Ecology of ericoid mycorrhizal fungi

Grelet, Gwen; Martino, Elena; Dickie, Ian A.; Tajuddin, Rosnida; Artz, Rebekka

doi:10.1002/9781118951446.ch22

Cited by 15 publications

(9 citation statements)

References 51 publications

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“…Interestingly, fungal representatives affiliating to Hyaloscypha bicolor were also much more common in the Rich1 site compared to other sites and appeared more common in the beginning of the growing period (after 2 months) and then again after the winter (after 12 months). H. bicolor is known to form short exploration type mycelia and associate with both ericoid and ectomycorrhizal hosts (Grelet et al ., 2016). Species of Hyaloscypha (former Meliniomyces ) have high melanin content in their cell walls, and melanized fungal necromass has been reported to decompose slowly (Fernandez et al ., 2013; Fernandez and Koide, 2014) and contribute significantly to C accumulation in soil organic matter (Clemmensen et al ., 2013).…”

Section: Discussionmentioning

confidence: 99%

Site fertility and soil water‐table level affect fungal biomass production and community composition in boreal peatland forests

Peltoniemi

Adamczyk

Fritze

et al. 2021

Environmental Microbiology

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A substantial amount of below-ground carbon (C) is suggested to be associated with fungi, which may significantly affect the soil C balance in forested ecosystems. Ergosterol from in-growth mesh bags and litterbags was used to estimate fungal biomass production and community composition in drained peatland forests with differing fertility. Extramatrical mycelia (EMM) biomass production was generally higher in the nutrient-poor site, increased with deeper water table level and decreased along the length of the recovery time. EMM biomass production was of the same magnitude as in mineral-soil forests. Saprotrophic fungal biomass production was higher in the nutrient-rich site. Both ectomycorrhizal (ECM) and saprotrophic fungal community composition changed according to site fertility and water table level. ECM fungal community composition with different exploration types may explain the differences in fungal biomass production between peatland forests. Melanin-rich Hyaloscypha may indicate decreased turnover of biomass in nutrient-rich young peatland forest. Genera Lactarius and Laccaria may be important in nutrient rich and Piloderma in the nutrient-poor conditions, respectively. Furthermore, Paxillus involutus and Cortinarius sp. may be important generalists in all sites and responsible for EMM biomass production during the first summer months. Saprotrophs showed a functionally more diverse fungal community in the nutrient-rich site.

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Section: Discussionmentioning

confidence: 99%

Site fertility and soil water‐table level affect fungal biomass production and community composition in boreal peatland forests

Peltoniemi

Adamczyk

Fritze

et al. 2021

Environmental Microbiology

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“…The analysis of differentially distributed taxa revealed several genera of ericoid mycorrhizal (EM) fungi, which are important mutualistic endosymbionts of blueberries and other plants of the Ericaceae family (Grelet et al, 2017). Ericoid mycorrhizae enhance the fitness and productivity of the Ericaceae plants and play a vital role in their adaptation to soils with low pH and slow turnover of organic matter.…”

Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Rhizosphere Microbiomes of Southern Highbush Blueberry (Vaccinium corymbosum L.), Darrow’s Blueberry (V. darrowii Camp), and Rabbiteye Blueberry (V. virgatum Aiton)

Mavrodi

Hou

et al. 2020

Front. Microbiol.

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“…Meliniomyces bicolor is a mycorrhizal fungus that associates with both ericoid and ectomycorrhizal hosts (Grelet, Martino, Dickie, Tajuddin, & Artz, ). We manipulated the level of cell wall melanization in M. bicolor by growing identical starting mycelial plugs in 125 ml flasks with different levels of submersion (50 or 100 ml) of half‐strength potato dextrose broth (PDB, Difco, BD Products, Franklin Lakes, New Jersey, USA).…”

Section: Methodsmentioning

confidence: 99%

Melanization of mycorrhizal fungal necromass structures microbial decomposer communities

Fernandez

Kennedy

2018

Journal of Ecology

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Abstract1. Mycorrhizal fungal necromass is increasingly recognized as an important contributor to soil organic carbon pools, particularly in forest ecosystems. While its decomposition rate is primarily determined by biochemical composition, how traits such as melanin content affect the structure of necromass decomposer communities remains poorly understood.2. To assess the role of biochemical traits on microbial decomposer community composition and functioning, we incubated melanized and non-melanized necromass of the mycorrhizal fungus Meliniomyces bicolor in Pinus-and Quercus-dominated forests in Minnesota, USA and then assessed the associated fungal and bacterial decomposer communities after 1, 2 and 3 months using high-throughput sequencing.3. Melanized necromass decomposed significantly slower than non-melanized necromass in both forests. The structure of the microbial decomposer communities depended significantly on necromass melanin content, although the effect was stronger for fungi than bacteria. On non-melanized necromass, fungal communities were dominated by r-selected ascomycete and mucoromycete microfungi early and then replaced by basidiomycete ectomycorrhizal fungi, while on melanized necromass these groups were co-dominant throughout the incubation. Bacterial communities were dominated by both specialist mycophageous and generalist taxa. Synthesis.Our results indicate that necromass biochemistry not only strongly affects rates of decomposition but also the structure of the associated decomposer communities. Furthermore, the observed colonization patterns suggest that fungi, and particularly ectomycorrhizal fungi, may play a more important role in necromass decomposition than previously recognized. K E Y W O R D Sbacteria, carbon cycle, decomposition, fungi, melanin, mycorrhizal fungi, necromass, nitrogen cycle

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Ecology of ericoid mycorrhizal fungi

Cited by 15 publications

References 51 publications

Site fertility and soil water‐table level affect fungal biomass production and community composition in boreal peatland forests

Site fertility and soil water‐table level affect fungal biomass production and community composition in boreal peatland forests

Comparative Analysis of Rhizosphere Microbiomes of Southern Highbush Blueberry (Vaccinium corymbosum L.), Darrow’s Blueberry (V. darrowii Camp), and Rabbiteye Blueberry (V. virgatum Aiton)

Melanization of mycorrhizal fungal necromass structures microbial decomposer communities

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