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Generation, Amplification, and Titration of Recombinant Respiratory Syncytial Viruses
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Multiple virus resistance using artificial trans-acting siRNAs.

Lingyun Chen1, Xiaofei Cheng2, Jianyu Cai1

  • 1College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Lin'an 311300, Zhejiang, PR China.

Journal of Virological Methods
|November 13, 2015
PubMed
Summary

Plant TAS genes can be engineered to produce artificial trans-acting siRNAs (ta-siRNAs) for broad virus resistance. This study demonstrates successful engineering of TAS3a to target Turnip mosaic virus and Cucumber mosaic virus in Arabidopsis.

Keywords:
Artificial trans-acting siRNACucumber mosaic virusMultiple virus resistanceTASTurnip mosaic virus

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Area of Science:

  • Plant molecular biology
  • RNA interference (RNAi)
  • Plant virology

Background:

  • Trans-acting siRNAs (ta-siRNAs) are generated from TAS transcripts and guide mRNA cleavage.
  • TAS transcripts can be processed into multiple ta-siRNAs, offering potential for targeting multiple genes.
  • RNA interference is a key mechanism for gene regulation and defense in plants.

Purpose of the Study:

  • To engineer plant TAS genes to express artificial ta-siRNAs (ata-siRNAs).
  • To assess the efficacy of ata-siRNAs in conferring resistance against multiple plant viruses.
  • To explore the potential of TAS gene modification for developing broad-spectrum virus resistance strategies.

Main Methods:

  • Engineering the Arabidopsis TAS3a gene to produce ata-siRNAs targeting Turnip mosaic virus (TuMV) and Cucumber mosaic virus (CMV).
  • Generating transgenic Arabidopsis thaliana plants expressing the engineered TAS3a construct.
  • Evaluating the resistance of transgenic plants to TuMV and CMV infection.

Main Results:

  • Transgenic Arabidopsis thaliana plants expressing ata-siRNAs exhibited high resistance to both TuMV and CMV.
  • The engineered TAS3a successfully produced functional ata-siRNAs capable of targeting viral genomes.
  • Demonstrated successful application of TAS gene engineering for multi-virus resistance.

Conclusions:

  • Plant TAS genes can be modified to generate ata-siRNAs for effective multi-virus resistance.
  • This approach offers a promising strategy for developing robust and broad-spectrum virus resistance in crops.
  • TAS gene-based RNAi strategies have significant potential for agricultural applications in plant protection.