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Title: Ectomycorrhizal and Dark Septate Fungal Associations of Pinyon Pine Are Differentially Affected by Experimental Drought and Warming

Abstract

Changing climates can cause shifts in temperature and precipitation, resulting in warming and drought in some regions. Although each of these factors has been shown to detrimentally affect forest ecosystems worldwide, information on the impacts of the combined effects of warming and drought is lacking. Forest trees rely on mutualistic root-associated fungi that contribute significantly to plant health and protection against climate stresses. We used a six-year, ecosystem-scale temperature and precipitation manipulation experiment targeted to simulate the climate in 2100 in the Southwestern United States to quantify the effects of drought, warming and combined drought and warming on the root colonization (abundance), species composition and diversity of ectomycorrhizal fungi (EMF), and dark septate fungal endophytes in a widespread woodland tree, pinyon pine (Pinus edulis E.). Our results show that pinyon shoot growth after 6 years of these treatments was reduced more by drought than warming. The combined drought and warming treatment reduced the abundance and diversity of EMF more than either treatment alone. Individual ectomycorrhizal fungal taxa, including the drought tolerant Cenococcum geophilum, were present in all treatments but the combined drought and warming treatment. The combined drought and warming treatment also reduced the abundance of dark septate endophytes (DSE),more » but did not affect their diversity or species composition. The current year shoot growth of the trees correlated positively with ectomycorrhizal fungal diversity, highlighting the importance of diversity in mutualistic relationships to plant growth. Our results suggest that EMF may be more important than DSE to aboveground growth in P. edulis, but also more susceptible to the negative effects of combined climate stressors.« less

Authors:
 [1]; ORCiD logo [2];  [1];  [3]; ORCiD logo [2]
  1. Northern Arizona Univ., Flagstaff, AZ (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Montana State Univ., Bozeman, MT (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1688771
Report Number(s):
LA-UR-20-25014
Journal ID: ISSN 1664-462X
Grant/Contract Number:  
89233218CNA000001; ER20160373
Resource Type:
Accepted Manuscript
Journal Name:
Frontiers in Plant Science
Additional Journal Information:
Journal Volume: 11; Journal ID: ISSN 1664-462X
Publisher:
Frontiers Research Foundation
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; dark septate endophytes; ectomycorrhizal fungi; fungal diversity; root-associated fungi; tree drought response; pinyon pine; dryland ecosystems; climate change

Citation Formats

Gehring, Catherine, Sevanto, Sanna Annika, Patterson, Adair, Ulrich, Danielle E. M., and Kuske, Cheryl Rae. Ectomycorrhizal and Dark Septate Fungal Associations of Pinyon Pine Are Differentially Affected by Experimental Drought and Warming. United States: N. p., 2020. Web. https://doi.org/10.3389/fpls.2020.582574.
Gehring, Catherine, Sevanto, Sanna Annika, Patterson, Adair, Ulrich, Danielle E. M., & Kuske, Cheryl Rae. Ectomycorrhizal and Dark Septate Fungal Associations of Pinyon Pine Are Differentially Affected by Experimental Drought and Warming. United States. https://doi.org/10.3389/fpls.2020.582574
Gehring, Catherine, Sevanto, Sanna Annika, Patterson, Adair, Ulrich, Danielle E. M., and Kuske, Cheryl Rae. Tue . "Ectomycorrhizal and Dark Septate Fungal Associations of Pinyon Pine Are Differentially Affected by Experimental Drought and Warming". United States. https://doi.org/10.3389/fpls.2020.582574. https://www.osti.gov/servlets/purl/1688771.
@article{osti_1688771,
title = {Ectomycorrhizal and Dark Septate Fungal Associations of Pinyon Pine Are Differentially Affected by Experimental Drought and Warming},
author = {Gehring, Catherine and Sevanto, Sanna Annika and Patterson, Adair and Ulrich, Danielle E. M. and Kuske, Cheryl Rae},
abstractNote = {Changing climates can cause shifts in temperature and precipitation, resulting in warming and drought in some regions. Although each of these factors has been shown to detrimentally affect forest ecosystems worldwide, information on the impacts of the combined effects of warming and drought is lacking. Forest trees rely on mutualistic root-associated fungi that contribute significantly to plant health and protection against climate stresses. We used a six-year, ecosystem-scale temperature and precipitation manipulation experiment targeted to simulate the climate in 2100 in the Southwestern United States to quantify the effects of drought, warming and combined drought and warming on the root colonization (abundance), species composition and diversity of ectomycorrhizal fungi (EMF), and dark septate fungal endophytes in a widespread woodland tree, pinyon pine (Pinus edulis E.). Our results show that pinyon shoot growth after 6 years of these treatments was reduced more by drought than warming. The combined drought and warming treatment reduced the abundance and diversity of EMF more than either treatment alone. Individual ectomycorrhizal fungal taxa, including the drought tolerant Cenococcum geophilum, were present in all treatments but the combined drought and warming treatment. The combined drought and warming treatment also reduced the abundance of dark septate endophytes (DSE), but did not affect their diversity or species composition. The current year shoot growth of the trees correlated positively with ectomycorrhizal fungal diversity, highlighting the importance of diversity in mutualistic relationships to plant growth. Our results suggest that EMF may be more important than DSE to aboveground growth in P. edulis, but also more susceptible to the negative effects of combined climate stressors.},
doi = {10.3389/fpls.2020.582574},
journal = {Frontiers in Plant Science},
number = ,
volume = 11,
place = {United States},
year = {2020},
month = {10}
}

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