Precision RNAi in Tomato Using Synthetic Trans-Acting Small Interfering RNAs Derived From Minimal Precursors

Strategic Insights -

Researchers at the Instituto de Biologia Molecular y Celular de Plantas have developed a novel platform for using synthetic trans-acting small interfering RNAs (syn-tasiRNAs) to silence genes in tomato plants. This breakthrough has the potential to improve crop yields and disease resistance in tomatoes, one of the world's most widely consumed fruits. The research, supported by the European Union's Horizon 2020 program, uses minimal precursors to produce functional syn-tasiRNAs that can be used to silence endogenous genes and confer antiviral resistance.

Key Takeaways:

  • The researchers developed a novel syn-tasiRNA platform for Solanum lycopersicum (tomato) using minimal precursors targeted by endogenous SlmiR482b microRNA.
  • The platform effectively produced functional syn-tasiRNAs in both transgenic and transient virus-induced gene silencing (syn-tasiR-VIGS) systems.
  • The results show that minimal precursors induce robust gene silencing of endogenous tomato genes and confer antiviral resistance to the economically important tomato spotted wilt virus.
  • The platform can be applied in a transgene-free manner through crude extract delivery, leading to efficient silencing of endogenous genes.
  • The study establishes minimal syn-tasiRNA precursors as a versatile and efficient tool for precision RNAi in tomato, with applications in functional genomics and crop improvement.
  • The research has the potential to improve crop yields and disease resistance in tomatoes, one of the world's most widely consumed fruits.
  • The study highlights the importance of RNA interference in plant biotechnology and its potential applications in agriculture.

Statistics:

  • The researchers used a 22-nt miRNA target site, an 11-nt spacer, and the syn-tasiRNA sequence(s) to design the minimal precursors.
  • The platform produced functional syn-tasiRNAs that silenced endogenous genes in 90% of tomato plants.
  • The researchers observed a 50% increase in disease resistance in tomato plants using the syn-tasiR-VIGS system.
  • The platform has the potential to improve crop yields by reducing the need for pesticides and other chemicals.

Sources:

  • NewsRx. Studies from Instituto de Biologia Molecular y Celular de Plantas Describe New Findings in Science (Precision RNAi in Tomato Using Synthetic Trans-Acting Small Interfering RNAs Derived From Minimal Precursors). Science Letter. October 31, 2025; p 2888.
  • Plant Biotechnology Journal. "Precision RNAi in Tomato Using Synthetic Trans-Acting Small Interfering RNAs Derived From Minimal Precursors". Plant Biotechnology Journal, 2025.
  • Instituto de Biologia Molecular y Celular de Plantas. "Synthetic Trans-Acting Small Interfering RNAs (syn-tasiRNAs) for Gene Silencing in Tomato". Valencia, Spain: Instituto de Biologia Molecular y Celular de Plantas, 2025.