogen transformations will be structured by nitrogen availability. Taxa that respond positively to high nitrogen inputs may be responsible for the elevated rates of nitrogen cycling processes measured in fertilized sediments. Our data show that, with the exception of ammonia-oxidizing archaea, the community composition of organisms responsible for production and consumption of nitrous oxide was altered under nutrient enrichment. These results suggest that elevated rates of nitrous oxide production and consumption are the result of changes in community structure, not simply changes in microbial activity.
2018-01-13 | GSE108888 | GEO
Project description:Functional redundancy in bacterial communities is expected to allow microbial assemblages to survive perturbation by allowing continuity in function despite compositional changes in communities. Recent evidence suggests, however, that microbial communities change both composition and function as a result of disturbance. We present evidence for a third response: resistance. We examined microbial community response to perturbation caused by nutrient enrichment in salt marsh sediments using deep pyrosequencing of 16S rRNA and functional gene microarrays targeting the nirS gene. Composition of the microbial community, as demonstrated by both genes, was unaffected by significant variations in external nutrient supply, despite demonstrable and diverse nutrient–induced changes in many aspects of marsh ecology. The lack of response to external forcing demonstrates a remarkable uncoupling between microbial composition and ecosystem-level biogeochemical processes and suggests that sediment microbial communities are able to resist some forms of perturbation. nirS gene diversity from two salt marsh experiments, GSM (4 treatments, 8 samples, duplicate arrays, four replicate blocks per array, 8 arrays per slide) and PIE (2 treatments, 16 samples, duplicate arrays four replicate blocks per array, 8 arrays per slide)
2010-11-13 | E-GEOD-25227 | biostudies-arrayexpress
Project description:Functional redundancy in bacterial communities is expected to allow microbial assemblages to survive perturbation by allowing continuity in function despite compositional changes in communities. Recent evidence suggests, however, that microbial communities change both composition and function as a result of disturbance. We present evidence for a third response: resistance. We examined microbial community response to perturbation caused by nutrient enrichment in salt marsh sediments using deep pyrosequencing of 16S rRNA and functional gene microarrays targeting the nirS gene. Composition of the microbial community, as demonstrated by both genes, was unaffected by significant variations in external nutrient supply, despite demonstrable and diverse nutrient–induced changes in many aspects of marsh ecology. The lack of response to external forcing demonstrates a remarkable uncoupling between microbial composition and ecosystem-level biogeochemical processes and suggests that sediment microbial communities are able to resist some forms of perturbation.
2010-11-13 | GSE25227 | GEO
Project description:Vibrio natriegens is a rapidly growing salt marsh bacterium that is being developed as a synthetic biology chassis. We characterized its physiological response to different salinities and temperatures in order to optimize culturing conditions and understand its adaptations to a salt marsh environment. Using metabolomics, transcriptomics, and proteomics we determined what pathways respond to these environmental parameters. We found that organic osmolyte synthesis and membrane transporters were most responsive to changes in salinity. The primary osmolytes were glutamate, glutamine, and ectoine, responding to salinity across temperature treatments. However, when media was supplemented with choline, glycine betaine seemed to mostly replace ectoine. These results provide a baseline dataset of metabolic activity under a variety of conditions that will inform decisions made about culturing and genome engineering for future applications.
2021-09-15 | PXD027874 | Pride
Project description:After transcription, a messenger RNA (mRNA) is further post-transcriptionally regulated by several features including RNA secondary structure and covalent RNA modifications (specifically N6-methyladenosine, m6A). Both RNA secondary structure and m6A have been demonstrated to regulate mRNA stability and translation as well as have been independently linked to plant response to excess salt concentrations in the soil. However, the effect of m6A on regulating RNA secondary structure and the combinatorial interplay between these two RNA features during salt stress response has yet to be studied. Here, we globally identify RNA-protein interactions and RNA secondary structure during systemic salt stress. This analysis reveals that RNA secondary structure is highly dynamic during salt stress, which is independent of changes in RNA-protein interactions. Conversely, we find that m6A is anti-correlated with RNA secondary structure in a condition-specific manner, with salt-specific m6A resulting in a decrease in mRNA secondary structure during salt stress. Remarkably, we show that the combination of salt-specific m6A deposition and the associated loss of RNA secondary structure results in increases in mRNA stability and translation of transcripts encoding proteins involved in responses to abiotic stresses. In total, our comprehensive analyses reveal an important epitranscriptome, secondary structure-mediated post-transcriptional regulatory mechanism involved in plant long-term salt stress response and adaptation.
2020-04-01 | GSE147812 | GEO
Project description:We employed Structure-seq2 method to probe RNA structure genome-wide in Arabidopsis shoot and root tissue separately and investigate the effect of salt stress on the RNA structurome in vivo.
2020-01-29 | GSE124866 | GEO
Project description:Salt marsh cyanobacteria
| PRJNA19325 | ENA
Project description:Divided into four groups,CTL,Salt,(S+B),B.CTL group was fed with normal salt diets for 4 weeks,Salt group were fed with high salt diets(5% NaCl)for 4 weeks,(S+B)group were fed with high salt diets mixed with buckwheat (1:1)for 4 weeks ,B group: first fed high salt diets for 4 weeks and then fed with buckwheat for 4 weeks. Extract mouse gastric flora DNA and sequence.
2019-06-10 | GSE132412 | GEO
Project description:Time series metasecretomes (weeks 1, 3, 5 and ten) of lignocellulose responsive microbiomes enriching on Spartina anglica biomass for 16 weeks in a natural UK salt marsh (Welwick, Humber estuary).
2019-05-29 | MSV000083872 | MassIVE