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Phaeodactylum tricornutum

ABSTRACT: Transcriptional response of the marine pennate diatom Phaeodactylum tricornutum to Fe limitation

PROVIDER: PRJNA101889 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR486145.fastq.gz	Fastqsanger.gz
	SRR486147.fastq.gz	Fastqsanger.gz
	SRR486148.fastq.gz	Fastqsanger.gz
	SRR486149.fastq.gz	Fastqsanger.gz
	SRR486150.fastq.gz	Fastqsanger.gz

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Similar Datasets

Transcriptional response of the marine pennate diatom Phaeodactylum tricornutum to Fe limitation

Project description:Diatoms, which are responsible for up to 40% of the 45 to 50 billion metric tons of organic carbon production each year in the sea, are particularly sensitive to Fe stress. Here we describe the transcriptional response of the pennate diatom Phaeodactylum tricornutum to Fe limitation using a partial genome microarray based on EST and genome sequence data. Processes carried out by components rich in Fe, such as photosynthesis, mitochondrial electron transport and nitrate assimilation are down-regulated to cope with the reduced cellular iron quota. This retrenchment is compensated by nitrogen (N) and carbon (C) reallocation from protein and storage carbohydrate degradation, adaptations to chlorophyll biosynthesis and pigment metabolism, removal of excess electron s by mitochondrial alternative oxidase (AOX), augmented Fe-independent oxidative stress responses, and sensitized iron capture mechanisms. Keywords: Marine phytoplankton, pinnate diatom Wild-type Phaeodactylum tricornutum was grown under Fe replete (10,000 nM) and Fe limiting (5nM) conditions. Partial genome gene expression analysis of iron-inducible genes was conducted using a two-color competitive hybridization microarray.

2010-05-27 | E-GEOD-8675 | biostudies-arrayexpress

Transcriptional response of the marine pennate diatom Phaeodactylum tricornutum to Fe limitation

2008-01-01 | GSE8675 | GEO

Investigating mixotrophic metabolism in the model diatom Phaeodactylum tricornutum.

Project description:Diatoms are prominent marine microalgae, interesting not only from an ecological point of view, but also for their possible use for biotechnology applications. They can be cultivated in phototrophic conditions, using sunlight as the only energy source. Some diatoms, however, can also grow in mixotrophic mode, where both light and external reduced carbon contribute to biomass accumulation. In this study, we investigated the consequences of mixotrophy on the growth and metabolism of the pennate diatom Phaeodactylum tricornutum, using glycerol as a source of reduced carbon. Transcriptomic, metabolomic and physiological data indicate that glycerol affects the central-carbon, carbon-storage and lipid metabolism of the diatom. In particular, glycerol addition mimics some typical responses of nitrogen limitation on lipid metabolism at the level of TAG accumulation and fatty acid composition. However, this compound does not diminish photosynthetic activity and cell growth, at variance with nutrient limitation, revealing essential aspects of the metabolic flexibility of these microalgae and suggesting possible biotechnological applications of mixotrophy.

2017-03-31 | GSE91004 | GEO

Early nutrient starvation response of the diatom Phaeodactylum tricornutum

Project description:An experiment was performed to determine the similarities on the RNA level between different conditions where cell division stops in the diatom Phaeodactylum tricornutum. Many of these conditions also increase the accumulation of lipids within the cell or impair photosynthesis. The different metabolic responses were evaluated and the dataset was mined for potential transcriptional regulators of these changes. The experimental setup was as follows: Cells from the pennate diatom Phaeodactylum tricornutum were grown in ESAW medium under continous fluorescent light at 21C in baffled shakeflasks. Exponentially growing cells were harvested by centrifugation and washed twice in 21gr/L NaCL to remove nutrients. Cells were subsequently resuspended in the five different media/conditions (control, darkness, no nitrate, no phosphate, nocodazole).

2015-12-07 | E-MTAB-4096 | biostudies-arrayexpress

Regulatory mechanism of diurnal fluctuated laminarin in diatom Phaeodactylum tricornutum

Project description:Diatoms played an essential role in marine primary productivity. Polysaccharide chrysolaminarin and neutral lipid, mainly TAG, were necessary carbon fixation in diatom Phaeodactylum tricornutum. Our study speculated on the metabolism pathway of chrysolaminarin, fatty acid, fatty acid β-oxidation and TAG. Transcriptional levels coordinated with carbon fixation metabolism pathway were conjoint analysis in this study.

2022-08-03 | GSE210141 | GEO

Analysis of the α-1,3 fucosyltransferase gene funtion in diatom Phaeodactylum tricornutum

Project description:Anylasis of the α-1,3 fucosyltransferase gene function in diatom Phaeodactylum tricornutum

2022-10-03 | GSE214570 | GEO

Anylasis of the diatom Phaeodactylum tricornutum under 64-75-5,Tetracycline hydrochloride stress

Project description:Anylasis of the diatom Phaeodactylum tricornutum under 64-75-5,Tetracycline hydrochloride stress

2023-11-10 | GSE218473 | GEO

Identification and Characterization of MicroRNAs from Phaeodactylum tricornutum by High-throughput Sequencing and Bioinformatics Analysis

Project description:Diatoms, which are important planktons widespread in various aquatic environments, are believed to play a vital role in primary production as well as silica cycling. The genomes of the pennate diatom Phaeodactylum tricornutum and the centric diatom Thalassiosira pseudonana have been sequenced, revealing some characteristics of the diatomsâ mosaic genome as well as some features of their fatty acid metabolism and urea cycle, and indicating their unusual properties. To identify microRNAs (miRNAs) from P. tricornutum and to study their probable roles in nitrogen and silicon metabolism, we constructed and sequenced small RNA (sRNA) libraries from P. tricornutum under normal (PT1), nitrogen-limited (PT2) and silicon-limited (PT3) conditions. A total of 13 miRNAs were identified. They were probable P. tricornutum-specific novel miRNAs. These miRNAs were differentially expressed in PT1, PT2 and PT3, and their potential targets were involved in various processes. Our results indicated that P. tricornutum contained novel miRNAs that differed from miRNAs of other organisms and that they might play important regulator roles in P. tricornutum metabolism.

2011-08-08 | GSE29321 | GEO

Phaeodactylum tricornutum

Project description:Histone modifications in the marine diatom Phaeodactylum tricornutum

| PRJNA282957 | ENA

Identification and Characterization of MicroRNAs from Phaeodactylum tricornutum by High-throughput Sequencing and Bioinformatics Analysis

2011-08-08 | E-GEOD-29321 | biostudies-arrayexpress