Evolution of the leaf economics spectrum in herbs: Evidence from environmental divergences in leaf physiology across Helianthus (Asteraceae)

Evolution; International Journal of Organic Evolution
Chase M Mason, Lisa A Donovan

Abstract

The leaf economics spectrum (LES) describes a major axis of plant functional trait variation worldwide, defining suites of leaf traits aligned with resource-acquisitive to resource-conservative ecological strategies. The LES has been interpreted to arise from leaf-level trade-offs among ecophysiological traits common to all plants. However, it has been suggested that the defining leaf-level trade-offs of the LES may not hold within specific functional groups (e.g., herbs) nor within many groups of closely related species, which challenges the usefulness of the LES paradigm across evolutionary scales. Here, we examine the evolution of the LES across 28 species of the diverse herbaceous genus Helianthus (the sunflowers), which occupies a wide range of habitats and climate variation across North America. Using a phylogenetic comparative approach, we find repeated evolution of more resource-acquisitive LES strategies in cooler, drier, and more fertile environments. We also find macroevolutionary correlations among LES traits that recapitulate aspects of the global LES, but with one major difference: leaf mass per area is uncorrelated with leaf lifespan. This indicates that whole-plant processes likely drive variation in leaf lifesp...Continue Reading

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Citations

Jun 4, 2016·Nature Plants·Christine ScoffoniLawren Sack
Mar 24, 2018·Ecology Letters·Leander D L AndereggJanneke HilleRisLambers
Nov 20, 2015·The New Phytologist·Chase M MasonLisa A Donovan
Oct 29, 2018·American Journal of Botany·Leila R FletcherLawren Sack
Feb 16, 2019·American Journal of Botany·Nora Mitchell, Kent E Holsinger
Feb 23, 2019·Evolution; International Journal of Organic Evolution·David B LowryLiza M Holeski
Mar 9, 2019·The Journal of Heredity·Jordan A DowellChase M Mason
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Feb 7, 2017·The New Phytologist·Christopher D MuirJeroni Galmés
Sep 22, 2017·Frontiers in Plant Science·Le LiDali Guo
Mar 28, 2017·Plant, Cell & Environment·Jamie Males, Howard Griffiths
Feb 26, 2021·Ecology·Jennifer L FunkJoni Ricks-Oddie
Jun 3, 2021·Proceedings. Biological Sciences·Barbara M Neto-BradleyMatthew W Pennell
Jul 1, 2020·Trends in Ecology & Evolution·Nianpeng HeGuirui Yu

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