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Sporisorium reilianum possesses a pool of effector proteins that modulate virulence on maize. | LitMetric

Sporisorium reilianum possesses a pool of effector proteins that modulate virulence on maize.

Mol Plant Pathol

Department of Molecular Biology of Plant-Microbe Interactions, Albrecht-von-Haller Institute of Plant Sciences, Schwann-Schleiden Research Center for Molecular Cell Biology, Georg-August-Universität Göttingen, Julia-Lermontowa-Weg 3, Göttingen, 37077, Germany.

Published: January 2019

AI Article Synopsis

Article Abstract

The biotrophic maize head smut fungus Sporisorium reilianum is a close relative of the tumour-inducing maize smut fungus Ustilago maydis with a distinct disease aetiology. Maize infection with S. reilianum occurs at the seedling stage, but spores first form in inflorescences after a long endophytic growth phase. To identify S. reilianum-specific virulence effectors, we defined two gene sets by genome comparison with U. maydis and with the barley smut fungus Ustilago hordei. We tested virulence function by individual and cluster deletion analysis of 66 genes and by using a sensitive assay for virulence evaluation that considers both disease incidence (number of plants with a particular symptom) and disease severity (number and strength of symptoms displayed on any individual plant). Multiple deletion strains of S. reilianum lacking genes of either of the two sets (sr10057, sr10059, sr10079, sr10703, sr11815, sr14797 and clusters uni5-1, uni6-1, A1A2, A1, A2) were affected in virulence on the maize cultivar 'Gaspe Flint', but each of the individual gene deletions had only a modest impact on virulence. This indicates that the virulence of S. reilianum is determined by a complex repertoire of different effectors which each contribute incrementally to the aggressiveness of the pathogen.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6430478PMC
http://dx.doi.org/10.1111/mpp.12744DOI Listing

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