Coral metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA299413 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR3117470.fastq.gz | Fastqsanger.gz | |||
| SRR3119700.fastq.gz | Fastqsanger.gz | |||
| SRR3117471.fastq.gz | Fastqsanger.gz | |||
| SRR3119701.fastq.gz | Fastqsanger.gz | |||
| SRR3119841.fastq.gz | Fastqsanger.gz |
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Project description:Coral reefs are based on the symbiotic relationship between corals and photosynthetic dinoflagellates of the genus Symbiodinium. We followed gene expression of coral larvae of Acropora palmata and Montastraea faveolata after exposure to Symbiodinium strains that differed in their ability to establish symbioses. We show that the coral host transcriptome remains almost unchanged during infection by competent symbionts, but is massively altered by symbionts that fail to establish symbioses. Our data suggest that successful coral-algal symbioses depend mainly on the symbionts' ability to enter the host in a stealth manner rather than a more active response from the coral host. Acropora palmata Samples: Three biological replicates of pooled larvae from each species and condition (i.e. untreated control, inoculated with competent Symbiodinium strain, inoculated with incompetent Symbiodinium strain) for both time points were hybridized against a pooled reference. Pooled references were constructed by combining equal amounts of aRNA from all control samples from A. palmata. References were labeled with Cy3, samples with Cy5. Montastraea faveolata Samples: Three biological replicates of pooled larvae from each species and condition (i.e. untreated control, inoculated with competent Symbiodinium strain, inoculated with incompetent Symbiodinium strain) for both time points were hybridized against a pooled reference. Pooled references were constructed by combining equal amounts of aRNA from all control samples from M. faveolata. References were labeled with Cy3, samples with Cy5. Symbiodinium sp. CassKB8: competent strain Symbiodinium sp. EL1: incompetent strain Symbiodinium sp. Mf1.05b: competent strain
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Project description:Coral reefs are based on the symbiotic relationship between corals and photosynthetic dinoflagellates of the genus Symbiodinium. We followed gene expression of coral larvae of Acropora palmata and Montastraea faveolata after exposure to Symbiodinium strains that differed in their ability to establish symbioses. We show that the coral host transcriptome remains almost unchanged during infection by competent symbionts, but is massively altered by symbionts that fail to establish symbioses. Our data suggest that successful coral-algal symbioses depend mainly on the symbionts' ability to enter the host in a stealth manner rather than a more active response from the coral host.
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Project description:Projected elevation of seawater temperatures poses a threat to the reproductive success of Caribbean reef-building corals that have planktonic development during the warmest months of the year. This study examined the transcriptomic changes that occurred during embryonic and larval development of the elkhorn coral, Acropora palmata, at a non-stressful temperature (28°C) and further assessed the effects of two elevated temperatures (30°C and 31.5°C) on these expression patterns. Using cDNA microarrays, we compared expression levels of 2,051 genes from early embryos and larvae at multiple developmental stages (including pre-blastula, blastula, gastrula, and planula stages) at each of the three temperatures. At 12 hours post-fertilization in 28°C treatments, genes involved in cell replication/cell division and transcription were up-regulated in A. palmata embryos, followed by a reduction in expression of these genes during later growth stages. From 24.5 to 131 hours post-fertilization at 28°C, A. palmata altered its transcriptome by up-regulating genes involved in protein synthesis and metabolism. Temperatures of 30°C and 31.5°C caused major changes to the A. palmata embryonic transcriptomes, particularly in the samples from 24.5 hpf post-fertilization, characterized by down-regulation of numerous genes involved in cell replication/cell division, metabolism, cytoskeleton, and transcription, while heat shock genes were up-regulated compared to 28°C treatments. These results suggest that increased temperature may cause a breakdown in proper gene expression during development in A. palmata by down-regulation of genes involved in essential cellular processes, which may lead to the abnormal development and reduced survivorship documented in other studies.
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