Sugarcane Mosaic Virus-Based Gene Silencing in Nicotiana benthamiana

Authors

  • Abdul Qayyum Rao Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
  • Farooq Ihsan Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
  • Idrees Ahmad Nasir Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
  • Muhammad Rafiq Institute of Clinical Psychology, University of Management and Technology, Lahore, Pakistan
  • Sajed Ali Department of Biotechnology, School of Sciences, University of Management and Technology, Sialkot Campus, Sialkot, Pakistan|Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
  • Shahid Javed Butt Department of Biotechnology, School of Sciences, University of Management and Technology, Sialkot Campus, Sialkot, Pakistan
  • Tayyab Husnain Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
Abstract:

Background:Potyvirus-based virus-induced gene silencing (VIGS) is used for knocking down the expression of a target gene in numerous plant species. Sugarcane mosaic virus (SCMV) is a monopartite, positive single strand RNA virus. Objectives:pBINTRA6 vector was modified by inserting a gene segment of SCMV in place of Tobacco rattle virus (TRV) genome part 1 (TRV1 or RNA1) and the two nonstructural proteins of TRV2(RNA2). Materials and Methods:SCMV construct was inoculated into 3-4 weeks Nicotiana benthamiana plant leaves either by using a needleless syringe or applying pricking with a toothpick. Results:The construct (SCMV-RNA2) successfully induced post-transcriptional gene silencing (PTGS) of the target genes GFP and ChlI through agroinoculation proving that SCMV is a substitute of the RNA1, which plays a pivotal role in the systemic gene silencing. 2-3-weeks of post inoculation, target genes’ silencing was observed in the newly developed non-inoculated leaves. Conclusions:The newly developed construct expresses the knocked down of the endogenous as well as exogenous genes and only four weeks are required for the transient expression of the gene silencing based on SCMV-VIGS system.  

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Journal title

volume 15  issue 4

pages  260- 267

publication date 2017-10-29

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