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Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales.

Publication ,  Journal Article
Korotkin, HB; Swenie, RA; Miettinen, O; Budke, JM; Chen, K-H; Lutzoni, F; Smith, ME; Matheny, PB
Published in: American journal of botany
November 2018

The Hymenochaetales are dominated by lignicolous saprotrophic fungi involved in wood decay. However, the group also includes bryophilous and terricolous taxa, but their modes of nutrition are not clear. Here, we investigate patterns of carbon and nitrogen utilization in numerous non-lignicolous Hymenochaetales and provide a phylogenetic context in which these non-canonical ecological guilds arose.We combined stable isotope analyses of δ13 C and δ15 N and phylogenetic analyses to explore assignment and evolution of nutritional modes. Clustering procedures and statistical tests were performed to assign trophic modes to Hymenochaetales and test for differences between varying ecologies. Genomes of Hymenochaetales were mined for presence of enzymes involved in plant cell wall and lignin degradation and sucrolytic activity.Three different trophic clusters were detected - biotrophic, saprotrophic, and a second biotrophic cluster including many bryophilous Hymenochaetales and mosses. Non-lignicolous Hymenochaetales are generally biotrophic. All lignicolous Hymenochaetales clustered as saprotrophic and most terricolous Hymenochaetales clustered as ectomycorrhizal. Overall, at least 15 species of Hymenochaetales are inferred as biotrophic. Bryophilous species of Rickenella can degrade plant cell walls and lignin, and cleave sucrose to glucose consistent with a parasitic or endophytic life style.Most non-lignicolous Hymenochaetales are biotrophic. Stable isotope values of many bryophilous Hymenochaetales cluster as ectomycorrhizal or in a biotrophic cluster indicative of parasitism or an endophytic life style. Overall, trophic mode diversity in the Hymenochaetales is greater than anticipated, and non-lignicolous ecological traits and biotrophic modes of nutrition are evolutionarily derived features.

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Published In

American journal of botany

DOI

EISSN

1537-2197

ISSN

0002-9122

Publication Date

November 2018

Volume

105

Issue

11

Start / End Page

1869 / 1887

Related Subject Headings

  • Phylogeny
  • Oxygenases
  • Nitrogen Isotopes
  • Genome, Fungal
  • Food Chain
  • Evolutionary Biology
  • Cluster Analysis
  • Carbon Isotopes
  • Basidiomycota
  • 3108 Plant biology
 

Citation

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Korotkin, H. B., Swenie, R. A., Miettinen, O., Budke, J. M., Chen, K.-H., Lutzoni, F., … Matheny, P. B. (2018). Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales. American Journal of Botany, 105(11), 1869–1887. https://doi.org/10.1002/ajb2.1183
Korotkin, Hailee B., Rachel A. Swenie, Otto Miettinen, Jessica M. Budke, Ko-Hsuan Chen, François Lutzoni, Matthew E. Smith, and P Brandon Matheny. “Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales.American Journal of Botany 105, no. 11 (November 2018): 1869–87. https://doi.org/10.1002/ajb2.1183.
Korotkin HB, Swenie RA, Miettinen O, Budke JM, Chen K-H, Lutzoni F, et al. Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales. American journal of botany. 2018 Nov;105(11):1869–87.
Korotkin, Hailee B., et al. “Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales.American Journal of Botany, vol. 105, no. 11, Nov. 2018, pp. 1869–87. Epmc, doi:10.1002/ajb2.1183.
Korotkin HB, Swenie RA, Miettinen O, Budke JM, Chen K-H, Lutzoni F, Smith ME, Matheny PB. Stable isotope analyses reveal previously unknown trophic mode diversity in the Hymenochaetales. American journal of botany. 2018 Nov;105(11):1869–1887.

Published In

American journal of botany

DOI

EISSN

1537-2197

ISSN

0002-9122

Publication Date

November 2018

Volume

105

Issue

11

Start / End Page

1869 / 1887

Related Subject Headings

  • Phylogeny
  • Oxygenases
  • Nitrogen Isotopes
  • Genome, Fungal
  • Food Chain
  • Evolutionary Biology
  • Cluster Analysis
  • Carbon Isotopes
  • Basidiomycota
  • 3108 Plant biology