Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments

Abstract Interspecific competition reduces resource availability and can affect evolution. We quantified multivariate selection in the presence and absence of strong interspecific competition using a greenhouse experiment with 35 natural accessions of Arabidopsis thaliana. We assessed selection on n...

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Autores principales:	Kattia Palacio-Lopez, Christian M. King, Jonathan Bloomberg, Stephen M. Hovick
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/e38102c5a02d4e8aba73d622bc080f19
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spelling	oai:doaj.org-article:e38102c5a02d4e8aba73d622bc080f192021-12-02T16:18:03ZNatural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments10.1038/s41598-020-77444-w2045-2322https://doaj.org/article/e38102c5a02d4e8aba73d622bc080f192020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77444-whttps://doaj.org/toc/2045-2322Abstract Interspecific competition reduces resource availability and can affect evolution. We quantified multivariate selection in the presence and absence of strong interspecific competition using a greenhouse experiment with 35 natural accessions of Arabidopsis thaliana. We assessed selection on nine traits representing plant phenology, growth, and architecture, as well as their plasticities. Competition reduced biomass and fitness by over 98%, and plastic responses to competition varied by genotype (significant G × E) for all traits except specific leaf area (SLA). Competitive treatments altered selection on flowering phenology and plant architecture, with significant selection on all phenology traits and most architecture traits under competition-present conditions but little indication that selection occurred in the absence of competitors. Plasticity affected fitness only in competition-present conditions, where plasticity in flowering time and early internode lengths was adaptive. The competitive environment caused changes in the trait correlation structure and surprisingly reduced phenotypic integration, which helped explain some of the observed selection patterns. Despite this overall shift in the trait correlation matrix, genotypes with delayed flowering had lower SLA (thicker, tougher leaves) regardless of the competitive environment, a pattern we have not seen previously reported in the literature. Overall, our study highlights multiple ways in which interspecific competition can alter selective regimes, contributing to our understanding of variability in selection processes over space and time.Kattia Palacio-LopezChristian M. KingJonathan BloombergStephen M. HovickNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kattia Palacio-Lopez Christian M. King Jonathan Bloomberg Stephen M. Hovick Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
description	Abstract Interspecific competition reduces resource availability and can affect evolution. We quantified multivariate selection in the presence and absence of strong interspecific competition using a greenhouse experiment with 35 natural accessions of Arabidopsis thaliana. We assessed selection on nine traits representing plant phenology, growth, and architecture, as well as their plasticities. Competition reduced biomass and fitness by over 98%, and plastic responses to competition varied by genotype (significant G × E) for all traits except specific leaf area (SLA). Competitive treatments altered selection on flowering phenology and plant architecture, with significant selection on all phenology traits and most architecture traits under competition-present conditions but little indication that selection occurred in the absence of competitors. Plasticity affected fitness only in competition-present conditions, where plasticity in flowering time and early internode lengths was adaptive. The competitive environment caused changes in the trait correlation structure and surprisingly reduced phenotypic integration, which helped explain some of the observed selection patterns. Despite this overall shift in the trait correlation matrix, genotypes with delayed flowering had lower SLA (thicker, tougher leaves) regardless of the competitive environment, a pattern we have not seen previously reported in the literature. Overall, our study highlights multiple ways in which interspecific competition can alter selective regimes, contributing to our understanding of variability in selection processes over space and time.
format	article
author	Kattia Palacio-Lopez Christian M. King Jonathan Bloomberg Stephen M. Hovick
author_facet	Kattia Palacio-Lopez Christian M. King Jonathan Bloomberg Stephen M. Hovick
author_sort	Kattia Palacio-Lopez
title	Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
title_short	Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
title_full	Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
title_fullStr	Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
title_full_unstemmed	Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments
title_sort	natural selection on traits and trait plasticity in arabidopsis thaliana varies across competitive environments
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/e38102c5a02d4e8aba73d622bc080f19
work_keys_str_mv	AT kattiapalaciolopez naturalselectionontraitsandtraitplasticityinarabidopsisthalianavariesacrosscompetitiveenvironments AT christianmking naturalselectionontraitsandtraitplasticityinarabidopsisthalianavariesacrosscompetitiveenvironments AT jonathanbloomberg naturalselectionontraitsandtraitplasticityinarabidopsisthalianavariesacrosscompetitiveenvironments AT stephenmhovick naturalselectionontraitsandtraitplasticityinarabidopsisthalianavariesacrosscompetitiveenvironments
_version_	1718384205033897984

Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments

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