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ABSTRACT: Microbiomes of gall-inducing copepod crustaceans from the corals Stylophora pistillata (Scleractinia) and Gorgonia ventalina (Alcyonacea)

PROVIDER: PRJNA433804 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6706310.fastq.gz	Fastqsanger.gz
	SRR6706311.fastq.gz	Fastqsanger.gz
	SRR6706302.fastq.gz	Fastqsanger.gz
	SRR6706312.fastq.gz	Fastqsanger.gz
	SRR6706303.fastq.gz	Fastqsanger.gz

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Project description:Background. Coral reef communities are undergoing marked declines due to a variety of stressors including climate change, eutrophication, sedimentation, and disease. The sea fan coral, Gorgonia ventalina, is a tractable study system to investigate the hypothesis that stressors compromise immunity and lead to onset of disease. Functional studies in Gorgonia ventalina immunity indicate that several key pathways and cellular responses are involved in response to natural microbial invaders, although to date the functional and regulatory pathways remain largely un-neffectors, the primary line of defense in invertebrates. This study used short-read sequencing (Illumina GAIIx) to identify genes involved in the response of G. ventalina to a naturally occurring Aplanochytrium spp. parasite. Results. De novo assembly of the G. ventalina transcriptome yielded 90,230 contigs of which 40, 142 were annotated. RNA-Seq analysis revealed 210 differentially expressed genes in sea fans exposed to the Aplanochytrium parasite. Differentially expressed genes involved in immunity include pattern recognition molecules, anti-microbial peptides, wound repair, and reactive oxygen species. Gene enrichment analysis indicated eight biological processes were enriched representing 36 genes, largely involved with protein translation and energy production. Conclusions. This is the first report using high-throughput sequencing to characterize the host response of a coral to a natural pathogen. Furthermore, we have generated the first transcriptome for a soft coral species. G. ventalina is a non-model species for which few sequences had been previously described, and we were able to annotate a large number of genes and describe their potential roles in immune function. Expression analysis revealed genes important in invertebrate innate immune pathways, as well as those whose role is previously un-described in cnidarians. This resource will be valuable in characterizing G. ventalina immune response to infection and co-infection of pathogens in the context of environmental change.

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