Uncultured bacterium
Ontology highlight
ABSTRACT:
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| DRR021932.fastq.gz | Fastqsanger.gz | |||
| DRR021933.fastq.gz | Fastqsanger.gz | |||
| DRR021934.fastq.gz | Fastqsanger.gz | |||
| DRR021935.fastq.gz | Fastqsanger.gz | |||
| DRR021936.fastq.gz | Fastqsanger.gz |
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Project description:Microbes play key roles in diverse biogeochemical processes including nutrient cycling. However, responses of soil microbial community at the functional gene level to long-term fertilization, especially integrated fertilization (chemical combined with organic fertilization) remain unclear. Here we used microarray-based GeoChip techniques to explore the shifts of soil microbial functional community in a nutrient-poor paddy soil with long-term (21 years).The long-term fertilization experiment site (set up in 1990) was located in Taoyuan agro-ecosystem research station (28°55’N, 111°27’E), Chinese Academy of Sciences, Hunan Province, China, with a double-cropped rice system. fertilization at various regimes.
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Project description:Elevated CO2 alternate the community structure of rice root-associated bacteria
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Project description:Rice has evolved regulatory programs and specialized cell types that allow the plant to withstand different environments. To understand how rice root systems cope with water stresses, we profiled translatomes (ribosome-associated mRNAs) and accessible chromatin of developmentally-defined root cell populations from well-watered and drained control (aerobic control), water deficit, waterlogged, fully submerged plants and recovery conditions. Whereas, the waterlogging responses are limited to specific root domains, water deficit and submergence signatures are extensive, and mostly reversible after 1 day of recovery, relative to control roots. Root systems were also evaluated in rice cultivated in a paddy field. Specific responses include a halt in the cell-cycle and DNA synthesis-related genes translation in meristematic tissue under submergence and exo/endodermis suberin-related pathways bolstering under water deficit. Chromatin accessibility and translatome data integration was used to generate inferred regulatory networks that are dynamically regulated by changing water availability. The data collection is further enriched by translatome and chromatin accessibility data for the root systems of plate-grown seedlings (7 day old) and those cultivated in a paddy field (49 day old). An atlas of eight cell population translatomes for field-grown plants exhibited robust cell type expression. Collectively, these data for specific cell populations at multiple developmental ages and in multiple environments including growth two limiting water stresses will serve as a community resource.
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Project description:Sulfate-reducing bacteria (SRB) colonize the guts of ~50% of humans. We used genome-wide transposon mutagenesis and insertion-site sequencing (INSeq), RNA-Seq, plus mass spectrometry to characterize genetic and environmental factors that impact the niche of Desulfovibrio piger, the most common SRB in a surveyed cohort of healthy USA adults. Gnotobiotic mice were colonized with an assemblage of sequenced human gut bacterial species with or without D. piger and fed diets with different levels and types of carbohydrates and sulfur sources. Diet was a major determinant of functions expressed by this artificial 9-member community and of the genes that impact D. piger fitness; the latter includes high- and low-affinity systems for utilizing ammonia, a limiting resource for D. piger in mice consuming a polysaccharide-rich diet. While genes involved in hydrogen consumption and sulfate reduction are necessary for its colonization, varying dietary free sulfate levels did not significantly alter levels of D. piger, which can obtain sulfate from the host in part via cross-feeding mediated by Bacteroides-encoded sulfatases. Chondroitin sulfate, a common dietary supplement, increased D. piger and H2S levels without compromising gut barrier integrity. A chondroitin sulfate-supplemented diet together with D. piger impacted the assemblage’s substrate utilization preferences, allowing consumption of more reduced carbon sources, and increasing the abundance of the H2-producing Actinobacterium, Collinsella aerofaciens. Our findings provide genetic and metabolic details of how this H2-consuming SRB shapes the responses of a microbiota to diet ingredients, and a framework for examining how individuals lacking D. piger differ from those that harbor it. 8 samples total, 2 gropus of 4 mice: Proximal colon gene expression profiles of gnotobiotic mice colonized with an artificial gut community composed of 8 human gut species (group 1: NoDp) and from mice colonized with the same community plus D. piger (Dp). Mice were fed a HF/HS diet supplemented with 3% chondroitin sulfate. Animals were sacrificed 2 weeks after colonization
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Project description:Fertilization changes compositional variation of paddy bacterial community
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2013-01-09 | E-GEOD-36696 | biostudies-arrayexpress
Project description:Soil bacterial community Targeted Locus/Loci
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