title: Antibegomoviral activity of the agrobacterial virulence protein VirE2.
abstract: Mungbean yellow mosaic geminivirus (MYMV) causes severe yellow mosaic disease in blackgram, mungbean, Frenchbean, pigeonpea, soybean and mothbean. We attempted to induce resistance against this virus using the transcriptional activator protein gene deleted in the C-terminal activation domain (TrAP-∆AD) and Agrobacterium tumefaciens virE2. MYMV is known to replicate in agroinoculated tobacco leaf discs. Three transgenic tobacco plants which harboured a truncated MYMV transcriptional activator protein gene and two tobacco plants transformed with the octopine type A. tumefaciens virE2 gene were agroinoculated with an A. tumefaciens strain which harboured the partial dimers of both DNA A and DNA B of MYMV. The level of viral DNA accumulation in leaf discs of transgenic plants correlated inversely to the level of the MYMV TrAP-∆AD transcript. Two VirE2-transgenic plants, which complemented tumorigenesis of a virE2 mutant A. tumefaciens strain, effectively reduced MYMV DNA accumulation in the leaf disc agroinoculation assay.
authors.affiliation: Department of Plant Biotechnology, Madurai Kamaraj University, Madurai, India.
authors.forename: Sukumaran
authors.initials: S
authors.lastname: Sunitha
authors.forename: Dolly
authors.initials: D
authors.lastname: Marian
authors.forename: Barbara
authors.initials: B
authors.lastname: Hohn
authors.forename: Karuppannan
authors.initials: K
authors.lastname: Veluthambi
mesh_terms: D016960:Agrobacterium tumefaciens / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D053839:Begomovirus / Q000235:genetics / Q000472:pathogenicity / Q000502:physiology*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D015967:Gene Expression Regulation, Viral; D007473:Ion Channels / Q000235:genetics / Q000378:metabolism*; D010935:Plant Diseases / Q000235:genetics / Q000276:immunology / Q000517:prevention & control* / Q000821:virology*; D030821:Plants, Genetically Modified / Q000235:genetics / Q000276:immunology / Q000821:virology; D014026:Nicotiana / Q000235:genetics / Q000276:immunology / Q000821:virology*; D014170:Transformation, Genetic; D014774:Virulence; D014779:Virus Replication
chemical_list: D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D007473:Ion Channels; C051583:virE2 protein, Agrobacterium