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Acropora tenuis

ABSTRACT: Gene expression alterations from reversible to irreversible stages during coral metamorphosis

PROVIDER: PRJDB12283 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR318288_1.fastq.gz	Fastqsanger.gz
	DRR318288_2.fastq.gz	Fastqsanger.gz
	DRR318289_1.fastq.gz	Fastqsanger.gz
	DRR318289_2.fastq.gz	Fastqsanger.gz
	DRR318290_1.fastq.gz	Fastqsanger.gz

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Acropora tenuis

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Molecular response of the coral Acropora millepora to three settlement and/or metamorphosis induced stimuli

Project description:Two known settlement/metamorphosis inducing stimuli (crustose coralline algae, and ethanolic extract of crustose coralline algae) and one stimulus which just induces metamorphosis (LWamide) were used to stimulate competent planula larvae of the coral Acropora millepora. Samples were taken 0.5h, 4h and 12h post induction isolate the genes controlling settlement and metamorphosis in this coral.

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Project description:Comparative analysis of gene expression in coral Acropora tenuis exposed to a UV filter or heat stress

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Gene expression analysis during metamorphosis and the onset of calcification in the scleractinian coral M. faveolata

Project description:Similar to many marine invertebrates, scleractinian corals experience a dramatic morphological transformation, as well as a habitat switch, upon settlement and metamorphosis. At this time, planula larvae transform from non-calcifying, demersal, motile organisms into sessile, calcifying, benthic juvenile polyps. We performed a gene expression microarray analysis between planulae, aposymbiotic primary polyps, and symbiotic adult tissue to elucidate the molecular mechanisms underlying coral metamorphosis and early stages of calcification in the Robust/Short clade scleractinian coral Montastraea faveolata. Among the annotated genes, the most abundant upregulated transcripts in the planula stage are involved in protein synthesis, chromatin assembly and mitochondrial metabolism; the polyp stage, morphogenesis, protein catabolism and organic matrix synthesis; and the adult stage, sexual reproduction, stress response and symbiosis. Additionally, our results indicate that metamorphosis in M. faveolata planulae is likely regulated by: 1) a mechanism that resembles that described for hydrozoan cnidarians involving the neuropeptide LWamide; and 2) conserved cell adhesion and apoptosis mechanisms. Our results also suggest that calicoblast differentiation pathways may be regulated by transforming growth factors from the BMP family and Notch signalling pathway. We also present evidence showing that the planula and adult transcriptomes are more similar to each other than to the polyp trancriptome. Lastly, our results point to a large number of uncharacterized adult coral-specific genes likely involved in coral-specific functions such as symbiosis and calcification.

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Establishing Sustainable Cell Lines of a Coral, Acropora tenuis.

Project description:Planula larvae of the scleractinian coral, Acropora tenuis, consist of elongated ectodermal cells and developing inner endodermal cells. To establish in vitro cell lines for future studies of cellular and developmental potential of coral cells, larvae were successfully dissociated into single cells by treating them with a tissue dissociation solution consisting of trypsin, EDTA, and collagenase. Brown-colored cells, translucent cells, and pale blue cells were the major components of dissociated larvae. Brown-colored cells began to proliferate transiently in the culture medium that was devised for the coral, while translucent cells and pale blue cells decreased in number about 1 week after cell dissociation. In addition, when a modular protease, plasmin, was added to the cell culture medium, brown-colored cells extended pseudopodia and assumed amorphous shapes. They then continued to proliferate in clumps for more than 6 months with a doubling time of approximately 4-5 days. From 3 weeks of cell culture onward, brown-colored cells often aggregated and exhibited morphogenesis-like behavior to form flat sheets, and blastula-like clusters or gastrula-like spheres. Single cells or cell-clusters of the cell lines were analyzed by RNA-seq. This analysis showed that genes expressed in these cells in vitro were A. tenuis genes. Furthermore, each cell line expressed a specific set of genes, suggesting that their properties include gastroderm, secretory cells, undifferentiated cells, neuronal cells, and epidermis. All cell properties were maintained stably throughout successive cell cultures. These results confirm the successful establishment of a coral in vitro cell line.

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Project description:Molecular response of the coral Acropora millepora to three settlement and/or metamorphosis induced stimuli

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Project description:Acropora tenuis overview

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Project description:Acropora tenuis larvae infection experiments

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