Ontology highlight
ABSTRACT:
PROVIDER: PRJNA230459 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1042382.fastq.gz | Fastqsanger.gz |
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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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Project description:We report the transcriptomic comparisions between ku70 control and ste12 mutant strains in nematode-trapping fungus Arthrobotrys oligospora when induced with nematodes. Fungal Ste12 transcription factor and the upstream MAPK cascade are highly conserved and plays a role in host sensing and pathogenesis in various fungal pathogens. Identification of Ste12-dependent in A. oligospora may provide further insights into the molecular mechanisms of nematode-sensing and trap morphogenesis. The reference assemly used for remapping is A. oligospora TWF154 (GenBank assembly accession: GCA_004768765.1)
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Project description:We have infected the model legume Medicago truncatula with Meloidogyne hapla and harvested tissue over a time course. Transcriptome sequencing was performed on each sample using the Illumina RNA-Seq method. [Longitudinal Experiment] RNA was isolated from M. hapla eggs and pre-penetration juveniles (J2) and also from a time course of M. truncatula infected with M. hapla J2 at five time points: 1, 2, 4, 5, and 7 days after inoculation (DAI). Roots (local) and shoots (global) tissues from infected and uninfected plants were sampled. Each sample was loaded on five lanes for sequencing. Collectively, 22 samples were generated in total from - M. hapla egg and J2 (two samples), - infected M. truncatula root 1-2-4-5-7 DAI (five samples), - infected M. truncatula shoot 1-2-4-5-7 DAI (five samples), - uninfected M. truncatula root 1-2-4-5-7 DAI (five samples), - and uninfected M. truncatula shoot 1-2-4-5-7 DAI (five samples). Thus, 110 fastq files (= 22 samples x 5 lanes). [Diunrnal Experiment] M. truncatula roots inoculated with M. hapla was sampled at 6 time-points: 22:30, 2:00, 5:00, 6:30, 14:00, and 21:00. Lighting was turned off at 22:00 and turned on at 06:00. Four biological replicates were taken for each time point, providing 24 samples in total. Thus, 24 fastq files (= 6 time points x 4 replicates).
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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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