Archives of Virology

, Volume 160, Issue 6, pp 1499–1509 | Cite as

Differential response of diverse solanaceous hosts to tomato leaf curl New Delhi virus infection indicates coordinated action of NBS-LRR and RNAi-mediated host defense

  • Nirbhay Kushwaha
  • Ashish Kumar Singh
  • Saumik Basu
  • Supriya ChakrabortyEmail author
Original Article


Tomato leaf curl New Delhi virus (ToLCNDV) is a bipartite begomovirus (family Geminiviridae) that infects a wide range of plants. ToLCNDV has emerged as an important pathogen and a serious threat to tomato production in India. A comparative and molecular analysis of ToLCNDV pathogenesis was performed on diverse solanaceous hosts (Capsicum annuum, Nicotiana benthamiana, N. tabacum, and Solanum lycopersicum). N. benthamiana was found to be the most susceptible host, whereas C. annuum showed resistance against an isolate of ToLCNDV collected in New Delhi from tomato (GenBank accession no. U15015 and U15017). S. lycopersicum and N. tabacum developed conspicuous symptoms and allowed virus to accumulate to significantly high titers. The viral DNA level was concurrent with symptom severity. ToLCNDV-specific siRNA levels were directly proportional to the amount of viral DNA. To investigate the basis for the differences in response of these hosts to ToLCNDV, a comparative expression analysis of selected defense-related genes was carried out. The results indicated differences in expression levels of genes involved in the posttranscriptional gene silencing machinery (RDR6, AGO1 and SGS3) as well as basal host defense responses (nucleotide-binding site and leucine-rich repeat [NBS-LRR] proteins and lipid transfer protein [LTP]). Among these, expression of NBS-LRR genes was found to be significantly higher in C. annuum following ToLCNDV infection. Our analyses suggest that the expression of host defense responses determines the level of ToLCNDV accumulation and degree of symptom development.


Cucumber Mosaic Virus Lipid Transfer Protein Tomato Leaf Viral Suppressor Tomato Golden Mosaic Virus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors thank Dr. Veerendra Kumar Sharma for his critical comments and discussion. This work was funded by the Department of Biotechnology, Govt. of India (Grant No. BT/PR6504/AGII/106/878/2012).

Conflict of interest

The authors do not have any conflict of interest.


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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • Nirbhay Kushwaha
    • 1
  • Ashish Kumar Singh
    • 1
  • Saumik Basu
    • 1
  • Supriya Chakraborty
    • 1
    Email author
  1. 1.Molecular Virology Laboratory, School of Life SciencesJawaharlal Nehru UniversityNew DelhiIndia

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