Deep conservation shapes plant regulatory evolution.

Reconstructed plant cis-regulatory evolution across 300 million years shows widespread conservation of noncoding sequences that stabilize core developmental programs while permitting regulatory innovation.

• Why it matters: The work addresses a long-standing paradox in gene regulation: how regulatory systems can both remain stable and still evolve new control.
• What they did: Amundson et al. reconstructed cis-regulatory evolution over 300 million years and compared noncoding elements to infer patterns of conservation and change.
• The result: The findings resolve the paradox by linking ancient conserved elements to core program stability and suggesting a comparative framework for precision engineering of plant traits.

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