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Plant Biotechnology Reports

, Volume 7, Issue 4, pp 425–433 | Cite as

Characterization of SMV resistance of soybean produced by genetic transformation of SMV-CP gene in RNAi

  • Hye Jeong Kim
  • Mi-Jin Kim
  • Jung Hun Pak
  • Ho Won Jung
  • Hong Kyu Choi
  • Yeong-Hoon Lee
  • In-Youl Baek
  • Jong-Min Ko
  • Soon-Chun Jeong
  • In Sook Pack
  • Ki Hyun Ryu
  • Young-Soo ChungEmail author
Original Article

Abstract

Soybean mosaic virus (SMV), a species of the Potyvirus genus in the Potyviridae family, is one of the most typical viral diseases and results in yield and quality loss of cultivated soybean. Due to the depletion of genetic resources for resistance breeding, a trial of genetic transformation to improve disease resistance has been performed by introducing the SMV-CP gene by the RNA interference (RNAi) method via Agrobacterium-mediated transformation. Among 30 transgenic plants produced, 7 lines with enough seeds were infected with SMV and two lines (3 and 4) showed viral resistance to SMV infection. In genomic Southern blot analysis, all the lines tested contained at least one T-DNA insertion. Subsequent investigation confirmed that no viral CP gene expression was detected in two SMV-resistant lines after artificial inoculation of SMV, while non-transgenic control and other transgenic lines expressed substantial amounts of the viral gene. Viral symptoms affected seed morphology, and clean seeds were harvested from the resistant lines. Also, strong viral gene expression was detected from the seeds of susceptible lines. In further generations, the same phenotypic appearance was maintained among non-transgenic and transgenic plants. Finally, the presence of helper component-proteinase (HC-Pro), known as a suppressor of gene silencing apparatus, was checked among transgenic lines. No expression of HC-Pro in resistant lines indicated that the viral CP-RNAi transformation into soybean somehow created a functional gene silencing system and resulted in a viral-resistant phenotype.

Keywords

Soybean mosaic virus (SMV) Coat protein RNA interference Agrobacterium-mediated transformation Helper component proteinase (HC-Pro) 

Notes

Acknowledgments

This research was funded by Dong-A University.

Supplementary material

11816_2013_279_MOESM1_ESM.doc (50 kb)
Supplemental Fig. S1. Confirmation of SMV-CP gene insertion. DNA samples were extracted from wild-type and transgenic plants (T0) to amplify SMV-CP gene insertion in genome with PCR. a The DNA amplification between SMV-CP (forward primer) and Intron (reverse primer). b The DNA amplification between Intron (forward primer) and SMV-CP (reverse primer) (DOC 50 kb)

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Copyright information

© Korean Society for Plant Biotechnology and Springer Japan 2013

Authors and Affiliations

  • Hye Jeong Kim
    • 1
  • Mi-Jin Kim
    • 1
  • Jung Hun Pak
    • 1
  • Ho Won Jung
    • 1
  • Hong Kyu Choi
    • 1
  • Yeong-Hoon Lee
    • 2
  • In-Youl Baek
    • 2
  • Jong-Min Ko
    • 2
  • Soon-Chun Jeong
    • 3
  • In Sook Pack
    • 3
  • Ki Hyun Ryu
    • 4
  • Young-Soo Chung
    • 1
    Email author
  1. 1.Department of Genetic Engineering, College of Natural Resources and Life ScienceDong-A UniversityBusanKorea
  2. 2.Department of Functional CropNICS, RDAMilyangKorea
  3. 3.Bio-Evaluation CenterKorea Research Institute of Bioscience and BiotechnologyCheongwongunKorea
  4. 4.Department of Horticulture Biotechnology and Landscape ArchitectureSeoul Women’s UniversitySeoulKorea

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