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ABSTRACT: Transcriptomes of decay tests (Rhodonia planta, FPRL280 and MAD-698 and Gloeophyllum trabeum), untreated and acetylated

PROVIDER: PRJNA681134 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13171819.fastq.gz	Fastqsanger.gz
	SRR13171820.fastq.gz	Fastqsanger.gz
	SRR13171821.fastq.gz	Fastqsanger.gz
	SRR13171822.fastq.gz	Fastqsanger.gz
	SRR13171823.fastq.gz	Fastqsanger.gz

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Rhodonia placenta, Gloeophyllum trabeum strain:FPRL280, MAD-698, BAM 115

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Functional transcriptomics reveal distinct combat strategies between lineages of wood-degrading fungi with redundant wood decay mechanisms

Project description:Wood-degrading fungi vary in their strategies for deconstructing wood, and their competitive successes shape the rate and fate of carbon released from wood, Earth’s largest pool of aboveground terrestrial carbon. In this study, one-on-one interspecific interactions between two model brown rot (carbohydrate-selective) fungi, Gloeophyllum trabeum and Rhodonia (Postia) placenta, were studied on wood wafers where a clearly resolved interaction zone (IZ) could be generated, reproducibly. Comparative RNAseq and proteomics between the IZ and non-interacting hyphae of each species identified combative strategies for each fungus. Glycoside hydrolases were a relatively smaller portion of the interaction secretome compared to non-interacting hyphae. The interaction zone showed higher pectinase specific activity than all other sampling locations, and higher laminarinase specific activity (branched β‐glucan proxy) was seen in the IZ secretome relative to equivalent hyphae in single‐species cultures. Our efforts also identified two distinct competitive strategies in these two fungi with a shared nutritional mode (brown rot) but polyphyletic ancestral lineages. Gloeophyllum trabeum (Gloeophyllum clade) employed secondary metabolite (SM) synthesis in response to a competitor, as shown by the upregulation of several SM-synthesizing genes in the interaction. R. placenta (Antrodia clade) instead upregulated a larger variety of uncharacterized oxidoreductases in interacting hyphae, suggesting that an oxidative burst may be a response to competitors in this fungus. Both species produced several hypothetical proteins exclusively in the interaction zone, leaving abundant unknowns on the battlefield. This work supports the existence of multiple interaction strategies among brown rot fungi and highlights the functional diversity among wood decay fungi.

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