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Title: A worldview of root traits: the influence of ancestry, growth form, climate and mycorrhizal association on the functional trait variation of fine‐root tissues in seed plants

Journal Article · · New Phytologist
DOI:https://doi.org/10.1111/nph.14571· OSTI ID:1373826
 [1];  [2];  [2];  [3]
  1. International Center of Tropical Botany Florida International University Miami FL 33199 USA, Department of Biological Sciences Kent State University Kent OH 44242 USA
  2. Centre d'Ecologie Fonctionnelle et Evolutive UMR 5175 (CNRS – Université de Montpellier – Université Paul‐Valéry Montpellier – EPHE) Montpellier 34293 France
  3. Department of Biological Sciences Kent State University Kent OH 44242 USA

Summary Fine‐root traits play key roles in ecosystem processes, but the drivers of fine‐root trait diversity remain poorly understood. The plant economic spectrum ( PES ) hypothesis predicts that leaf and root traits evolved in coordination. Mycorrhizal association type, plant growth form and climate may also affect root traits. However, the extent to which these controls are confounded with phylogenetic structuring remains unclear. Here we compiled information about root and leaf traits for > 600 species. Using phylogenetic relatedness, climatic ranges, growth form and mycorrhizal associations, we quantified the importance of these factors in the global distribution of fine‐root traits. Phylogenetic structuring accounts for most of the variation for all traits excepting root tissue density, with root diameter and nitrogen concentration showing the strongest phylogenetic signal and specific root length showing intermediate values. Climate was the second most important factor, whereas mycorrhizal type had little effect. Substantial trait coordination occurred between leaves and roots, but the strength varied between growth forms and clades. Our analyses provide evidence that the integration of roots and leaves in the PES requires better accounting of the variation in traits across phylogenetic clades. Inclusion of phylogenetic information provides a powerful framework for predictions of belowground functional traits at global scales.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0004335; SC0004335
OSTI ID:
1373826
Journal Information:
New Phytologist, Journal Name: New Phytologist Vol. 215 Journal Issue: 4; ISSN 0028-646X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 180 works
Citation information provided by
Web of Science

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