Mycena species can be opportunist-generalist plant root invaders
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Mycena species can be opportunist-generalist plant root invaders. / Harder, Christoffer Bugge; Hesling, Emily; Botnen, Synnøve S.; Lorberau, Kelsey E.; Dima, Bálint; von Bonsdorff-Salminen, Tea; Niskanen, Tuula; Jarvis, Susan G.; Ouimette, Andrew; Hester, Alison; Hobbie, Erik A.; Taylor, Andy F.S.; Kauserud, Håvard.
In: Environmental Microbiology, Vol. 25, No. 10, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Mycena species can be opportunist-generalist plant root invaders
AU - Harder, Christoffer Bugge
AU - Hesling, Emily
AU - Botnen, Synnøve S.
AU - Lorberau, Kelsey E.
AU - Dima, Bálint
AU - von Bonsdorff-Salminen, Tea
AU - Niskanen, Tuula
AU - Jarvis, Susan G.
AU - Ouimette, Andrew
AU - Hester, Alison
AU - Hobbie, Erik A.
AU - Taylor, Andy F.S.
AU - Kauserud, Håvard
N1 - Publisher Copyright: © 2023 The Authors. Environmental Microbiology published by Applied Microbiology International and John Wiley & Sons Ltd.
PY - 2023
Y1 - 2023
N2 - Traditional strict separation of fungi into ecological niches as mutualist, parasite or saprotroph is increasingly called into question. Sequences of assumed saprotrophs have been amplified from plant root interiors, and several saprotrophic genera can invade and interact with host plants in laboratory growth experiments. However, it is uncertain if root invasion by saprotrophic fungi is a widespread phenomenon and if laboratory interactions mirror field conditions. Here, we focused on the widespread and speciose saprotrophic genus Mycena and performed (1) a systematic survey of their occurrences (in ITS1/ITS2 datasets) in mycorrhizal roots of 10 plant species, and (2) an analysis of natural abundances of 13C/15N stable isotope signatures of Mycena basidiocarps from five field locations to examine their trophic status. We found that Mycena was the only saprotrophic genus consistently found in 9 out of 10 plant host roots, with no indication that the host roots were senescent or otherwise vulnerable. Furthermore, Mycena basidiocarps displayed isotopic signatures consistent with published 13C/15N profiles of both saprotrophic and mutualistic lifestyles, supporting earlier laboratory-based studies. We argue that Mycena are widespread latent invaders of healthy plant roots and that Mycena species may form a spectrum of interactions besides saprotrophy also in the field.
AB - Traditional strict separation of fungi into ecological niches as mutualist, parasite or saprotroph is increasingly called into question. Sequences of assumed saprotrophs have been amplified from plant root interiors, and several saprotrophic genera can invade and interact with host plants in laboratory growth experiments. However, it is uncertain if root invasion by saprotrophic fungi is a widespread phenomenon and if laboratory interactions mirror field conditions. Here, we focused on the widespread and speciose saprotrophic genus Mycena and performed (1) a systematic survey of their occurrences (in ITS1/ITS2 datasets) in mycorrhizal roots of 10 plant species, and (2) an analysis of natural abundances of 13C/15N stable isotope signatures of Mycena basidiocarps from five field locations to examine their trophic status. We found that Mycena was the only saprotrophic genus consistently found in 9 out of 10 plant host roots, with no indication that the host roots were senescent or otherwise vulnerable. Furthermore, Mycena basidiocarps displayed isotopic signatures consistent with published 13C/15N profiles of both saprotrophic and mutualistic lifestyles, supporting earlier laboratory-based studies. We argue that Mycena are widespread latent invaders of healthy plant roots and that Mycena species may form a spectrum of interactions besides saprotrophy also in the field.
U2 - 10.1111/1462-2920.16398
DO - 10.1111/1462-2920.16398
M3 - Journal article
C2 - 37188366
AN - SCOPUS:85159273534
VL - 25
JO - Environmental Microbiology
JF - Environmental Microbiology
SN - 1462-2912
IS - 10
ER -
ID: 352939336