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Salinity is an agent of divergent selection driving local adaptation of arabidopsis to coastal habitats

Busoms, Silvia; Teres, Joana; Huang, Xin Yuan; Bomblies, Kirsten; Danku, John; Douglas, Alex; Weigel, Detlef; Poschenrieder, Charlotte; Salt, David E.

Authors

Silvia Busoms

Joana Teres

Xin Yuan Huang

Kirsten Bomblies

John Danku

Alex Douglas

Detlef Weigel

Charlotte Poschenrieder

David E. Salt



Abstract

© 2015 American Society of Plant Biologists. All rights reserved. Understanding the molecular mechanism of adaptive evolution in plants provides insights into the selective forces driving adaptation and the genetic basis of adaptive traits with agricultural value. The genomic resources available for Arabidopsis (Arabidopsis thaliana) make it well suited to the rapid molecular dissection of adaptive processes. Although numerous potentially adaptive loci have been identified in Arabidopsis, the consequences of divergent selection and migration (both important aspects of the process of local adaptation) for Arabidopsis are not well understood. Here, we use a multiyear field-based reciprocal transplant experiment to detect local populations of Arabidopsis composed of multiple small stands of plants (demes) that are locally adapted to the coast and adjacent inland habitats in northeastern Spain. We identify fitness tradeoffs between plants from these different habitats when grown together in inland and coastal common gardens and also, under controlled conditions in soil excavated from coastal and inland sites. Plants from the coastal habitat also outperform those from inland when grown under high salinity, indicating local adaptation to soil salinity. Sodium can be toxic to plants, and we find its concentration to be elevated in soil and plants sampled at the coast. We conclude that the local adaptation that we observe between adjacent coastal and inland populations is caused by ongoing divergent selection driven by the differential salinity between coastal and inland soils.

Journal Article Type Article
Publication Date Jul 6, 2015
Journal Plant Physiology
Print ISSN 0032-0889
Electronic ISSN 1532-2548
Publisher American Society of Plant Biologists
Peer Reviewed Peer Reviewed
Volume 168
Issue 3
Pages 915-929
APA6 Citation Busoms, S., Teres, J., Huang, X. Y., Bomblies, K., Danku, J., Douglas, A., …Salt, D. E. (2015). Salinity is an agent of divergent selection driving local adaptation of arabidopsis to coastal habitats. Plant Physiology, 168(3), 915-929. https://doi.org/10.1104/pp.15.00427
DOI https://doi.org/10.1104/pp.15.00427
Publisher URL http://www.plantphysiol.org/content/168/3/915
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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