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Wetzel, Veronika; Willlems, Glenda; Darracq, Aude; Galein, Yann; Liebe, Sebastian; Varrelmann, Mark

The Beta vulgaris‐derived resistance gene Rz2 confers broad‐spectrum resistance against soilborne sugar beet‐infecting viruses from different families by recognizing triple gene block protein 1

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  • Media type: E-Article
  • Title: The Beta vulgaris‐derived resistance gene Rz2 confers broad‐spectrum resistance against soilborne sugar beet‐infecting viruses from different families by recognizing triple gene block protein 1
  • Contributor: Wetzel, Veronika; Willlems, Glenda; Darracq, Aude; Galein, Yann; Liebe, Sebastian; Varrelmann, Mark
  • imprint: Wiley, 2021
  • Published in: Molecular Plant Pathology
  • Language: English
  • DOI: 10.1111/mpp.13066
  • ISSN: 1464-6722; 1364-3703
  • Keywords: Plant Science ; Soil Science ; Agronomy and Crop Science ; Molecular Biology
  • Origination:
  • Footnote:
  • Description: <jats:title>Abstract</jats:title><jats:p>Sugar beet cultivation is dependent on an effective control of beet necrotic yellow vein virus (BNYVV, family <jats:italic>Benyviridae</jats:italic>), which causes tremendous economic losses in sugar production. As the virus is transmitted by a soilborne protist, the use of resistant cultivars is currently the only way to control the disease. The <jats:italic>Rz2</jats:italic> gene product belongs to a family of proteins conferring resistance towards diverse pathogens in plants. These proteins contain coiled‐coil and leucine‐rich repeat domains. After artificial inoculation of homozygous <jats:italic>Rz2</jats:italic> resistant sugar beet lines, BNYVV and beet soilborne mosaic virus (BSBMV, family <jats:italic>Benyviridae</jats:italic>) were not detected. Analysis of the expression of <jats:italic>Rz2</jats:italic> in naturally infected plants indicated constitutive expression in the root system. In a transient assay, coexpression of <jats:italic>Rz2</jats:italic> and the individual BNYVV‐encoded proteins revealed that only the combination of <jats:italic>Rz2</jats:italic> and triple gene block protein 1 (TGB1) resulted in a hypersensitive reaction (HR)‐like response. Furthermore, HR was also triggered by the TGB1 homologues from BSBMV as well as from the more distantly related beet soilborne virus (family <jats:italic>Virgaviridae</jats:italic>). This is the first report of an <jats:italic>R</jats:italic> gene providing resistance across different plant virus families.</jats:p>
  • Access State: Open Access