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Hierarchical transcriptional network controls appressorium-mediated plant infection by the rice blast fungus Magnaporthe oryzae

ABSTRACT: Hierarchical transcriptional network controls appressorium-mediated plant infection by the rice blast fungus Magnaporthe oryzae

PROVIDER: PRJNA756683 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15559054.fastq.gz	Fastqsanger.gz
	SRR15559055.fastq.gz	Fastqsanger.gz
	SRR15559056.fastq.gz	Fastqsanger.gz
	SRR15559057.fastq.gz	Fastqsanger.gz
	SRR15559058.fastq.gz	Fastqsanger.gz

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Hierarchical transcriptional network controls appressorium-mediated plant infection by the rice blast fungus Magnaporthe oryzae

Project description:We report that the homeobox trasncription factor called HOX7 controls hyphae-associated genes, autophagy and cell cycle related genes necessary for appressorium development in the rice blast fungus Magnaporthe oryzae. We also report that the ste transcription factor MST12 regulates gene functions involved in septin reorientation.

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A hierarchical transcriptional network controls appressorium-1 mediated plant 2 infection by the rice blast fungus Magnaporthe oryzae

Project description:Rice blast is a pervasive and devastating disease that threatens rice production across the world. In spite of its importance to global food security, however, the underlying biology of plant infection by the blast fungus Magnaporthe oryzae remains poorly understood. In particular, it is unclear how the fungus elaborates a specialised infection cell, the appressorium, in response to surface signals from the rice leaf. Here, we report the identification of a network of temporally co-regulated transcription factors that act downstream of the Pmk1 mitogen-activated protein kinase pathway to regulate gene expression during appressorium-mediated plant infection. We have functionally characterised this network of transcription factors and demonstrated the operation of a hierarchical transcriptional control system. We show that this tiered regulatory mechanism involves Pmk1-dependent phosphorylation of the Hox7 homeobox transcription factor, which represses hyphal-associated gene expression and simultaneously induces major physiological changes required for appressorium development, including cell cycle arrest, autophagic cell death, turgor generation and melanin biosynthesis. Mst12 then regulates gene functions involved in septin-dependent cytoskeletal re-organisation, polarised exocytosis and effector gene expression necessary for plant tissue invasion.4929

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Analysis of transcript abundance during appressorium formation in the rice blast fungus Magnaporthe oryzae using HT-SuperSAGE.

Project description:The rice-blast fungus Magnaporthe oryzae is disseminated using a three-celled spore or conidium. Upon landing on the surface of a rice leaf, the conidium germinates and forms a specialised structure for entry into the host plant - the appressorium. In this study we have followed gene expression thoughout germination of the conidium and formation of the appressorium to identify genes that may be important for appressorium function. We have also compared gene expression in the wild-type germinating conidium at four hours to a mutant strain deleted for the MAP kinase pmk1. The pmk1 mutant is unable to form appressoria.

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Analysis of transcript abundance during appressorium formation in the rice blast fungus Magnaporthe oryzae using HT-SuperSAGE.

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Comparison of transcript abundance in mycelium from the rice blast fungus Magnaporthe oryzae grown in rich medium and in minimal medium using RNA-Seq

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Project description:Genetic studies have shown essential functions of N-glycosylation during infection of the plant pathogenic fungi, however, systematic roles of N-glycosylation in fungi is still largely unknown. Biological analysis demonstrated N-glycosylated proteins were widely present at different development stages of Magnaporthe oryzae and especially strong in the appressorium and invasive hypha.A large-scale quantitative proteomics analysis was then performed to explore the roles of N-glycosylation in M. oryzae.

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