Identification of glutamine-regulated genes in Arabidopsis seedlings
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ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE206966 | GEO | 2022/12/10
REPOSITORIES: GEO
Similar Datasets
Project description:ra05-09_urea - urea - What are the transcriptomic plant responses to urea nitrogen supply ? - Columbia Arabidopsis ecotype were grown hydroponically on 0.5 mM NH4NO3 as sole nitrogen source during 35 days under short days. Plants were then placed on 3 nutrient solutions supplemented, either with 1 mM NH4NO3, or with 0.5 mM NH4NO3 + 0.5 mM Urea, or with 1 mM Urea. Root and shoot samples were harvested separately 7 days after these different nitrogen treatments Keywords: treated vs untreated comparison
2007-10-16 | GSE9258 | GEO
Project description:To understand the global effect of Gln on gene expression, we performed RNA-seq analysis to compare the gene expression profiles between Arabidopsis seedlings treated with Gln for 0hr and 0.5hr.
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Project description:wild-type seedlings were grown on NH4NO3 or Urea as nitrogen source
2009-03-01 | E-MEXP-1771 | biostudies-arrayexpress
Project description:Columbia Arabidopsis ecotype were grown hydroponically on 1 mM NH4NO3 as sole nitrogen source during 35 days under short days. Plants leaves were then sprayed with a seaweed extract or with water (control). Root and shoot samples were harvested separately 1 hour and 7 days after this spraying.
2007-01-26 | E-MEXP-573 | biostudies-arrayexpress
Project description:Osteolytic lesions with suppression of osteoblastic (OB) differentiation are hallmarks of multiple myeloma (MM). Most recently, Gln availability has been found to be essential to sustain bone mass formation in murine models. On the other hand, MM cells are Gln-addicted and consume huge amounts of the amino acid, leading to a partial Gln depletion in the bone marrow (BM) plasma. We hypothesize that MM-dependent Gln depletion contributes to the defective OB differentiation characteristic of MM. Conversely, GLS (both KGA and GAC isoforms) and SLC38A2, the gene for the concentrative Gln transporter SNAT2, were induced. Consistent with this conclusion, the activity of SNAT2 was absent in undifferentiated hMSCs but well detectable after 14 days of OB differentiation, when total Gln uptake was also increased. Under the same conditions, OB differentiation markers (RUNX2, COL1A1, ALPL expression and ALPL activity or staining) were significantly induced but their expression was blunted by incubation in low-Gln (0.4 mM) medium or in the presence of the SNAT2 inhibitor MeAIB. The incubation in Gln-free D-MEM suppressed the induction of GLS and SLC38A2 along with OB differentiation, which was restored by the supplementation of Non-Essential Amino Acids (NEAA). Among NEAA, only asparagine (Asn) was able to rescue OB differentiation in the absence of Gln. The determination of intracellular amino acids with MS indicated that OB differentiation was associated with the increase of cell Asn, without significant changes of Gln, glutamate (Glu) or aspartate (Asp). Asparagine Synthetase (ASNS), the Gln-dependent enzyme that accounts for Asn synthesis, was also found induced during OB differentiation of hMSCs. Gene Expression Profiles of primary BM hMSCs and OBs from bone biopsies of both healthy donors and MM patients indicated that GLS, ASNS, and SLC38A2 are more expressed in OBs, while the expression of GLUL, the gene for GS, is higher in undifferentiated hMSCs from healthy donors. Overall, these results indicate that (1) OB differentiation of hMSCs is Gln-dependent; (2) the partial Gln depletion, imposed by Gln-addicted MM cells in the BM microenvironment, contributes to the impairment of osteoblastic differentiation of hMSCs; (3) hindrance of differentiation may depend on the limited availability of intracellular Asn derived from Gln-dependent ASNS. These results support the evidence that Gln addiction of MM cells affects bone microenvironment leading to the inhibition of OB differentiation and, consequently, to the development of MM bone disease.
2020-12-01 | GSE147791 | GEO
Project description:High levels of ammonium as the sole nitrogen source impairs plant growth, i.e. ammonium toxicity, the primary cause of which remains to be determined. To obtain a clue about the toxic mechanism, we compared genome-wide gene expression between the wild-type (Col) and NRT1.1-knockout mutant (chl1-5, nrt1.1) seedlings growing in media containing toxic levels of ammonium as the sole nitrogen source.
2023-10-31 | E-MTAB-13395 | biostudies-arrayexpress
Project description:A. thaliana seeds of Columbia (Col-0) ecotype were surface-sterilized, plated on designated media and vernalized for 48 hours at 8C. Plants were grown semi-hydroponically under 16-hr-light, 8-hr-dark cycles at a constant temperature of 23C on basal Murashige and Skoog medium supplemented with 2 mM KNO3, 2 mM NH4NO3 and 30 mM sucrose. Two-week-old seedlings were transferred to fresh MS media without nitrogen and sucrose and dark-adapted for 48 hours. To perform specific metabolic treatments manipulating availability of source of carbon (C) and illumination (L): -C-L, +C-L, -C+L, +C+L, two-week-old seedlings were transferred to fresh MS medium containing 0% or 1% sucrose and either placed back into the dark or illuminated with white light for an additional 8 hours. The various treatments were compared to one another using the treatment of -C-L as the background treatment to which all other treatments (-C+L, +C-L, +C+L) were compared.
2004-01-23 | E-MEXP-71 | biostudies-arrayexpress
Project description:Seedlings are grown on a mesh covering MS media without carbon source, and subsequently transferred at 9 DAS to control media without sucrose or medium supplemented with 15 mM sucrose. 3 hours and 24 hours after transfer, seedlings were harvested and the third leaf micro-dissected for RNA extraction.
2017-12-14 | E-MTAB-4262 | biostudies-arrayexpress
Project description:ngs2020_24_era-nitrogen-What genes are affected in the era1 mutant compared to the WT?-Characterize the effect of nitrogen nutrition (0 mM, 2mM and 10 mM NH4NO3) on development and metabolism in era1 and WT at the rosette stage at the onset of flower bud. Library construction with Quantseq 3seq sequencing
2023-02-08 | GSE208151 | GEO
Project description:Algal biofuel production requires an input of synthetic nitrogen fertilizer. Fertilizer synthesized via the Haber-Bosch process produces CO2 as a waste by-product and represents a substantial financial and energy investment. Reliance on synthetic fertilizer attenuates the environmental significance and economic viability of algae production systems. To lower fertilizer input, the waste streams of algal production systems can be recycled to provide alternative sources of nitrogen such as amino acids to the algae. The halophytic green alga Dunaliella viridis can use ammonium (NH4+) derived from the abiotic degradation of amino acids, and previously, supplementation of NH4+ from glutamine (GLN) degradation was shown to support acceptable levels of growth and increased neutral lipid production compared to nitrate. To understand the effect of glutamine-released NH4+ on algae growth and physiology, metabolite levels, growth parameters, and transcript profiles of D. viridis cultures were observed in a time course after transition from media containing nitrate as a sole N source to medium containing GLN, glutamate (GLU), or a N-depleted medium. Growth parameters were similar between GLN (NH4+) and nitrate supplemented cultures, however, metabolite data showed that the GLN supplemented cultures (NH4+) more closely resembled cultures under nitrogen starvation (N-depleted and GLU supplementation). Neutral lipid accumulation was the same in nitrate and glutamine-derived NH4+ cultures. However, glutamine-derived NH4+ caused a transcriptional response in the immediate hours after inoculation of the culture. The strong initial response of cultures to NH4+ changed over the course of days to closely resemble that of nitrogen starvation. These observations suggest that release of NH4+ from glutamine was sufficient to maintain growth, but not high enough to trigger a cell transition to a nitrogen replete state. Comparative transcript profiling of the nitrogen-starved and nitrate-supplied cultures show an overall downregulation of fatty acid synthesis and a shift to starch synthesis and accumulation. The results indicate that a continuous, amino acid derived slow release of NH4+ to algae cultures could reduce the amount of synthetic nitrogen needed for growth, but optimization is needed to balance nitrogen starvation and cell division.
2018-03-30 | GSE111548 | GEO