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Uncultured prokaryote

ABSTRACT: Arid and hyperarid rock crust, soil crust and dust microboime

PROVIDER: PRJNA381483 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5431190_1.fastq.gz	Fastqsanger.gz
	SRR5431190_2.fastq.gz	Fastqsanger.gz
	SRR5431200_1.fastq.gz	Fastqsanger.gz
	SRR5431200_2.fastq.gz	Fastqsanger.gz
	SRR5431210_1.fastq.gz	Fastqsanger.gz

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Project description:Biological soil crusts (BSCs) are cyanobacteria-dominated microbial communities that cover extensive portions of the world’s arid and semi-arid deserts. The infrequent periods of hydration are often too short to allow for dormancy strategies based on sporulation; consequently, survival is based on the unique capabilities of vegetative cells to resuscitate from and re-enter a stress resistant dormant state, one of which is migration within the crust layers in response to hydration. In this study, we sought to characterize the events that govern the emergence of the dominant cyanobacterium from dormancy, its subsequent growth, and the events triggered by re-desiccation and a transition back to dormant state. We performed a 48 hour laboratory wetting experiment of a desert BSC and tracked the response of Microcoleus vaginatus using a whole genome transcriptional time-course including night/day periods. This allowed the identification of genes with a diel expression pattern, genes involved uniquely in the signaling after hydration and those that contribute primarily to desiccation preparation. Desert BSC samples collected from Moab, UT, were hydrated over a period of 48 hours followed by drying induced by removal of water. At periodic times soil samples were harvested and used for RNA extraction and whole genome expression analysis using an expression array representing genes from two strains of M. vaginatus (PCC 9802 and FGP-2)

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