With climate changing, Southern plants do better than Northern locals

May 20, 2014
With climate changing, Southern plants do better than Northern locals
Arabidopsis thaliana Credit: Wikipedia

Can plants and animals evolve to keep pace with climate change? A study published May 19 in the journal Proceedings of the National Academy of Sciences shows that for at least one widely-studied plant, the European climate is changing fast enough that strains from Southern Europe already grow better in the north than established local varieties.

Small and fast-growing, Arabidopsis thaliana is widely used as the "lab mouse" of . The plant grows in Europe from Spain to Scandinavia and because Arabidopsis is so well-studied, there is a reference collection of seeds derived from wild stocks across its native range. Originally collected from 20 to 50 years ago, these plants have since been maintained under controlled conditions in the .

Johanna Schmitt, formerly at Brown University and now a distinguished professor in the UC Davis Department of Evolution and Ecology, and colleagues took banked seed samples originally from Spain, England, Germany and Finland and raised all the plants in gardens in all four locations.

"The southern imports do better across the range than locals," Schmitt said. "This shows that the adaptive optimum has moved really fast."

Seed stocks banked decades ago may no longer be the best for their locations of origin, she said, although they still may be critical for preserving genetic diversity, especially from warmer parts of the species range that may facilitate adaptation to future climates.

Whether wild Arabidopsis can evolve fast enough to thrive in warming conditions, or southern varieties move north fast enough to replace northern strains, remains an open question, Schmitt said.

Arabidopsis is a fast-growing, short-lived species. For forest managers, there is another question: can trees that sprouted 30 or 40 years ago adapt in place to a rapidly changing climate?

"This is a concern for foresters—trees live a long time, but will they die if the climate rug is pulled out from under them?" Schmitt said.

Explore further: Plants with dormant seeds give rise to more species

More information: Paper: www.pnas.org/content/early/201… /1406314111.abstract

add to favorites email to friend print save as pdf

Related Stories

Plants with dormant seeds give rise to more species

Apr 18, 2014

Seeds that sprout as soon as they're planted may be good news for a garden. But wild plants need to be more careful. In the wild, a plant whose seeds sprouted at the first warm spell or rainy day would risk disaster. More ...

Recommended for you

Study finds tropical fish moving into temperate waters

Dec 19, 2014

Tropical herbivorous fish are beginning to expand their range into temperate waters – likely as a result of climate change – and a new international study documents the dramatic impact of the intrusion ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

AlexCoe
not rated yet May 20, 2014
Since the seed growth wasn't studied when they were collected as a baseline, prior to banking, it proves only that the southern variety grows faster, nothing more.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.