Drivers of phenotypic variation and plasticity to drought in populations of a Mediterranean shrub along an environmental gradient

dc.contributor.authorRamos-Muñoz, Marina
dc.contributor.authorCastellanos, María Clara
dc.contributor.authorBlanco-Sánchez, Mario
dc.contributor.authorPías, Beatriz
dc.contributor.authorRamírez-Valiente, José Alberto
dc.contributor.authorBenavides, Raquel
dc.contributor.authorEscudero, Adrián
dc.contributor.authorMatesanz, Silvia
dc.date.accessioned2024-10-28T15:19:34Z
dc.date.available2024-10-28T15:19:34Z
dc.date.issued2024-10-18
dc.description.abstractAssessing the factors driving intraspecific phenotypic variation is crucial to understand the evolutionary trajectories of plant populations and predict their vulnerability to climate change. Environmental gradients often lead to phenotypic divergence in functional traits and their plasticity across populations. We studied the entire environmental range of the Mediterranean gypsum endemic shrub Helianthemum squamatum to evaluate the factors underlying quantitative population differentiation and phenotypic plasticity to drought, using a common garden with 16 populations that covered the main geographic and the entire climatic range of the species. Sampling followed a hierarchical approach to assess trait genetic variation within and among four distinct geographical regions. We found high but similar plastic responses across populations, which were consistent with adaptive plasticity to drought, including advanced phenology, more sclerophyllous leaves, higher water use efficiency and larger seeds in dry conditions. Despite these generally similar plastic responses, we found significant population differentiation in quantitative traits, part of which was structured at the regional scale. Such differentiation was not associated with environmental variation, including differences in climate and soil conditions. This suggests that non-adaptive processes might have had a role on genetic differentiation in H. squamatum, likely due to the island-like configuration of gypsum habitats and the lack of effective seed dispersal of the study species. Our results emphasize the role of phenotypic plasticity in adaptive drought response and the importance of considering both adaptive and non-adaptive processes shaping intraspecific phenotypic variation, which is crucial for predicting plant population vulnerability to climate changees
dc.identifier.citationMarina Ramos-Muñoz, María Clara Castellanos, Mario Blanco-Sánchez, Beatriz Pías, José Alberto Ramírez-Valiente, Raquel Benavides, Adrián Escudero, Silvia Matesanz, Drivers of phenotypic variation and plasticity to drought in populations of a Mediterranean shrub along an environmental gradient, Environmental and Experimental Botany, 2024, 106011, ISSN 0098-8472, https://doi.org/10.1016/j.envexpbot.2024.106011es
dc.identifier.doi10.1016/j.envexpbot.2024.106011es
dc.identifier.issn1873-7307 (online)
dc.identifier.issn0098-8472 (print
dc.identifier.urihttps://hdl.handle.net/10115/40788
dc.language.isoenges
dc.publisherElsevieres
dc.rightsAtribución-NoComercial 4.0 Internacional*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectintraspecific trait variationes
dc.subjectgypsophileses
dc.subjectnatural selectiones
dc.subjectphenotypic plasticityes
dc.subjectpopulation differentiationes
dc.subjectnon-adaptive evolutiones
dc.titleDrivers of phenotypic variation and plasticity to drought in populations of a Mediterranean shrub along an environmental gradientes
dc.typeinfo:eu-repo/semantics/articlees

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