Jumping DNA bits help plants evolve new survival tricks
Genome Evolution
The ability of crops and wild plants to adapt to drought, heat, or pests may trace back to these restless bits of DNA quietly rewriting gene switches inside every cell.
Plant DNA is full of mobile genetic bits called transposable elements that can copy themselves and jump to new spots in the genome. Scientists used to see them as harmless junk or even genomic troublemakers, but new high-resolution genome maps show these jumping bits often land near genes and change when and how strongly those genes get used. That means the very elements plants have spent eons trying to suppress may also be a secret engine behind how plants evolve and adapt to new conditions.
Key Findings
Telomere-to-telomere and pan-genome assemblies now allow detailed mapping of transposable element architecture and structural variation across many plant species.
Plants use epigenetic silencing to control transposable elements, while the elements have evolved countermeasures to escape suppression, creating an ongoing evolutionary arms race.
Transposable elements contribute new protein-coding modules and cis-regulatory elements that reshape chromatin structure and gene regulatory networks, driving adaptation.
chevron_right Technical Summary
Scientists show that the 'junk DNA' fragments known as transposable elements aren't just genomic freeloaders, they actively rewire how plant genes turn on and off, helping plants adapt to new environments and evolve novel traits over time.
Abstract Preview
Original paper
Transposable elements: Drivers of regulatory innovation and adaptation in plants
Transposable elements (TEs) constitute a major fraction of eukaryotic genomes and represent one of the most abundant classes of repetitive sequences in plants. Recent advances in sequencing technol...
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Epigenetics examines how gene activity changes without altering the DNA sequence itself, through molecular modifications that can persist and be inherited across cell divisions. In plant science, this is vital because it explains how plants adapt to environmental stresses and developmental signals
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