Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 555804
Title The Synchytrium endobioticum AvrSen1 triggers a Hypersensitive Response in Sen1 potatoes while natural variants evade detection
Author(s) Vossenberg, Bart van de; Prodhomme, Charlotte; Arkel, G. van; Gent-Pelzer, M.P.E. van; Bergervoet-van Deelen, J.E.M.; Brankovics, Balázs; Przetakiewicz, J.; Visser, R.G.F.; Lee, T.A.J. van der; Vossen, J.H.
Source Molecular Plant-Microbe Interactions 32 (2019)11. - ISSN 0894-0282 - p. 1536 - 1546.
Department(s) Biointeractions and Plant Health
Plant Breeding
Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) avirulence factors - cell death - chytridiomycota - effector - fungus-plant interactions - Genomics - hypersensitive response - metabolomics - plant-pathogen interactions - population genetics - proteomics - resistance genes
Abstract Synchytrium endobioticum is an obligate biotrophic fungus of the phylum Chytridiomycota. It causes potato wart disease, has a world-wide quarantine status and is included on the HHS and USDA Select Agent list. S. endobioticum isolates are grouped in pathotypes based on their ability to evade host-resistance in a set of differential potato varieties. So far, thirty-nine pathotypes are reported. A single dominant gene (Sen1) governs pathotype 1 resistance and we anticipated that the underlying molecular model would involve a pathogen effector (AvrSen1) that is recognized by the host. The S. endobioticum specific secretome of fourteen isolates representing six different pathotypes was screened for effectors specifically present in pathotype 1(D1) isolates but absent in others. We identified a single AvrSen1 candidate. Expression of this candidate in potato Sen1 plants showed a specific hypersensitive response, which co-segregated with the Sen1 resistance in potato populations. No HR was obtained with truncated genes found in pathotypes that evaded recognition by Sen1. These findings established that our candidate gene was indeed Avrsen1. The S. endobioticum AvrSen1 is a single copy gene and encodes a 376 amino acid protein without predicted function or functional domains, and is the first effector gene identified in Chytridiomycota, an extremely diverse yet underrepresented basal lineage of fungi.
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