Independent evolutionary changes in fine‐root traits among main clades during the diversification of seed plants
Abstract
Summary Changes in fine‐root morphology are typically associated with transitions from the ancestral arbuscular mycorrhizal (AM) to the alternative ectomycorrhizal (ECM) or nonmycorrhizal (NM) associations. However, the modifications in root morphology may also coincide with new modifications in leaf hydraulics and growth habit during angiosperm diversification. These hypotheses have not been evaluated concurrently, and this limits our understanding of the causes of fine‐root evolution. To explore the evolution of fine‐root systems, we assembled a 600+ species database to reconstruct historical changes in seed plants over time. We utilise ancestral reconstruction approaches together with phylogenetically informed comparative analyses to test whether changes in fine‐root traits were most strongly associated with mycorrhizal affiliation, leaf hydraulics or growth form. Our findings showed significant shifts in root diameter, specific root length and root tissue density as angiosperms diversified, largely independent from leaf changes or mycorrhizal affiliation. Growth form was the only factor associated with fine‐root traits in statistical models including mycorrhizal association and leaf venation, suggesting substantial modifications in fine‐root morphology during transitions from woody to nonwoody habits. Divergences in fine‐root systems were crucial in the evolution of seed plant lineages, with important implications for ecological processes in terrestrial ecosystems.
- Authors:
-
[1];
[2];
[1];
[3]
- International Center for Tropical Biodiversity Department of Biological Sciences Florida International University Miami FL 33199 USA
- Department of Integrative Biology University of Guelph 50 Stone Road East Guelph ON N1G 2W1 Canada
- Department of Biological Sciences Kent State University Kent OH 44242 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1638324
- Grant/Contract Number:
- DE‐SC0004335
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- New Phytologist
- Additional Journal Information:
- Journal Name: New Phytologist Journal Volume: 228 Journal Issue: 2; Journal ID: ISSN 0028-646X
- Publisher:
- Wiley-Blackwell
- Country of Publication:
- United Kingdom
- Language:
- English
Citation Formats
Valverde‐Barrantes, Oscar J., Maherali, Hafiz, Baraloto, Christopher, and Blackwood, Christopher B. Independent evolutionary changes in fine‐root traits among main clades during the diversification of seed plants. United Kingdom: N. p., 2020.
Web. doi:10.1111/nph.16729.
Valverde‐Barrantes, Oscar J., Maherali, Hafiz, Baraloto, Christopher, & Blackwood, Christopher B. Independent evolutionary changes in fine‐root traits among main clades during the diversification of seed plants. United Kingdom. https://doi.org/10.1111/nph.16729
Valverde‐Barrantes, Oscar J., Maherali, Hafiz, Baraloto, Christopher, and Blackwood, Christopher B. Mon .
"Independent evolutionary changes in fine‐root traits among main clades during the diversification of seed plants". United Kingdom. https://doi.org/10.1111/nph.16729.
@article{osti_1638324,
title = {Independent evolutionary changes in fine‐root traits among main clades during the diversification of seed plants},
author = {Valverde‐Barrantes, Oscar J. and Maherali, Hafiz and Baraloto, Christopher and Blackwood, Christopher B.},
abstractNote = {Summary Changes in fine‐root morphology are typically associated with transitions from the ancestral arbuscular mycorrhizal (AM) to the alternative ectomycorrhizal (ECM) or nonmycorrhizal (NM) associations. However, the modifications in root morphology may also coincide with new modifications in leaf hydraulics and growth habit during angiosperm diversification. These hypotheses have not been evaluated concurrently, and this limits our understanding of the causes of fine‐root evolution. To explore the evolution of fine‐root systems, we assembled a 600+ species database to reconstruct historical changes in seed plants over time. We utilise ancestral reconstruction approaches together with phylogenetically informed comparative analyses to test whether changes in fine‐root traits were most strongly associated with mycorrhizal affiliation, leaf hydraulics or growth form. Our findings showed significant shifts in root diameter, specific root length and root tissue density as angiosperms diversified, largely independent from leaf changes or mycorrhizal affiliation. Growth form was the only factor associated with fine‐root traits in statistical models including mycorrhizal association and leaf venation, suggesting substantial modifications in fine‐root morphology during transitions from woody to nonwoody habits. Divergences in fine‐root systems were crucial in the evolution of seed plant lineages, with important implications for ecological processes in terrestrial ecosystems.},
doi = {10.1111/nph.16729},
journal = {New Phytologist},
number = 2,
volume = 228,
place = {United Kingdom},
year = {Mon Jul 13 00:00:00 EDT 2020},
month = {Mon Jul 13 00:00:00 EDT 2020}
}
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