Ontology highlight
ABSTRACT:
PROVIDER: PRJNA811810 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR18190581_1.fastq.gz | Fastqsanger.gz | |||
| SRR18190581_2.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 3 of 3 |
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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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Project description:The fungal pathogen Candida albicans produces dark-pigmented melanin when grown in a basal medium containing 1 mM l-DOPA as melanin substrate. In the widely used C. albicans strain SC5314, melanin appeared after 3-4 days of incubation in l-DOPA medium. The experiment was designed to reveal cadidate genes associated with melanin biosynthesis by expression profiling at different times of growth with and without L-DOPA added to the medium. Expression profiling of C. albicans revealed very few genes significantly up- or down-regulated by growth in l-DOPA.
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