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Drying-rewetting and freezing-thawing legacies on soil microbial communities

ABSTRACT: The sequences are from a laboratory experiment, where we tested how a legacy of freezing-thawing and drying-rewetting cycle affect the microbial community and its response to an additional fluctuation.

PROVIDER: PRJEB40946 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR4760660_1.fastq.gz	Fastqsanger.gz
	ERR4760660_2.fastq.gz	Fastqsanger.gz
	ERR4760670_1.fastq.gz	Fastqsanger.gz
	ERR4760670_2.fastq.gz	Fastqsanger.gz
	ERR4760680_1.fastq.gz	Fastqsanger.gz

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Soil microbial legacies differ following drying-rewetting and freezing-thawing cycles.

Project description:Climate change alters frequencies and intensities of soil drying-rewetting and freezing-thawing cycles. These fluctuations affect soil water availability, a crucial driver of soil microbial activity. While these fluctuations are leaving imprints on soil microbiome structures, the question remains if the legacy of one type of weather fluctuation (e.g., drying-rewetting) affects the community response to the other (e.g., freezing-thawing). As both phenomenons give similar water availability fluctuations, we hypothesized that freezing-thawing and drying-rewetting cycles have similar effects on the soil microbiome. We tested this hypothesis by establishing targeted microcosm experiments. We created a legacy by exposing soil samples to a freezing-thawing or drying-rewetting cycle (phase 1), followed by an additional drying-rewetting or freezing-thawing cycle (phase 2). We measured soil respiration and analyzed soil microbiome structures. Across experiments, larger CO2 pulses and changes in microbiome structures were observed after rewetting than thawing. Drying-rewetting legacy affected the microbiome and CO2 emissions upon the following freezing-thawing cycle. Conversely, freezing-thawing legacy did not affect the microbial response to the drying-rewetting cycle. Our results suggest that drying-rewetting cycles have stronger effects on soil microbial communities and CO2 production than freezing-thawing cycles and that this pattern is mediated by sustained changes in soil microbiome structures.

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Project description:In this study, we focused on air-drying stress and analyzed the changes in gene expression of commercial baker’s yeast during the air-drying process. Changes in gene expression profiles of commercial baker’s yeast during an air-drying process at 37oC that simulated dried yeast production were analyzed using DNA microarrays. Keywords: Stress response

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Gene Expression During Recovery from Freezing

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2011-07-21 | E-GEOD-24757 | biostudies-arrayexpress

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