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The Role of Vitamin D in Emiliania huxleyi: A Microalgal Perspective on UV-B Exposure

ABSTRACT: The Role of Vitamin D in Emiliania huxleyi: A Microalgal Perspective on UV-B Exposure

PROVIDER: PRJNA1019371 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26126073.fastq.gz	Fastqsanger.gz
	SRR26126074.fastq.gz	Fastqsanger.gz
	SRR26126075.fastq.gz	Fastqsanger.gz
	SRR26126076.fastq.gz	Fastqsanger.gz
	SRR26126077.fastq.gz	Fastqsanger.gz

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The Role of Vitamin D in Emiliania huxleyi: A Microalgal Perspective on UV-B Exposure

Project description:An essential interaction between sunlight and eukaryotes involves the production of vitamin D through exposure to ultraviolet (UV) radiation. While extensively studied in vertebrates, the role of vitamin D in non-animal eukaryotes like microalgae remains unclear. To investigate the potential involvement of vitamin D in the response of microalgae to UV, we focus on Emiliania huxleyi, a microalga found in shallow ocean depths that are exposed to UV radiation. Our results show that E. huxleyi algae produce vitamin D2 and D3 in response to UV irradiation. We further demonstrate that E. huxleyi algae respond to external administration of vitamin D at the transcriptional level, regulating the expression of protective mechanisms that are also regulated in response to UV. Our data reveal that addition of vitamin D enhances the algal photosynthetic performance while reducing harmful reactive oxygen species buildup. This study contributes to understanding the function of vitamin D in E. huxleyi and sheds light on its role in non-animal eukaryotes, as well as its potential importance in marine ecosystems.

2023-09-25 | GSE243677 | GEO

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Emiliania huxleyi BOF92 and Emiliania huxleyi virus99B1

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Emiliania huxleyi and Emiliania huxleyi virus

Project description:Emiliania huxleyi and Emiliania huxleyi virus Transcriptome or Gene expression

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Emiliania huxleyi and Emiliania huxleyi virus

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LongSAGE transcriptome profiling in the widespread marine coccolithophore Emiliania huxleyi

Project description:The abundant and widespread coccolithophore Emiliania huxleyi plays an important role in mediating CO2 exchange between the ocean and the atmosphere through its impact on marine photosynthesis and calcification. Here, we use long serial analysis of gene expression (SAGE) to identify E. huxleyi genes responsive to nitrogen (N) or phosphorus (P) starvation. Long SAGE is an elegant approach for examining quantitative and comprehensive gene expression patterns without a priori knowledge of gene sequences via the detection of 21-bp nucleotide sequence tags. E. huxleyi appears to have a robust transcriptional-level response to macronutrient deficiency, with 42 tags uniquely present or up-regulated twofold or greater in the N-starved library and 128 tags uniquely present or up-regulated twofold or greater in the P-starved library. The expression patterns of several tags were validated with reverse transcriptase PCR. Roughly 48% of these differentially expressed tags could be mapped to publicly available genomic or expressed sequence tag (EST) sequence data. For example, in the P-starved library a number of the tags mapped to genes with a role in P scavenging, including a putative phosphate-repressible permease and a putative polyphosphate synthetase. In short, the long SAGE analyses have (i) identified many new differentially regulated gene sequences, (ii) assigned regulation data to EST sequences with no database homology and unknown function, and (iii) highlighted previously uncharacterized aspects of E. huxleyi N and P physiology. To this end, our long SAGE libraries provide a new public resource for gene discovery and transcriptional analysis in this biogeochemically important marine organism. Keywords: Emiliania, gene expression, nutrients, SAGE, phosphate, nitrogen

2007-07-07 | GSE8376 | GEO

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