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Viruses 2015, 7(5), 2641-2653; doi:10.3390/v7052641

The Agrobacterium tumefaciens Ti Plasmid Virulence Gene virE2 Reduces Sri Lankan Cassava Mosaic Virus Infection in Transgenic Nicotiana benthamiana Plants

1
Department of Plant Biotechnology, School of Biotechnology, Madurai Kamaraj University, Madurai, Tamil Nadu 625021, India
2
Institute of Botany, University of Basel, Schoenbeinstrasse 6, 4056 Basel, Switzerland
3
Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editor: Eric O. Freed
Received: 20 April 2015 / Revised: 12 May 2015 / Accepted: 20 May 2015 / Published: 22 May 2015
(This article belongs to the Section Viruses of Plants, Fungi and Protozoa)
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Abstract

Cassava mosaic disease is a major constraint to cassava cultivation worldwide. In India, the disease is caused by Indian cassava mosaic virus (ICMV) and Sri Lankan cassava mosaic virus (SLCMV). The Agrobacterium Ti plasmid virulence gene virE2, encoding a nuclear-localized, single-stranded DNA binding protein, was introduced into Nicotiana benthamiana to develop tolerance against SLCMV. Leaf discs of transgenic N. benthamiana plants, harboring the virE2 gene, complemented a virE2 mutation in A. tumefaciens and produced tumours. Three tested virE2 transgenic plants displayed reduction in disease symptoms upon agroinoculation with SLCMV DNA A and DNA B partial dimers. A pronounced reduction in viral DNA accumulation was observed in all three virE2 transgenic plants. Thus, virE2 is an effective candidate gene to develop tolerance against the cassava mosaic disease and possibly other DNA virus diseases. View Full-Text
Keywords: geminivirus; agroinfection; ssDNA binding; cassava mosaic virus; SLCMV geminivirus; agroinfection; ssDNA binding; cassava mosaic virus; SLCMV
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Resmi, T.R.; Hohn, T.; Hohn, B.; Veluthambi, K. The Agrobacterium tumefaciens Ti Plasmid Virulence Gene virE2 Reduces Sri Lankan Cassava Mosaic Virus Infection in Transgenic Nicotiana benthamiana Plants. Viruses 2015, 7, 2641-2653.

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