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Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora TWF154 upon nematode exposure

ABSTRACT: Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora TWF154 upon nematode exposure

PROVIDER: PRJNA976672 | ENA |

REPOSITORIES: ENA

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Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora TWF154 upon nematode exposure

Project description:We report the transcriptomic comparisions between key processes required for various stages of fungal carnivory in nematode-trapping fungus Arthrobotrys oligospora when induced with nematodes. The reference assembly used for remapping is A. oligospora TWF154 (GenBank assembly accession: GCA_004768765.1)

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Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora ku70 and ste12 strains upon nematode exposure

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Transcriptomic analysis reveals that Rho GTPases regulate trap development and lifestyle transition of the nematode-trapping fungus Arthrobotrys oligospora

Project description:Nematode-trapping (NT) fungi can form unique infection structures (traps) to capture and kill free-living nematodes, thus play a potential role in the biocontrol of nematodes. Arthrobotrys oligospora is a representative species of the NT fungi. Here we performed dual RNA-seq to understand the interaction between A. oligospora and Caenorhabditis elegans. We identified 5752 unique differentially expressed genes during trap formation and predation, and the rac gene was significantly upregulated. Alternative splicing events occurred in 896 2012 genes, including the rac and rho2 gene. Further, we characterized three Rho GTPases (Rho2, Rac, and Cdc42) in A. oligospora using gene disruption and multi-phenotypic analysis. The analyses showed that AoRac and AoCdc42 play an important role in mycelium growth, lipid accumulation, DNA damage, sporulation, trap formation, pathogenicity, and stress response in A. oligospora. Furthermore, AoCdc42 and AoRac specifically interacted with components of the Nox complex, thus regulating the production of reactive oxygen species. Furthermore, the transcript levels of several genes associated with the protein kinase A, mitogen-activated protein kinase, and p21-activated kinase were also altered in the mutants, suggesting that Rho GTPases might function upstream of these kinases. This study highlights the important role of Rho GTPases in A. oligospora and provides insights into the regulatory mechanism of signaling pathways in trap morphogenesis and lifestyle transition of NT fungi.

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Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora ku70 and ste12 strains upon nematode exposure

Project description:Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora ku70 and ste12 strains upon nematode exposure

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Aoatg11 and Aoatg33 are indispensable for mitophagy, and contribute to conidiation, the stress response, and pathogenicity in the nematode-trapping fungus Arthrobotrys oligospora

Project description:Mitophagy is one of the most important cellular processes to ensure mitochondrial quality control, which aims to transport damaged, dysfunctional, or excess mitochondria for degradation and reuse. Here, we determined the function of AoAtg11 and AoAtg33, two orthologous autophagy-related proteins involved in yeast mitophagy, in the typical nematode-trapping fungus Arthrobotrys oligospora . Deletion of Aoatg11 and Aoatg33 impairs mitophagy, mitochondrial morphology and activity, autophagy,cell apoptosis, reactive oxygen species levels, lipid droplet accumulation, and endocytosis. These combined effects resulted in slow vegetative growth; reduced conidiation, trap formation, cell nucleus, and extracellular protease activity; increased susceptibility to the stress response; and arthrobotrisin production in the Δ Aoatg11 and Δ Aoatg33 mutants, compared with the wild-type strain. In addition, the absence of Aoatg11 caused an endoplasmic reticulum stress response. Transcriptome analysis revealed that many differentially expressed genes in the Δ Aoatg11 mutants were involved in various important cellular processes, such as lipid metabolism, the TCA cycle, mitophagy, nitrogen metabolism, endocytosis, and the MAPK signaling pathway. In conclusion, our study revealed that Aoatg11 and Aoatg33 mediate autophagy and mitophagy in A. oligospora , and provides a basis for elucidating the links between mitophagy and fungal vegetative growth, conidiation, and pathogenicity.

2022-09-09 | GSE212735 | GEO

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