Wild mustard plants rewrite their gene activity by elevation and season
Martínez-Pérez A, de la Mata R, Romero-Campero FJ, Gómez R, Calonje M
Climate Adaptation
The seedy little weed sprouting in sidewalk cracks each spring is running a genetic program tuned to its exact patch of ground, which is a reminder that the 'weeds' in your yard are quietly adapted specialists, not generic filler.
Scientists planted the same small mustard weed at different elevations on a mountainside in Spain and tracked which genes turned on and off throughout the day, across seasons, and between years. They found that plants from different elevations, which naturally flower at different times, also show matching differences in their gene activity, especially in the genes that control flowering and the internal clock. It's a rare look at how plants actually behave in nature, not just in a climate-controlled lab.
Key Findings
Common garden experiments across two contrasting years and an altitudinal gradient in southern Spain measured whole-genome gene expression at diurnal, seasonal, and annual timescales in Arabidopsis thaliana.
Most differentially expressed genes, including many flowering-pathway genes, were shared across all natural accessions, but accessions with more similar early flowering times also had more similar gene expression patterns.
Flowering time genes from the photoperiod and circadian clock pathways showed the strongest links between local adaptation and gene expression across timescales.
chevron_right Technical Summary
Wild populations of the plant Arabidopsis thaliana growing at different mountain elevations in Spain adjust both their flowering timing and their gene activity to match their local climate, showing that plants fine-tune their genetics to their exact environment in ways lab-grown plants never reveal.
Abstract Preview
Original paper
Locally adapted Arabidopsis thaliana accessions show transcriptomic plasticity in a multi-timescale analysis of whole-genome gene expression in a natural environment.
Discerning the genes, regulatory networks and environmental cues involved in plant development represents a major goal in the plant sciences. However, genes and regulatory networks have not evolved...
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Arabidopsis thaliana, the thale cress, mouse-ear cress or arabidopsis, is a small plant from the mustard family (Brassicaceae), native to Eurasia and Africa. Commonly found along the shoulders of roads and in disturbed land, it is generally considered a weed.