Horizontal Gene Transfer in Plants: A Review of Mechanisms and Impact

Strategic Insights -

Research conducted at the University of Toulouse, France, has revealed the widespread occurrence of horizontal gene transfer (HGT) in plants, with hundreds of such transfers observed in recently sequenced plant genomes. This phenomenon, significant in bacteria, has only recently gained attention in Eukaryotes. Scientists propose mechanisms that mediate these transfers, detail methods to identify and test HGT, and explore its impact on plant adaptation and functional diversification.

Key Takeaways:

  • Horizontal gene transfer (HGT) has been observed across the tree of life, with a significant occurrence in bacteria and recently considered in Eukaryotes.
  • Research at the University of Toulouse has revealed the widespread occurrence of microbe-plant HGT and plant-plant HGT in the plant kingdom.
  • The researchers propose mechanisms that mediate these transfers, including in situ sequencing and combinations of synthetic biology and experimental evolution.
  • Hundreds of HGT have been identified in recently sequenced plant genomes, including those of the green lineage.
  • HGT is likely to impact plant adaptation and functional diversification, and further research is needed to uncover the full extent of these transfers.
  • The research suggests that expanding phylogenomic scrutiny of the plant kingdom could reveal the full extent of HGT.
  • The methods available to identify and test the robustness of putative HGT include sequence-based and phylogenomic approaches.

Statistics:

  • Hundreds of horizontal gene transfers have been observed in recently sequenced plant genomes.
  • The research proposes that in situ sequencing and combinations of synthetic biology and experimental evolution may allow catching ongoing HGT and testing the functional relevance of such events.
  • The plant kingdom is expected to harbor a vast number of HGT, with the full extent yet to be uncovered through further research.

Sources:

  • The Plant Cell (2025)
  • Mechanisms, Detection, and Impact of Horizontal Gene Transfer in Plant Functional Evolution.
  • NewsRx citation: NewsRx. New Data from University of Toulouse Illuminate Findings in Biotechnology (Mechanisms, Detection, and Impact of Horizontal Gene Transfer in Plant Functional Evolution). Biotech Week. September 17, 2025; p 1571.