Unearthing Modes of Climatic Adaptation in Underground Storage Organs Across Liliales.

Autor: Tribble CM; School of Life Sciences, University of Hawai'i at Mānoa, Honolulu, HI 96822, USA., May MR; Department of Integrative, Biology University of California, Berkeley, CA 94709, USA.; University Herbarium, University of California, Berkeley, CA 94709, USA.; Department of Evolution and Ecology, University of California, Davis, CA 95616, USA., Jackson-Gain A; Department of Integrative, Biology University of California, Berkeley, CA 94709, USA.; University Herbarium, University of California, Berkeley, CA 94709, USA., Zenil-Ferguson R; Department of Biology, University of Kentucky, Lexington, KY 40506, USA., Specht CD; Section of Plant Biology and L.H. Bailey Hortorium, School of Integrative Plant Sciences, Cornell University, Ithaca, NY 14853, USA., Rothfels CJ; Department of Integrative, Biology University of California, Berkeley, CA 94709, USA.; University Herbarium, University of California, Berkeley, CA 94709, USA.; Department of Biology, Utah State University, Logan, UT 84322, USA.
Jazyk: angličtina
Zdroj: Systematic biology [Syst Biol] 2023 May 19; Vol. 72 (1), pp. 198-212.
DOI: 10.1093/sysbio/syac070
Abstrakt: Testing adaptive hypotheses about how continuous traits evolve in association with developmentally structured discrete traits, while accounting for the confounding influence of other, hidden, evolutionary forces, remains a challenge in evolutionary biology. For example, geophytes are herbaceous plants-with underground buds-that use underground storage organs (USOs) to survive extended periods of unfavorable conditions. Such plants have evolved multiple times independently across all major vascular plant lineages. Even within closely related lineages, however, geophytes show impressive variation in the morphological modifications and structures (i.e.,"types" of USOs) that allow them to survive underground. Despite the developmental and structural complexity of USOs, the prevailing hypothesis is that they represent convergent evolutionary "solutions" to a common ecological problem, though some recent research has drawn this conclusion into question. We extend existing phylogenetic comparative methods to test for links between the hierarchical discrete morphological traits associated with USOs and adaptation to environmental variables, using a phylogeny of 621 species in Liliales. We found that plants with different USO types do not differ in climatic niche more than expected by chance, with the exception of root morphology, where modified roots are associated with lower temperature seasonality. These findings suggest that root tubers may reflect adaptations to different climatic conditions than those represented by other types of USOs. Thus, the tissue type and developmental origin of the USO structure may influence the way it mediates ecological relationships, which draws into question the appropriateness of ascribing broad ecological patterns uniformly across geophytic taxa. This work provides a new framework for testing adaptive hypotheses and for linking ecological patterns across morphologically varying taxa while accounting for developmental (non-independent) relationships in morphological data. [Climatic niche evolution; geophytes; imperfect correspondence; macroevolution.].
(© The Author(s) 2023. Published by Oxford University Press, on behalf of the Society of Systematic Biologists. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
Databáze: MEDLINE
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