A facultative ectomycorrhizal association is triggered by organic nitrogen

Peng, Long; Zhang, Yan; Druzhinina, Irina S.; Kubicek, Christian P.; Wang, Yuchen; Zhang, Zhu; Zhang, Yuwei; Wang, Kexuan; Liu, Zhuo; Zhang, Xiaoguo; Martin, Francis; Youxiang, Zhuang

doi:10.1016/j.cub.2022.10.054

Cited by 10 publications

(3 citation statements)

References 94 publications

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“…Therefore, soils with high nitrogen and phosphorus availability are more conducive to colonization by arbuscular mycorrhizal fungi. Given that ectomycorrhizal fungi incur a considerable carbon cost from cooperation, host plants in high nutrient availability environments often reduce their symbiosis with these fungi (Guo et al, 2021;Nilsson et al, 2005;Peng et al, 2022). Ectomycorrhizal fungi are thus more abundant in nutrient-deficient environments than in nutrient-rich environments (Bai et al, 2019), and this finding is consistent with those of our study.…”

Section: Relationships Between Soil Chemical Properties Fungal Commun...supporting

confidence: 91%

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

Geng

Zuo

Meng

et al. 2023

Preprint

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Soil fungal community plays an important role in forest ecosystems, and forest secondary succession is a crucial driver of soil fungal community. However, the driving factors of fungal community and function during temperate forest succession and their potential impact on succession processes are poorly understood. In this study, we investigated the dynamics of the soil fungal community in three temperate forest secondary successional stages (shrublands, coniferous forests, and deciduous broadleaf forests) using high-throughput DNA sequencing coupled with functional prediction via the FUNGuild database. We found that fungal community richness, α-diversity, and evenness decreased significantly during the succession process. Soil available phosphorus and nitrate nitrogen decreased significantly after initial succession occurred, and redundancy analysis showed that both were significant predictors of soil fungal community structure. Among functional groups, fungal saprotrophs as well as pathotrophs represented by plant pathogens were significantly enriched in the early-successional stage, while fungal symbiotrophs represented by ectomycorrhiza were significantly increased in the late-successional stage. The abundance of both saprotroph and pathotroph fungal guilds was positively correlated with soil nitrate nitrogen and available phosphorus content. Ectomycorrhizal fungi were negatively correlated with nitrate nitrogen and available phosphorus content and positively correlated with ammonium nitrogen content. These results indicated that the dynamics of fungal community and function reflected the changes in nitrogen and phosphorus availability caused by the secondary succession of temperate forests. The fungal plant pathogen accumulated in the early-successional stage and ectomycorrhizal fungi accumulated in the late-successional stage may have a potential role in promoting forest succession. These findings contribute to a better understanding of the response of soil fungal communities to the secondary forest succession process and highlight the importance of fungal communities during temperate forest succession.

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Section: Relationships Between Soil Chemical Properties Fungal Commun...supporting

confidence: 91%

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

Geng

Zuo

Meng

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…To test our hypothesis that Mycena (or other saprotrophic) root infections result from opportunistic invasion under disturbance-related circumstances, future targeted metabarcoding root studies should directly analyse roots of multiple host species of different ages and disturbance levels in the field to identify particular factors that may affect root invasion. Besides disturbance, differences in nitrogen availability have also been shown to influence fungal nutrition facultatively (Peng et al, 2022), and nutrient variability in soil and its role in fungal nutritional mode shifts should certainly also be investigated further. Annotation databases should be continuously updated to reflect our best taxonomic knowledge, and further efforts should be undertaken to identify fungal OTUs or ASVs beyond the genus level, which may require more attention to detail than relying on SINTAX/RDP classification based on even the best possible databases.…”

Section: Need For More Directly Targeted Studies On Saprotrophic Root...mentioning

confidence: 99%

Mycenaspecies can be opportunist‐generalist plant root invaders

Harder

Hesling

Botnen

et al. 2023

Environmental Microbiology

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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.

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“…Therefore, soils with high nitrogen and phosphorus availability are more conducive to colonization by arbuscular mycorrhizal fungi. Given that ectomycorrhizal fungi incur a considerable carbon cost from cooperation, host plants in high nutrient availability environments often reduce their symbiosis with these fungi (Guo et al, 2021 ; Nilsson et al, 2005 ; Peng et al, 2022 ). Ectomycorrhizal fungi are thus more abundant in nutrient‐deficient than in nutrient‐rich environments (Bai et al, 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

Geng,

Zuo,

Meng

et al. 2023

Ecology and Evolution

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The soil fungal community plays an important role in forest ecosystems and is crucially influenced by forest secondary succession. However, the driving factors of fungal community and function during temperate forest succession and their potential impact on succession processes remain poorly understood. In this study, we investigated the dynamics of the soil fungal community in three temperate forest secondary successional stages (shrublands, coniferous forests, and deciduous broad‐leaved forests) using high‐throughput DNA sequencing coupled with functional prediction via the FUNGuild database. We found that fungal community richness, α‐diversity, and evenness decreased significantly during the succession process. Soil available phosphorus and nitrate nitrogen decreased significantly after initial succession occurred, and redundancy analysis showed that both were significant predictors of soil fungal community structure. Among functional groups, fungal saprotrophs and pathotrophs represented by plant pathogens were significantly enriched in the early‐successional stage, while fungal symbiotrophs represented by ectomycorrhiza were significantly increased in the late‐successional stage. The abundance of both saprotroph and pathotroph fungal guilds was positively correlated with soil nitrate nitrogen and available phosphorus content. Ectomycorrhizal fungi were negatively correlated with nitrate nitrogen and available phosphorus content and positively correlated with ammonium nitrogen content. These results indicate that the dynamics of fungal community and function reflected the changes in nitrogen and phosphorus availability caused by the secondary succession in temperate forests. The fungal plant pathogen accumulated in the early‐successional stage and ectomycorrhizal fungi accumulated in the late‐successional stage may have a potential role in promoting forest succession. These findings contribute to a better understanding of the response of soil fungal communities to secondary forest succession and highlight the importance of fungal communities during the successional process.

show abstract

A facultative ectomycorrhizal association is triggered by organic nitrogen

Cited by 10 publications

References 94 publications

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

Mycenaspecies can be opportunist‐generalist plant root invaders

Changes in nitrogen and phosphorus availability driven by secondary succession in temperate forests shape soil fungal communities and function

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