Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Chimeras between Oilseed rape mosaic virus and Tobacco mosaic virus highlight the relevant role of the tobamoviral RdRp as a pathogenicity determinant in several hosts.
Year:2009
Research Areas
  • Molecular biology
Information
Abstract
Oilseed rape mosaic virus (ORMV) is a tobamovirus taxonomically distinct from the type member of the genus, Tobacco mosaic virus (TMV). Both viruses display a specific host range, although they share certain hosts, such as Arabidopsis thaliana , Nicotiana benthamiana and N. tabacum , on which they induce different symptoms. Using a gain-of-symptom approach, we generated chimeric viruses, starting from a TMV infectious clone, over which different regions of ORMV were exchanged with their corresponding regions in the TMV genome. This approach allowed the association of pathogenicity determinants to certain genes within the ORMV genome. A general trend was observed associating the viral origin of the RNA-dependent RNA-polymerase ( RdRp ) gene and the gain of symptoms. In A. thaliana and N. benthamiana , chimeric viruses were unable to reproduce the symptoms induced by the parental viruses, leading to disease states which could be described as intermediate, and variable in some cases. In contrast, a hypersensitive reaction caused by both of these viruses on N -gene-bearing tobaccos could be found in resistance reactions to all chimeric viruses, suggesting that the avirulence determinant maps similarly in both viruses. A systemic necrotic spotting typical of non- N -gene tobaccos infected with ORMV was associated with the polymerase domain of RdRp . To our knowledge, this is the first time that this controversial portion of the tobamovirus genome has been identified directly as a pathogenicity determinant. None of the reactions of the chimeric viruses could be correlated with increases or decreases in virus titres in the infections.
International
Si
JCR
Si
Title
MOLECULAR PLANT PATHOLOGY
ISBN
1464-6722
Impact factor JCR
3,084
Impact info
Volume
Journal number
0
From page
59
To page
68
Month
ENERO
Ranking
Participants
  • AUTOR: CARMEN MANSILLA
  • Autor: Flora Sanchez Sanchez (UPM)
  • Autor: Fernando Ponz Ascaso (UPM)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Centro de Biotecnología y Genómica de Plantas, CBGP
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