Testing the trade‐balance model: resource stoichiometry does not sufficiently explain <scp>AM</scp> effects

Corrêa, Ana; Ferrol, Nuria; Cruz, Cristina

doi:10.1111/nph.19432

Cited by 5 publications

(2 citation statements)

References 95 publications

(153 reference statements)

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“…1523Bogar ( -1528 suggests that market exchange theories should be re-examined, particularly in predicting short-term outcomes. This is supported by the study by Corrêa et al (2024Corrêa et al ( , in this issue pp. 1561Corrêa et al ( -1575, who did not find support for market theories in regulating arbuscular mycorrhizal interactions with rice plants, suggesting that nutrient exchange is driven by a surplus of resources.…”

Section: Nutrient Cyclingsupporting

confidence: 76%

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Mycorrhizal research now: from the micro‐ to the macro‐scale

Martin,

Öpik,

Dickie

2024

New Phytologist

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Mycorrhizal symbioses are complex relationships between plants and fungi that significantly affect ecosystem dynamics and functions across terrestrial environments. These symbiotic interactions, which involve a diverse range of fungal lineages, including Mucoromycotina, Glomeromycotina, Ascomycota, and Basidiomycota, as well as various plant hosts, are critical for nutrient cycling, carbon sequestration, plant growth, and resilience of both partners to environmental stressors. Recent advances in molecular biology, genetics, and ecosystem sciences have enhanced our understanding of mycorrhizal symbioses and illuminated the mechanisms that govern these intricate interactions and their ecological implications.In this New Phytologist Special Issue on 'Mycorrhizal research now: from the micro-to the macro-scale', we bring together a collection of studies, which examine various types of mycorrhizal symbioses, such as arbuscular mycorrhizal, orchid mycorrhizal, ericoid mycorrhizal, and ectomycorrhizal associations. These studies explored the molecular, physiological, and ecological dimensions of mycorrhizal interactions, uncovering the complex conversations between plants and fungi and illuminating their broader ecological implications. By integrating molecular, physiological, and ecological perspectives, this collection endeavors to untangle the multifaceted interactions between plants and fungi and their cascading effects on terrestrial ecosystems. Through distilling the key insights from these diverse studies, our goal is to identify emerging themes and future directions for mycorrhizal research.

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Section: Nutrient Cyclingsupporting

confidence: 76%

“…This is supported by the study by Corrêa et al . (2024, in this issue pp. 1561–1575), who did not find support for market theories in regulating arbuscular mycorrhizal interactions with rice plants, suggesting that nutrient exchange is driven by a surplus of resources.…”

Section: Nutrient Cyclingmentioning

confidence: 95%

Mycorrhizal research now: from the micro‐ to the macro‐scale

Martin,

Öpik,

Dickie

2024

New Phytologist

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Common soil history is more important than plant history for arbuscular mycorrhizal community assembly in an experimental grassland diversity gradient

Albracht,

Solbach,

Hennecke

et al. 2024

Biol Fertil Soils

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The relationship between biodiversity and ecosystem functioning strengthens with ecosystem age. However, the interplay between the plant diversity - ecosystem functioning relationship and Glomeromycotinian arbuscular mycorrhizal fungi (AMF) community assembly has not yet been scrutinized in this context, despite AMF’s role in plant survival and niche exploration. We study the development of AMF communities by disentangling soil- and plant-driven effects from calendar year effects. Within a long-term grassland biodiversity experiment, the pre-existing plant communities of varying plant diversity were re-established as split plots with combinations of common plant and soil histories: split plots with neither common plant nor soil history, with only soil but no plant history, and with both common plant and soil history. We found that bulk soil AMF communities were primarily shaped by common soil history, and additional common plant history had little effect. Further, the steepness of AMF diversity and plant diversity relationship did not strengthen over time, but AMF community evenness increased with common history. Specialisation of AMF towards plant species was low throughout, giving no indication of AMF communities specialising or diversifying over time. The potential of bulk soil AMF as mediators of variation in plant and microbial biomass over time and hence as drivers of biodiversity and ecosystem relationships was low. Our results suggest that soil processes may be key for the build-up of plant community-specific mycorrhizal communities with likely feedback effects on ecosystem productivity, but the plant-available mycorrhizal pool in bulk soil itself does not explain the strengthening of biodiversity and ecosystem relationships over time.

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The functionality of arbuscular mycorrhizal networks across scales of experimental complexity and ecological relevance

Magkourilou,

Bell,

Daniell

et al. 2024

Functional Ecology

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One of the most prevalent symbioses on Earth is that formed between the majority of land plants and arbuscular mycorrhizal (AM) fungi. Through these intimate associations, AM fungi transfer soil nutrients to their plant hosts in exchange for photosynthetically fixed carbon resources. It has been hypothesised that this nutritional mutualism is evolutionarily stable because both partners are in control of the exchange of resources and can discriminate between partners according to whichever offers the highest returns. However, in nature, plant–AM symbioses are exposed to a wealth of additional biotic and abiotic interactions which can affect the regulation of carbon‐for‐nutrient exchange between symbionts. Moreover, the extraradical hyphae of AM fungi make up underground networks that may be interactive or physically connected, known as common mycorrhizal networks (CMNs). These can link neighbouring plants, potentially further influencing resource distribution across the network. How these layers of complexity interact to influence resource regulation and allocation between plants and AM fungi is not often considered by experimental designs. Here, we review resource allocation in AM symbioses, scaling up from evidence from reductionist experimental systems using axenic root organ cultures to complex systems incorporating multiple neighbouring plants dealing with other, co‐occurring symbionts. As experimental designs increase in scale and ecologically relevant complexity, the carbon‐for‐nutrient exchange between plants and their AM symbionts is increasingly subject to disruption associated with the wider ecological context, such as the intricacies of the plant‐fungal interactions in a CMN or the presence of co‐occurring organisms. Read the free Plain Language Summary for this article on the Journal blog.

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Testing the trade‐balance model: resource stoichiometry does not sufficiently explain AM effects

Cited by 5 publications

References 95 publications

Mycorrhizal research now: from the micro‐ to the macro‐scale

Mycorrhizal research now: from the micro‐ to the macro‐scale

Common soil history is more important than plant history for arbuscular mycorrhizal community assembly in an experimental grassland diversity gradient

The functionality of arbuscular mycorrhizal networks across scales of experimental complexity and ecological relevance

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