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ABSTRACT: Population genomics of Orbicella faveolata in the Florida Keys

PROVIDER: PRJNA508589 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8284230.fastq.gz	Fastqsanger.gz
	SRR8284240.fastq.gz	Fastqsanger.gz
	SRR8284250.fastq.gz	Fastqsanger.gz
	SRR8284260.fastq.gz	Fastqsanger.gz
	SRR8284270.fastq.gz	Fastqsanger.gz

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Understanding differential heat tolerance of the threatened mountainous star coral Orbicella faveolata from inshore and offshore reef sites in the Florida Keys using gene network analysis

Project description:We subjected three inshore and four offshore genotypes of the coral Orbicella faveolata to 30, 31, 32, or 33ºC for 31 days and measured photochemical efficiency (Fv/Fm), the types and relative abundance of dinoflagellate endosymbionts, and gene expression of the host and symbiont. All inshore coral genotypes, regardless of symbiont type, were significantly more thermotolerant than offshore genotypes based on declines in Fv/Fm. The most heat-tolerant inshore genotype (In1) was dominated by Durusdinium trenchii; all other genotypes were Breviolum-dominated, suggesting local adaptation or acclimatization contributes to the heat tolerance of inshore genotypes. After 31 days of heat stress, all coral genotypes (except In2) had lost most of their Breviolum and became dominated by D. trenchii. Host genotype In1 presented unique expression patterns of genes involved in heat shock response, immunity, and protein degradation. There were few changes in the symbiont transcriptomes of inshore corals under heat stress, but significant changes in symbiont gene expression from the offshore colonies, including increases in ribosomal and photosynthetic proteins. These data show that the differential thermotolerance between inshore and offshore O. faveolata in the Florida Keys is associated with statistically significant differences in both host and symbiont gene expression that provide insights into the mechanisms underlying holobiont heat tolerance.

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Project description:Reproduction of queen conchs at nearshore sites in the Florida Keys is known to be impaired (Delgado et al. 2004). A recent microarray study of male queen conchs collected from the Florida Keys during the early part of the reproductive season (February, 2007) indicated that NS conchs show differences in expression of spermatogenesis-related and small GTPase signaling transcripts (Spade et al. 2010). The current study investigates gene expression in the ovary of female queen conchs from the same sampling effort in February, 2007.

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