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

Viruses

Thulasi Raveendrannair Resmi³  Thomas Hohn²  Barbara Hohn¹  Karuppannan Veluthambi³ 

[1] Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland; E-Mail:;Institute of Botany, University of Basel, Schoenbeinstrasse 6, 4056 Basel, Switzerland; E-Mail:;Department of Plant Biotechnology, School of Biotechnology, Madurai Kamaraj University, Madurai, Tamil Nadu 625021, India; E-Mail:

关键词: geminivirus;    agroinfection;    ssDNA binding;    cassava mosaic virus;    SLCMV;   

DOI  :  10.3390/v7052641

来源: mdpi

【 摘 要 】

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.

【 授权许可】

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.