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A recombinant hybrid provides insights into gene regulation, pathogenesis and tumorigenesis of phytopathogenic smut fungi

ABSTRACT: A recombinant hybrid provides insights into gene regulation, pathogenesis and tumorigenesis of phytopathogenic smut fungi

PROVIDER: PRJNA1240218 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR32806000_1.fastq.gz	Fastqsanger.gz
	SRR32806000_2.fastq.gz	Fastqsanger.gz
	SRR32806001_1.fastq.gz	Fastqsanger.gz
	SRR32806001_2.fastq.gz	Fastqsanger.gz
	SRR32806002_1.fastq.gz	Fastqsanger.gz

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A recombinant hybrid provides insights into gene regulation, pathogenesis and tumorigenesis of phytopathogenic smut fungi

Project description:The maize smut fungi Ustilago maydis and Sporisorium reilianum are closely related and have similar genomes in terms of size and synteny. While U. maydis induces tumors locally at sites of infection, S. reilianum systemically colonizes the host and causes symptoms in the inflorescences. To investigate the genetic basis of these differences, an interspecific recombinant hybrid (rUSH) with the mating type system of S. reilianum was generated. rUSH exhibited extensive in-planta proliferation, showing a S. reilianum-like phenotype at all developmental stages except teliospore formation. Transcriptome profiling revealed that expression of pathogenicity-related effector gene orthologs was induced in rUSH, but not in a wild-type hybrid control. Multiple transcriptome comparisons identified 253 differentially expressed one-to-one effector orthologs with distinct regulatory patterns, including cis-, trans-, and rUSH-specific regulation. Functional analysis via CRISPR/Cas9 mutagenesis uncovered three novel virulence factors among the rUSH-specific regulated effectors. Ultimately, rUSH facilitated to identify the transcription factor UmHdp2 as key regulator of U. maydis-induced tumorigenesis. Together, these findings highlight the utility of a recombinant, interspecific hybrid in unraveling the molecular mechanisms underlying pathogenic differences in closely related fungal pathogens.

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