The Complexity of the Holobiont in the Red Sea Coral Euphyllia paradivisa under Heat Stress

Microorganisms
Dalit MeronOren Levy

Abstract

The recognition of the microbiota complexity and their role in the evolution of their host is leading to the popularization of the holobiont concept. However, the coral holobiont (host and its microbiota) is still enigmatic and unclear. Here, we explore the complex relations between different holobiont members of a mesophotic coral Euphyllia paradivisa. We subjected two lines of the coral-with photosymbionts, and without photosymbionts (apo-symbiotic)-to increasing temperatures and to antibiotics. The different symbiotic states were characterized using transcriptomics, microbiology and physiology techniques. The bacterial community's composition is dominated by bacteroidetes, alphaproteobacteria, and gammaproteobacteria, but is dependent upon the symbiont state, colony, temperature treatment, and antibiotic exposure. Overall, the most important parameter determining the response was whether the coral was a symbiont/apo-symbiotic, while the colony and bacterial composition were secondary factors. Enrichment Gene Ontology analysis of coral host's differentially expressed genes demonstrated the cellular differences between symbiotic and apo-symbiotic samples. Our results demonstrate the significance of each component of the holobi...Continue Reading

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Datasets Mentioned

BETA
SRP133996
PRJNA385711

Methods Mentioned

BETA
PCR
RNA-seq

Software Mentioned

BLASTX
David Bioinformatics Resources
EdgeR
Fastq
CRB
Blast
MOTHUR
Ensembl
PAST
BLASTN

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