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Mechanisms of Immune Receptor Diversification in Cereals

Objective

The plant immune system is innate – it is encoded in the germline. In natural pathosystems, plants efficiently deploy hundreds of immune receptors to detect and disarm rapidly evolving pathogens including viruses, bacteria, nematodes, insects, fungi and oomycetes. Exactly how such receptor diversity can evolve is an elusive question with important practical ramifications. A central class of plant immune receptors, called Nucleotide Binding Leucine Rich Repeats proteins (NLR), has been implicated in recognition of vastly diverse pathogen-derived effector molecules. An emerging paradigm of receptor diversification in plant genomes involves new gene fusions of receptors with host proteins that are normally targeted by pathogen effectors. Such fusion receptors ‘bait’ pathogens and their integrated domains are thought to function as ‘decoys’ or ‘sensors’ that mediate pathogen recognition. I have recently demonstrated that the mechanism of generating new receptors through gene fusions originated at least 500 million years ago in mosses and is common to all flowering plants. Here, I propose to decode the mechanisms of plant immune receptor diversification by gene fusions by studying diversity and functions of immune receptors in grasses, a young highly diversified plant family that includes the three most important crops: maize, rice and wheat. My specific aims are to:

1) Determine rates of receptor diversification within and across genomes
2) Dissect the mechanisms of receptor regulation and receptor activation
3) Generate novel plant immune receptors based on the NLR platform prone to fusions.

In this MIREDI research programme, I will combine state of the art sequencing techniques and bioinformatics, molecular biology and novel reverse genetics techniques to study how plant immune system co-evolves with pathogens and what limits diversification of immunity in domesticated crops.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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ERC-STG - Starting Grant

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Call for proposal

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(opens in new window) ERC-2016-STG

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Host institution

EARLHAM INSTITUTE
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 882 899,00
Address
NORWICH RESEARCH PARK COLNEY LANE
NR4 7UZ NORWICH
United Kingdom

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Region
East of England East Anglia Breckland and South Norfolk
Activity type
Research Organisations
Links
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 882 899,00

Beneficiaries (2)

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