Expression profile of R. capsulatus by entering light after a dark period; and by high light intensity
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PROVIDER: PRJNA486347 | ENA |
REPOSITORIES: ENA
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Project description:The effects of low and high light intensities on transcriptome of purple non sulfur bacterium R. capsulatus were investigated by comparing expression profiles of dark and low light intensity (2000 lux), and by comparing high light intensity (10,000 lux) with low light intensity (2000 lux).
2018-08-17 | GSE118650 | GEO
Project description:We investigated the transcriptional response of cand. Pelagibacter ubique cultures to light and dark when grown under carbon replete and deplete conditions. Results: During exponential phase, few genes were differentially transcribed between light:dark growth conditions. In stationary phase, a high proportion (9.7%) of coding sequences were found differentially expressed between treatments; 4.7% being up-regulated in the light (n=64) and 4.9% being up-regulated in the dark (n=67). Several components of the oxidative phosphorylation pathway were up-regulated in the dark, supporting physiological data showing higher respiration rates in darkness than in the light under starvation conditions. We also observed up-regulation of a proton translocating pyrophosphate synthase (SAR11_1040), which may be an additional energy production mechanism utilized by SAR11 cells in the dark. Finally, we noted the up-regulation of pili formation genes in the array data, consistent with the observation of pili in dark grown cells via electron microscopy.
2011-12-31 | GSE24134 | GEO
Project description:FER-regulated genes under moderate intensity light
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Project description:Col-0 and fer-4 seedlings grown for 7 d under moderate intensity light (150 PFD) were used for RNA-sequencing
2021-04-20 | GSE172298 | GEO
Project description:Genome wide rhythmic transcription under light/dark cycles is associated with sequential transcription of specific biological processes genes in Ostreococcus tauri. Transcriptional profiling of Ostreococcus tauri under light/dark cycles. In order to identify genes with a diurnal rhythm, cells entrained under 12:12 light/dark cycles were sampled every 3 hours for 27 hours with two overlapping time points at Time 9 (Light ON at Time 9; Light OFF at Time 21) in 3 independent experiments.
2010-04-20 | GSE16422 | GEO
Project description:The acclimation of plants to environmental factors (light/temperature/nutrient availability) plays a crucial role in determining their tolerance to stress their ability to compete with other plants and the efficiency with which external inputs are used for growth and productivity. Some of the clearest responses involve the major modifications in the composition of the photosynthetic apparatus in response to light intensity. Photosynthetic acclimation. The acclimation response involves changes in the abundance of a large number of proteins in different cell compartments occurring at different intensity thresholds. The signal transduction chain is complex and involves crosstalk between redox control and other pathways that control photosynthetic gene expression but is poorly understood. Over the past 7 years we have laid the foundations for a molecular genetic approach by characterising the responses of Arabidopsis thaliana to growth in and transfer between high and low light conditions(1-6). Arabidopsis exhibits all the key features of photosynthetic acclimation: changes in maximum photosynthetic rate in leaf structure and in the levels of light-harvesting complexes photosystems and enzymes of carbon metabolism. Method: Samples A-1, A-2 and A-3 were grown at a light intensity of 400 umol.m-2.s-1 until rosette growth was complete. Plants for samples A-2 and A-3 were then transferred to 100 umol.m-2.s-1. Samples A-4, A-5 and A-6 were grown at 100umol.m-2.s-1 until rosette growth was complete, when plants for samples A-5 and A-6 were transferred to 400 umol.m-2.s-1. Samples were taken 24 hours after transfer to the different light intensity and samples A-3 and A-6 were taken 72 hours after transfer. Keywords: Photosynthesis
2007-01-22 | GSE6163 | GEO
Project description:We have reported that JMJ17 act as a repressor to a set of genes involved in photosynthesis, tetrapyrrole biosynthesis and light response related development in the dark, while during dark to light irradiation it acts as an activator of same set of genes.
2019-11-14 | GSE140296 | GEO
Project description:We investigated differences in gene expression in left ventricular tissue from WT and ΔKPQ (Scn5aΔ/+) mice. Tissue was collected diurnally at the phase transitions from dark to light (D:L) and light to dark (L:D). We employed RNAseq (Novogene) to examine potential variances between the two strains of mice, as well as, any differences in expression at the two time points. RNAseq provided a snapshot of gene expression which revealed an intact molecular clock for both strains. Previous studies have demonstrated circadian peak or trough at the light phase changes in cardiac tissue in mice for many core molecular clock components. Similar to these studies both strains demonstrated a significant difference in expression between core molecular clock genes Bmal1, Clock, Per1, Per2, Per3 assessed at the phase transitions. This assessment revealed 39 diurnally expressed genes. To our surprise, only 6 genes were differently expressed between the two strains of mice.
2020-03-06 | GSE146405 | GEO
Project description:We investigated the transcriptional response of cand. Pelagibacter ubique cultures to light and dark when grown under carbon replete and deplete conditions. Results: During exponential phase, few genes were differentially transcribed between light:dark growth conditions. In stationary phase, a high proportion (9.7%) of coding sequences were found differentially expressed between treatments; 4.7% being up-regulated in the light (n=64) and 4.9% being up-regulated in the dark (n=67). Several components of the oxidative phosphorylation pathway were up-regulated in the dark, supporting physiological data showing higher respiration rates in darkness than in the light under starvation conditions. We also observed up-regulation of a proton translocating pyrophosphate synthase (SAR11_1040), which may be an additional energy production mechanism utilized by SAR11 cells in the dark. Finally, we noted the up-regulation of pili formation genes in the array data, consistent with the observation of pili in dark grown cells via electron microscopy. Triplicate biological replicates were collected from five growth conditions (n=15 total): 1) exponential phase, 24 hour light (n=3) 2) exponential phase, 24 hour dark (n=3) 3) stationary phase, 12:12 hour light:dark cycles (n=3) 4) stationary phase, 24 hour dark (n=3) 5) stationary phase, 6 hours after transfer to darkness (n=3)
2011-12-31 | E-GEOD-24134 | biostudies-arrayexpress
Project description:rs08-02_nad. Dark and light. Establish which transcripts are affected by changes in NAD concentration, and whether this depends on light/dark. Three genotypes: Two lines of Arabidopsis transformed to overexpress QPRT, an enzyme involved in NAD synthesis (NadC4.11 and NadC15.3) and a third control line transformed with an empty vector (162). Leaf discs from the two lines of the QPRT+ plants were incubated with quinolinate, the QPRT substrate, to boost leaf NAD. Discs from the empty vector control were incubated on a buffer withour quinolinate. The experiment was performed in the light and the dark. The aim is to compare the QPRT+ quinolinate samples with the empty vector samples, both for the sample series generated in the light and that generated in the dark. Keywords: treated vs untreated comparison
2009-11-01 | GSE15599 | GEO