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Flavobacterial exudates disrupt cell cycle progression and metabolism of the diatom Thalassiosira pseudonana

ABSTRACT: Flavobacterial exudates disrupt cell cycle progression and metabolism of the diatom Thalassiosira pseudonana

PROVIDER: PRJNA812899 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18222200_1.fastq.gz	Fastqsanger.gz
	SRR18222200_2.fastq.gz	Fastqsanger.gz
	SRR18222201_1.fastq.gz	Fastqsanger.gz
	SRR18222201_2.fastq.gz	Fastqsanger.gz
	SRR18222202_1.fastq.gz	Fastqsanger.gz

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Flavobacterial exudates disrupt cell cycle progression and metabolism of the diatom Thalassiosira pseudonana

Project description:Phytoplankton and bacteria form the base of marine ecosystems and their interactions drive global biogeochemical cycles. The effect of bacteria and bacteria-produced compounds on diatoms range from synergistic to pathogenic and can affect the physiology and transcriptional patterns of the interacting diatom. Here, we investigate physiological and transcriptional changes in the marine diatom Thalassiosira pseudonana induced by extracellular metabolites of a known antagonistic bacterium Croceibacter atlanticus. Mono-cultures of C. atlanticus released compounds that inhibited diatom cell division and elicited a distinctive phenotype of enlarged cells with multiple plastids and nuclei, similar to what was observed when the diatom was co-cultured with the live bacteria. The extracellular C. atlanticus metabolites induced transcriptional changes in diatom pathways that include recognition and signaling pathways, cell cycle regulation, carbohydrate and amino acid production, as well as cell wall stability. Phenotypic analysis showed a disruption in the diatom cell cycle progression and an increase in both intra- and extracellular carbohydrates in diatom cultures after bacterial exudate treatment. The transcriptional changes and corresponding phenotypes suggest that extracellular bacterial metabolites, produced independently of direct bacterial-diatom interaction, may modulate diatom metabolism in ways that support bacterial growth.

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