Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.

Phenological traits often show variation within and among natural populations of annual plants. Nevertheless, the adaptive value of post-anthesis traits is seldom tested. In this study, we estimated the adaptive values of pre- and post-anthesis traits in two stressful environments (water stress and...

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Autores principales:	Benjamin Brachi, Carla Aimé, Cédric Glorieux, Joel Cuguen, Fabrice Roux
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/467795f913a84478aa719e31860e954b
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spelling	oai:doaj.org-article:467795f913a84478aa719e31860e954b2021-11-18T07:26:10ZAdaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.1932-620310.1371/journal.pone.0032069https://doaj.org/article/467795f913a84478aa719e31860e954b2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22403624/?tool=EBIhttps://doaj.org/toc/1932-6203Phenological traits often show variation within and among natural populations of annual plants. Nevertheless, the adaptive value of post-anthesis traits is seldom tested. In this study, we estimated the adaptive values of pre- and post-anthesis traits in two stressful environments (water stress and interspecific competition), using the selfing annual species Arabidopsis thaliana. By estimating seed production and by performing laboratory natural selection (LNS), we assessed the strength and nature (directional, disruptive and stabilizing) of selection acting on phenological traits in A. thaliana under the two tested stress conditions, each with four intensities. Both the type of stress and its intensity affected the strength and nature of selection, as did genetic constraints among phenological traits. Under water stress, both experimental approaches demonstrated directional selection for a shorter life cycle, although bolting time imposes a genetic constraint on the length of the interval between bolting and anthesis. Under interspecific competition, results from the two experimental approaches showed discrepancies. Estimation of seed production predicted directional selection toward early pre-anthesis traits and long post-anthesis periods. In contrast, the LNS approach suggested neutrality for all phenological traits. This study opens questions on adaptation in complex natural environment where many selective pressures act simultaneously.Benjamin BrachiCarla AiméCédric GlorieuxJoel CuguenFabrice RouxPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 3, p e32069 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Benjamin Brachi Carla Aimé Cédric Glorieux Joel Cuguen Fabrice Roux Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
description	Phenological traits often show variation within and among natural populations of annual plants. Nevertheless, the adaptive value of post-anthesis traits is seldom tested. In this study, we estimated the adaptive values of pre- and post-anthesis traits in two stressful environments (water stress and interspecific competition), using the selfing annual species Arabidopsis thaliana. By estimating seed production and by performing laboratory natural selection (LNS), we assessed the strength and nature (directional, disruptive and stabilizing) of selection acting on phenological traits in A. thaliana under the two tested stress conditions, each with four intensities. Both the type of stress and its intensity affected the strength and nature of selection, as did genetic constraints among phenological traits. Under water stress, both experimental approaches demonstrated directional selection for a shorter life cycle, although bolting time imposes a genetic constraint on the length of the interval between bolting and anthesis. Under interspecific competition, results from the two experimental approaches showed discrepancies. Estimation of seed production predicted directional selection toward early pre-anthesis traits and long post-anthesis periods. In contrast, the LNS approach suggested neutrality for all phenological traits. This study opens questions on adaptation in complex natural environment where many selective pressures act simultaneously.
format	article
author	Benjamin Brachi Carla Aimé Cédric Glorieux Joel Cuguen Fabrice Roux
author_facet	Benjamin Brachi Carla Aimé Cédric Glorieux Joel Cuguen Fabrice Roux
author_sort	Benjamin Brachi
title	Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
title_short	Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
title_full	Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
title_fullStr	Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
title_full_unstemmed	Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
title_sort	adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/467795f913a84478aa719e31860e954b
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Adaptive value of phenological traits in stressful environments: predictions based on seed production and laboratory natural selection.

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