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Fungal communities colonizing decomposing fungal necromass in wood and soil at Itasca Biological Station & Laboratories

ABSTRACT: Fungal communities colonizing decomposing fungal necromass in wood and soil at Itasca Biological Station & Laboratories Targeted loci environmental

PROVIDER: PRJNA560400 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9987910_1.fastq.gz	Fastqsanger.gz
	SRR9987910_2.fastq.gz	Fastqsanger.gz
	SRR9987920_1.fastq.gz	Fastqsanger.gz
	SRR9987920_2.fastq.gz	Fastqsanger.gz
	SRR9987930_1.fastq.gz	Fastqsanger.gz

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Melanization of fungal necromass drives the upregulation of multiple chitinase, protease, and laccase genes when being degraded by Trichoderma reesei

Project description:Fungal necromass in soil represents the stable carbon pools. While fungi are known to decompose fungal necromass, how fungi decomopose melanin, remains poorly understood. Recently, Trichoderma species was found to be one of the most commonly associated fungi in soil, we have used a relevant fungal species, Trichoderma reesei, to characterized Genes involved in the decomposition of melanized and non-melanized necromass from Hyaloscypha bicolor.

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Transcriptomic analyses of bacterial growth on fungal necromass reveals different microbial community niches during degradation

Project description:Bacteria are major drivers of organic matter decomposition and play crucial roles in global nutrient cycling. Although the degradation of dead fungal biomass (necromass) is increasingly recognized as an important contributor to soil carbon (C) and nitrogen (N) cycling, the genes and metabolic pathways involved in necromass degradation are under characterized. In particular, how bacteria degrade necromass containing different quantities of melanin, which largely control rates of necromass decomposition in situ, is largely unknown. To address this gap, we conducted a multi-timepoint transcriptomic analysis using three Gram-negative, bacterial species grown on low or high melanin necromass of Hyaloscypha bicolor. The bacterial species, Cellvibrio japonicus, Chitinophaga pinensis, and Serratia marcescens, belong to genera known to degrade necromass in situ. We found that while bacterial growth was consistently higher on low than high melanin necromass, the CAZyme-encoding gene expression response of the three species was similar between the two necromass types. Interestingly, this trend was not shared for genes encoding nitrogen utilization, which varied in C. pinensis and S. marcescens during growth on high versus low melanin necromass. Additionally, this study tested the metabolic capabilities of these bacterial species to grow on a diversity of C and N sources and found that the three bacteria have substantially different abilities to utilize carbon and nitrogen compounds. Collectively, our data suggests that as necromass changes chemically over the course of degradation, certain bacterial species are favored based on their differential metabolic capacities.

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Comparative transcriptomic analysis of a wood decomposing fungus in various atmospheres

Project description:AIM: By adopting comparative transcriptomic approach, we investigated the gene expression of wood decomposing Basidiomycota fungus Phlebia radiata. Our aim was to reveal how hypoxia and lignocellulose structure affect primary metabolism and the expression of wood decomposition related genes. RESULTS: Hypoxia was a major regulator for intracellular metabolism and extracellular enzymatic degradation of wood polysaccharides by the fungus. Our results manifest how oxygen depletion affects not only over 200 genes of fungal primary metabolism but also plays central role in regulation of secreted CAZyme (carbohydrate-active enzyme) encoding genes. Based on these findings, we present a hypoxia-response mechanism in wood-decaying fungi divergent from the regulation described for Ascomycota fermenting yeasts and animal-pathogenic species of Basidiomycota.

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Transcriptomic analyses of bacterial growth on fungal necromass reveals different microbial community niches during degradation

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