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Adaptive divergence generates distinct plastic responses in two closely related Senecio species

Walter, Greg M; Clark, James; Cristaudo, Antonia; Terranova, Delia; Nevado, Bruno; Catara, Stefania; Paunov, Momchil; ... Bridle, Jon R; + view all (2022) Adaptive divergence generates distinct plastic responses in two closely related Senecio species. Evolution , 76 (6) pp. 1229-1245. 10.1111/evo.14478. Green open access

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Abstract

The evolution of plastic responses to external cues allows species to maintain fitness in response to the environmental variation they regularly experience. However, it remains unclear how plasticity evolves during adaptation. To test whether distinct patterns of plasticity are associated with adaptive divergence, we quantified plasticity for two closely related but ecologically divergent Sicilian daisy species (Senecio, Asteraceae). We sampled c.40 representative genotypes of each species from their native range on Mt Etna and then reciprocally transplanted multiple clones of each genotype into four field sites along an elevational gradient that included the native elevational range of each species, and two intermediate elevations. At each elevation we quantified survival and measured leaf traits that included investment (specific leaf area), morphology, chlorophyll fluorescence, pigment content and gene expression. Traits and differentially expressed genes that changed with elevation in one species often showed little change in the other species, or changed in the opposite direction. As evidence of adaptive divergence, both species performed better at their native site and better than the species from the other habitat. Adaptive divergence is therefore associated with the evolution of distinct plastic responses to environmental variation, despite these two species sharing a recent common ancestor. This article is protected by copyright. All rights reserved.

Type: Article
Title: Adaptive divergence generates distinct plastic responses in two closely related Senecio species
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/evo.14478
Publisher version: https://doi.org/10.1111/evo.14478
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Adaptation, adaptive divergence, differential gene expression, environmental sensitivity, evolutionary history, phenotypic plasticity
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
URI: https://discovery.ucl.ac.uk/id/eprint/10146655
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