Sigaus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA261083 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1575330.fastq.gz | Fastqsanger.gz | |||
| SRR1575331.fastq.gz | Fastqsanger.gz | |||
| SRR1575322.fastq.gz | Fastqsanger.gz | |||
| SRR1575332.fastq.gz | Fastqsanger.gz | |||
| SRR1575323.fastq.gz | Fastqsanger.gz |
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Project description:Purpose: To understand how D654Y mutated RpoB affect gene expression under either normal or osmotic stress conditions in Escherichia coli . Methods: RNA-seq libraries were constructed for four samples, including (I) The parental strain Suc-T110 grown at normal condition (5%w/v glucose); (II)RpoB mutant RpoBD645Y [Suc-T110::rpoB (D654Y), RNA-seq library named NZ-502] grown at normal condition;(III) Suc-T110 grown at osmotic stress condition(12%w/v glucose);(IV) NZ-502 grown at osmotic stress condition. For preparation of RNA samples, Fresh colonies were picked from New NBS mineral salts plates containing 20 g liter-1 glucose, inoculated into 250 ml flasks containing 30 ml NBS mineral salts medium with 20 g liter-1 glucose, and grown at 37°C and 250 rpm for 12 h. Cultures were then transferred to a 500 ml fermentation vessel containing 250 ml NBS mineral salts medium with either 5%w/v or 12%w/v glucose. After 48 h, 1 ml culture was harvested by centrifugation, frozen in liquid nitrogen and sent to Beijing Genomics Institute (BGI, Shenzhen, China). The four 90-nt paired-end RNA-seq libraries were generated commercially at Beijing Genomics Institute by using the HiSeq™ 2000 platform. Sequencing data was handled essentially with Bowtie2, NOIseq. Expression levels are presented as Reads Per Kilobase of transcript per Million mapped reads (RPKM). Results: we first comparative accessed expression levels of Suc-T110 and NZ-502 under normal condition. Among the 4200 predicted genes, 128 genes were found altered their expression in NZ502 compared with Suc-T110; with 38 targets specific up-regulated while 90 targets down-regulated. Genes engaged in biological function of amino acid metabolism (P-value=4.60E-05) were significantly enriched among in induced gene set. Under osmotic stress condition, 244 differential expressed genes were identified in NZ-502 when compared with Suc-T110, with 132 targets specific up-regulated while 112 targets down-regulated, Functional enrichment of 132 up regulated genes showed the most significantly enriched physiological function of NZ-502 upon hyperosmotic stress was associated with carbon source transportation (FunCat term: 20.01.03 C-compound and carbohydrate transport, P-value=9.51E-05), which containing a group of genes encoding diverse sugar transporters. Conclusions: Transcriptome profiling suggested that derepression of sugar transporters might be the primary cause for NZ-502 to resist osmotic stress.
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Project description:Land cover change has long been recognized that marked effect the amount of soil organic carbon. However, little is known about microbial-mediated effect processes and mechanism on soil organic carbon. In this study, the soil samples in a degenerated succession from alpine meadow to alpine steppe meadow in Qinghai-Tibetan Plateau degenerated, were analyzed by using GeoChip functional gene arrays.
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Project description:Using WGBS we investigated blood DNA methylation profiles of Cooinda the Alpine dingo and determined putative regulatory elements (unmethylated regions, UMRs, and lowly methylated regions, LMRs).
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Project description:Comparative gene expression profiling of a) above-ground tissues of three fruiting species (P. cheesemanii, ch, P. exile, ex, P. novae-zelandiae, nz), b) above-ground tissues of two rosette stage species (P. fastigiatum, fa, P. enysii, en) and c) roots of all five species using heterologous A. thaliana microarrays
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Project description:Arctic alpine species experience extended periods of cold and unpredictable conditions during flowering. Thus, often, alpine plants use both sexual and asexual means of reproduction to maximise fitness and ensure reproductive success. We used the arctic alpine perennial Arabis alpina to explore the role of prolonged cold exposure on adventitious rooting. We exposed plants to 4 °C for different durations and scored the presence of adventitious roots on the main stem and axillary branches. Our physiological studies demonstrated the presence of adventitious roots after 21 weeks at 4 °C saturating the effect of cold on this process. Notably, adventitious roots on the main stem developingin specific internodes allowed us to identify the gene regulatory network involved in the formation of adventitious roots in cold using transcriptomics. These data and histological studies indicated that adventitious roots in A. alpina stems initiate during cold exposure and emerge after plants experience growth promoting conditions. While the initiation of adventitious root was not associated with changes of DR5 auxin response and free endogenous auxin level in the stems, the emergence of the adventitious root primordia was. Using the transcriptomic data, we discerned the sequential hormone responses occurring in various stages of adventitious root formation and identified supplementary pathways putatively involved in adventitious root emergence, such as glucosinolate metabolism. Together, our results highlight the role of low temperature during clonal growth in alpine plants and provide insights on the molecular mechanisms involved at distinct stages of adventitious rooting.
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Project description:Alpine goat phenotypes for quality components have been routinely recorded for many years and deposited in the Council on Dairy Cattle Breeding (CDCB) repository. The data collected were used to conduct an exploratory genome-wide association study (GWAS) from 72 female Alpine goats originating from locations throughout the U.S. Genotypes were identified with the Illumina Goat 50K single nucleotide polymorphisms (SNP) Beadchip. The analysis used a polygenic model where the dropping criteria was the Call Rate ≥ 0.95. The initial dataset was composed of ~ 60,000 rows of SNPs, 21 columns of phenotypic traits and composed of 53,384 scaffolds containing other informative data points used for genomic predictive power. Phenotypic association with the 50KBeadchip revealed 26,074 reads of candidate genes. These candidate genes segregated as separate novel SNPs and were identified as statistically significant regions for genome and chromosome level trait associations. Candidate genes associated differently for each of the following phenotypic traits: test day milk yield (13,469 candidate genes), test day protein yield (25,690 candidate genes), test day fat yield (25,690 candidate genes), percentage protein (25,690 candidate genes), percentage fat (25,690 candidate genes), and percentage lactose content (25,690 candidate genes). The outcome of this study supports elucidation of novel genes that are important for livestock species in association to key phenotypic traits. Validation towards the development of marker-based selection that provide precision breeding methods will thereby increase breeding value. Specific aims: 1) Improve on contributions to the phenotype repository, the Council on Dairy Cattle Breeding (CDCB) for milk quality traits that are economically important for goat production while developing a corresponding DNA repository for each of the animals with significant genotype-phenotype associations. 2) Develop genomic prediction tools and provide data for a better database for tools to predict phenotypic traits by initially using the high density Goat50KSNP BeadChip for the selection of more specific SNPs associated with select signatures (genes) for phenotypic traits in American Alpine goats. 3) To establish whether a low number of goat subjects (< 300 goats) will provide statistically significant (p < 0.05) predictive capabilities for desired breeding traits in American Alpine dairy goats.
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