ArticleEvolution; international journal of organic evolution2015
Natural variation, differentiation, and genetic trade-offs of ecophysiological traits in response to water limitation in Brachypodium distachyon and its descendent allotetraploid B. hybridum (Poaceae).
Article in Evolution; international journal of organic evolution, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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24 citing papers in PubMed.
- Drivers of insect herbivory resistance and tolerance to plant damage in the Brachypodium distachyon species complex.American journal of botany · 2026Article
- The genetic structure of aPeerJ · 2026Article
- Genomic and evolutionary evidence for drought adaptation of allopolyploid Brachypodium hybridum.Journal of experimental botany · 2025Article
- Intraspecific trait variation and adaptability ofEcology and evolution · 2023Article
- Ecophysiological Differentiation among Two Resurrection Ferns and Their Allopolyploid Derivative.Plants (Basel, Switzerland) · 2023Article
- Patterns of pan-genome occupancy and gene coexpression under water-deficit in Brachypodium distachyon.Molecular ecology · 2022Article
- Multivariate selection mediated by aridity predicts divergence of drought-resistant traits along natural aridity gradients of an invasive weed.The New phytologist · 2022Article
- Analysis of genotype-by-environment interactions in a maize mapping population.G3 (Bethesda, Md.) · 2022Article
- Comparative Genomics, Evolution, and Drought-Induced Expression of Dehydrin Genes in ModelPlants (Basel, Switzerland) · 2021Article
- Evolutionary and plastic changes in a native annual plant after a historic drought.Ecology and evolution · 2020Article
- Different Patterns of Ecological Divergence Between Two Tetraploids and Their Diploid Counterpart in a Parapatric Linear Coastal Distribution Polyploid Complex.Frontiers in plant science · 2020Article
- Uncovering hidden genetic variation in photosynthesis of field-grown maize under ozone pollution.Global change biology · 2019Article
- Increased water use efficiency and water productivity of arabidopsis by abscisic acid receptors from Populus canescens.Annals of botany · 2019Article
- Functional trait divergence and trait plasticity confer polyploid advantage in heterogeneous environments.The New phytologist · 2019Article
- Review
- Variation in functional responses to water stress and differentiation between natural allopolyploid populations in the Brachypodium distachyon species complex.Annals of botany · 2018Article
- Article
- Neutral molecular markers support common origin of aluminium tolerance in three congeneric grass species growing in acidic soils.AoB PLANTS · 2017Article
- Factors influencing distribution and local coexistence of diploids and tetraploids of Vicia cracca: inferences from a common garden experiment.Journal of plant research · 2017Article
- Environmental isolation explains Iberian genetic diversity in the highly homozygous model grass Brachypodium distachyon.BMC evolutionary biology · 2017Article
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Abstract
Differences in tolerance to water stress may underlie ecological divergence of closely related ploidy lineages. However, the mechanistic basis of physiological variation governing ecogeographical cytotype segregation is not well understood. Here, using Brachypodium distachyon and its derived allotetraploid B. hybridum as model, we test the hypothesis that, for heteroploid annuals, ecological divergence of polyploids in drier environments is based on trait differentiation enabling drought escape. We demonstrate that under water limitation allotetraploids maintain higher photosynthesis and stomatal conductance and show earlier flowering than diploids, concordant with a drought-escape strategy to cope with water stress. Increased heterozygosity and greater genetic variability and plasticity of polyploids could confer a superior adaptive capability. Consistent with these predictions, we document (1) greater standing within-population genetic variation in water-use efficiency (WUE) and flowering time in allotetraploids, and (2) the existence of (nonlinear) environmental clines in physiology across allotetraploid populations. Increased gas exchange and diminished WUE occurred at the driest end of the gradient, consistent with a drought-escape strategy. Finally, we found that allotetraploids showed weaker genetic correlations than diploids congruous with the expectation of relaxed pleiotropic constraints in polyploids. Our results suggest evolutionary divergence of ecophysiological traits in each ploidy lineage.
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