Bulk-seqregant analysis of Magnesium and calcium over-accumulators in Brassica rapa
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ABSTRACT:
PROVIDER: PRJEB40556 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR4765920_1.fastq.gz | Fastqsanger.gz | |||
| ERR4765920_2.fastq.gz | Fastqsanger.gz | |||
| ERR4765921_1.fastq.gz | Fastqsanger.gz | |||
| ERR4765921_2.fastq.gz | Fastqsanger.gz | |||
| ERR4765922_1.fastq.gz | Fastqsanger.gz |
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Project description:A mapping population of Brassica rapa (BraIRRI, IMB211xR500) was grown under four external calcium and magnesium concentrations in controlled conditions. RNA was extracted and hybridised to the Affymetrix Brassica Exon 1.0 ST array. The aim of the experiment was to identify cis- and trans- expression quantitative trait loci.
2014-05-21 | GSE44185 | GEO
Project description:A mapping population of Brassica rapa (BraIRRI, IMB211xR500) was grown under four external calcium and magnesium concentrations in controlled conditions. RNA was extracted and hybridised to the Affymetrix Brassica Exon 1.0 ST array. The aim of the experiment was to identify cis- and trans- expression quantitative trait loci. In total 279 samples were analysed. The parents of the mapping population were grown at all four treatment levels (LL, HL, LH, HH) with three biological replicates per treatment, plus 12 technical replicates (n=36). A 2x2 combination of external calcium and magnesium concentrations were imposed to give four treatments (LL, HL, LH, HH) as follows: the high (H) concentrations were 3.5 g L-1 (24 mM) CaCl2 and 3.04 g L-1 (15 mM) MgCl2 and the low (L) concentrations were 0.44 g L-1 (3 mM) CaCl2 and 0.2 g L-1 (1 mM) MgCl2 For the mapping population (total = 85 lines), 85 lines were analysed for the LL treatment, 81 lines were analysed for the LH treatment and 65 lines were analysed for the HL treatment. Twelve technical replicates were also analysed.
2014-05-21 | E-GEOD-44185 | biostudies-arrayexpress
Project description:Gene expression profiling in soybean under aluminum stress: mechanisms of magnesium amelioration of aluminum toxicity at gene expression level. Micro-molar concentrations of magnesium in culture solution has been shown to ameliorate Al toxicity in soybean and other leguminous species. Different theories have been proposed to explain the chemical mechanisms of how the two ions interact to neutralize the toxic effect of aluminum in the plant root system. To understand the molecular mechanisms of the phenomenon at the gene expression level in soybean, we undertook a comparative transcriptome analysis in Al-tolerant and Al-sensitive genotypes treated with aluminum alone or aluminum plus magnesium using DNA microarrays. The results revealed magnesium enhances Al-tolerance level in the Al-tolerant genotype by down-regulating genes commonly induced in response to Al toxicity. We hypothesized that the magnesium-mediated alleviation of Al toxicity in the Al-tolerant genotype emanates from reduction in energy expenditure of gene expression induced in response to Al stress. Conversely, magnesium appears to ameliorate Al toxicity in the sensitive genotype by dual mechanisms of increasing the expression level of several genes involved in Al-tolerance and decreasing the expression level of most genes. Keywords: Soybean, aluminum toxicity, magnesium, transcriptome Two genotypes: PI 416937 (p) and Young (y); two treatments: Aluminum (Al) or Al+magnesium (Mg); two time points: 12 and 72 hrs; 3 replicates.
2010-10-04 | E-GEOD-18518 | biostudies-arrayexpress
Project description:Gene expression profiling in soybean under aluminum stress: mechanisms of magnesium amelioration of aluminum toxicity at gene expression level. Micro-molar concentrations of magnesium in culture solution has been shown to ameliorate Al toxicity in soybean and other leguminous species. Different theories have been proposed to explain the chemical mechanisms of how the two ions interact to neutralize the toxic effect of aluminum in the plant root system. To understand the molecular mechanisms of the phenomenon at the gene expression level in soybean, we undertook a comparative transcriptome analysis in Al-tolerant and Al-sensitive genotypes treated with aluminum alone or aluminum plus magnesium using DNA microarrays. The results revealed magnesium enhances Al-tolerance level in the Al-tolerant genotype by down-regulating genes commonly induced in response to Al toxicity. We hypothesized that the magnesium-mediated alleviation of Al toxicity in the Al-tolerant genotype emanates from reduction in energy expenditure of gene expression induced in response to Al stress. Conversely, magnesium appears to ameliorate Al toxicity in the sensitive genotype by dual mechanisms of increasing the expression level of several genes involved in Al-tolerance and decreasing the expression level of most genes. Keywords: Soybean, aluminum toxicity, magnesium, transcriptome
2010-10-04 | GSE18518 | GEO
Project description:Amorphous magnesium-substituted calcium phosphate (AMCP) nanoparticles form constitutively in large numbers in the gastrointestinal tract. Collective evidence indicates that they trap luminal macromolecules, such as bacterial and dietary protein antigen, delivering this cargo to mucosal antigen presenting cells. Here using a precise synthetic mimetic of the AMCP nanomineral, we studied whether trapping of macromolecules by AMCP modulates signalling of the macromolecule itself. Based upon whole genome transcriptomic analyses and using peptidoglycan as a macromolecule, we showed that neither AMCP nanomineral itself regulated any gene, nor did it modify any gene regulation by peptidoglycan. We conclude that synthetic AMCP nanomineral can deliver macromolecular cargo intracellularly without affecting gene transcription.
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Project description:B. pertussis GMT-1 was grown in media containing magnesium sulfate to put the culture in the Bvg- phase. The cells were then washed and grown in media lacking magnesium sulfate and samples were harvested at time=0 and several time points beyond.
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Project description:Martian regolith (unconsolidated surface material) is a potential medium for plant growth in bioregenerative life support systems during manned missions on Mars. However, hydrated magnesium sulfate mineral levels in the regolith of Mars can reach as high as 10 wt%, and would be expected to be highly inhibitory to plant growth. A global approach was used to identify novel genes with potential to enhance tolerance to high MgSO4 stress. The early Arabidopsis root transcriptome response to elevated concentrations of magnesium sulfate was characterized in col-0, and also between col-0 and the mutant line cax1-1 – a mutant relatively tolerant of high levels of MgSO4•7H2O in soil solution. After 3 weeks of growth under hydroponic conditions, Arabidopsis thaliana col-0 roots were exposed to a basic nutrient solution (0.25 g/L MES, 1/16x MS, pH 5.7) with an additional 2.08 mM magnesium sulfate (total Ca:Mg ratio = 1:15) for 45 min., 90 min., or 180 min., while a col-0 control set was exposed to the basic nutrient solution without additional magnesium sulfate for 45 minutes. Arabidopsis thaliana cax1-1 roots were exposed to the basic nutrient solution with additional magnesium sulfate for 180 min. only. Four replicate containers were harvested for the control and each of the treatment sets, resulting in a total of 20 samples. Gene expression of the col-0 sets exposed to magnesium sulfate treatment for 45 min., 90 min., or 180 min. was compared to gene expression of the col-0 control set. Gene expression of the cax1-1 set exposed to magnesium sulfate treatment for 180 min. was compared to gene expression of the col-0 set exposed to magnesium sulfate treatment for 180 minutes.
2010-09-17 | E-GEOD-20109 | biostudies-arrayexpress
Project description:In many Gram-negative bacteria, the stress sigma factor of RNA polymerase, σS/RpoS, remodels global gene expression to reshape the physiology of quiescent cells and ensure their survival under non-optimal growth conditions. In the foodborne pathogen Salmonella enterica serovar Typhimurium, σS is also required for biofilm formation and virulence. We have recently shown that a ΔrpoS mutation affects the magnesium content of Salmonella and expression of the primary Mg2+-transporter CorA. The other two Mg2+-transporters of Salmonella are encoded by the PhoP-activated mgtA and mgtB genes expressed under magnesium starvation, whereas the corA gene is expressed constitutively. The σS control of corA prompted us to evaluate the impact CorA in quiescent Salmonella cells, by using global and analytical proteomic analyses and physiological assays. The ΔcorA mutation conferred a competitive disadvantage to exit from stationary phase, and slightly impaired motility, but had no effect on total and free cellular magnesium contents. In contrast to the wild type strain, the ΔcorA mutant produced MgtA, but not MgtB, in the presence of high extracellular magnesium concentration. Under these conditions, MgtA production in the ΔcorA mutant did not require PhoP and, consistently, a ΔmgtA, but not a ΔphoP, mutation slightly reduced the magnesium content of the ΔcorA mutant. Nevertheless, the ΔphoP mutation strongly impaired growth and motility, in the absence of CorA only and independently of the extracellular magnesium concentration, unraveling the importance of PhoP-dependent functions in the absence of CorA. Under these conditions, several proteins involved in flagella formation, chemotaxis and secretion were affected by the ΔcorA and ΔphoP mutations in combination, but not alone. Altogether, our data pinpoint a regulatory network, where the absence of CorA is sensed and its physiological consequences alleviated by induction of MgtA- and PhoP- dependent compensatory mechanisms.
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Project description:For investigation of the pathology associated to Doxorubicin-induced cardiotoxicity and the therapeutic mechanism enabled by Dexrazoxane and synthetic Magnesium Hexacyanoferrate Nanocatalyst.
2022-09-26 | GSE213983 | GEO
Project description:The distal convoluted tubule (DCT) plays a key role in the fine-tuning of renal Mg2+ reabsorption. In recent years, hereditary magnesium (Mg2+) transport disorders have helped to identify important players in DCT Mg2+ homeostasis. Here, we report the Mg2+-sensitive transcriptional expression of the DCT transcriptome using gene expression microarray analysis. Mice expressing eGFP under a DCT-specific promoter were subjected to Mg2+-deficient or Mg2+-enriched diets. Subsequently, the Complex Object Parametric Analyzer and Sorter (COPAS) allowed isolation of eGFP-positive DCT cells. RNA extracts were subjected to pair-wise microarray analysis, high vs. low Mg2+. Of all genes in the genome, 46 were shown to be differentially expressed with a minimal fold-change of 2. Several known magnesiotropic genes, such as Trpm6 and Parvalbumin, were upregulated in the low Mg2+ fraction. Moreover, new genes were identified that are potentially involved in renal Mg2+ homeostasis. To confirm that the selected candidate genes are regulated by dietary Mg2+ availability, the expression levels of Slc41a3, Pcbd1, Tbc1d4 and Umod were determined by RT-PCR analysis. Indeed, all four genes were shown to be significantly upregulated in mice fed the Mg2+-deficient diet. In conclusion, by elucidating the Mg2+-sensitive DCT transcriptome, new candidate players in renal Mg2+ homeostasis were identified. RNA samples were isolated from PV-eGFP-positive tubules from mice fed on a low (L-samples) or high (H-samples) magnesium diet. Littermate H and L samples were labeled and put on mouse microarrays together. Two of the four sample sets were analyzed in dye-swap to compensate for dye-biases.
2013-12-13 | E-GEOD-40208 | biostudies-arrayexpress