Severance of arbuscular mycorrhizal fungal mycelial networks in restoration grasslands enhances seedling biomass

Dassen, Sigrid; Putten, W.H. van der; Deyn, Gerlinde B. De

doi:10.1111/nph.17636

Cited by 6 publications

(3 citation statements)

References 69 publications

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“…Possible explanations of the less negative PSF in juveniles is that they are less affected by nutrient depletion, are less sensitive to specialized soil pathogens, or benefit more from associations with arbuscular mycorrhizal fungi due to a less developed root system (van der Heijden 2004, Aldrich‐Wolfe 2007). On the other hand, there is also evidence of negative effects of AMF colonization on seedlings growth (Dassen et al 2021). Seed germination may be also positively affected by plant growth‐promoting rhizobacteria (Kloepper et al 1991, Wu et al 2016) which may be stimulated by root exudates released by some plants (van Loon 2007, Vacheron et al 2013, Hu et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Effects of soil conditioning, root and shoot litter addition interact to determine the intensity of plant–soil feedback

Florianová

Dostálek

Münzbergová

2022

Oikos

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Plant-soil feedback (PSF) is recognized as an important mechanism shaping plant communities and determining plant abundance and coexistence. Under natural conditions, plants affect the outcome of plant-soil interactions simultaneously by conditioning the soil by living roots and by litter inputs into the soil. However, most experimental studies only focus on one of the pathways, which limits our understanding of PSF in the field.Here, we simultaneously explored the effect of soil conditioning by living roots and of root and shoot litter addition on the performance of seven Impatiens species grown in a two-phase garden experiment.Soil conditioning negatively affected plant performance, which was at least partly explained by nutrient depletion. Root litter addition affected plant performance negatively and the results suggest that biotic effects such as pathogen transmission via the root litter played a role. The effects of root litter addition were more pronounced in control soil which, contrary to the conditioned soil, supposedly did not accumulate pathogens during the conditioning phase. Shoot litter addition increased soil nutrient levels, but had no impact on plant performance. However, presence of shoot litter aggravated the negative effects of root litter, probably due to increased amounts of nutrients available for soil biota and thus their faster growth and intensified effect on the plants.Overall, our study suggests that root and shoot litter have contrasting roles in plantsoil interactions and understanding their separate and interactive effects together with effects of soil conditioning is crucial for assessing the complexity of PSF.

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Section: Discussionmentioning

confidence: 99%

Effects of soil conditioning, root and shoot litter addition interact to determine the intensity of plant–soil feedback

Florianová

Dostálek

Münzbergová

2022

Oikos

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“…These, in exchange for a number of products assimilated by photosynthesis [14], protects against pathogens [15][16][17], limits abiotic stresses [18][19][20][21][22] and restricts the heavy metals of the host species [23][24][25]. In addition, mycorrhizal fungi interconnect with the grassland species through a network of hyphae [26], thus intervening in the dynamics of the plant community [27,28]. It has been shown that the involvement of plants in a symbiotic partnership with mycorrhizal fungi can lead to the dominance of some species, as well as to the exclusion of other plants [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Fertilization Alters Mycorrhizal Colonization Strategy in the Roots of Agrostis capillaris

et al. 2022

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Long-term fertilization targets mycorrhizal fungi adapted to symbiotic exchange of nutrients, thus restricting their colonization potential and re-orienting the colonization strategies. The MycoPatt tool has a high applicability in quantifying the symbiotic process with the identification of mycorrhizal indices and projection of mycorrhizal patterns. Organic treatments increase the symbiotic process, visible in values of colonization frequency and intensity, with about 6% more than the native status of colonization. At the opposite pole, organic-mineral treatments decrease the colonization parameters by up to half of the organic treatment. All of the colonization parameters show significant correlations, except for the arbuscules/vesicle ratio (0.03). All the applied treatments, except for the organic one, record multiple root segments with a colonization degree lower than 10%. The application of treatments changes the strategy of native colonization from a transfer (40%) and storage (37%) to a predominant storage (50%) for organic treatment, and are mainly proliferative between 38–50% in mixed and mineral treatments. The high amount of mineral components increases also the presence of resistance conditions strategies. The use of mycorrhizal pattern maps, with the inclusion of colonization strategies, presents an important direction in understanding the evolution of mutual relations, and to explore in-depth the efficiency of the whole symbiotic process.

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“…Although the influence of the richness of the mycorrhizal community could not been detected statistically, the mutualistic interaction will have contributed to the relative effect of the competition between the plants . AMF mutualists can promote plant species coexistence Hart et al, 2003) but have also been shown to generate negative effects on the biomass of establishing seedlings (Dassen et al, 2021). The relative strength of these effects is governed by an interplay of several factors like the identity of the early and late arriving plants , and their AMF community composition and richness , which makes it difficult to separate these factors in my results.…”

Section: Competition For Resources Not Interaction Niche Properties D...mentioning

confidence: 93%

The interplay between host plants and priority effects in community assembly processes of arbuscular mycorrhizal fungi

Lewe¹

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Plants and arbuscular mycorrhizal fungi (AMF) form a symbiosis for mutualistic benefits. AMF rely on host plants as carbon sources, whereas the plants benefit from the development of an extensive hyphal network in the soil that delivers water and nutrients to the plant roots. The assembly of species into a community is governed by several biotic and abiotic factors and predicting the outcomes of community assembly is regarded as the holy grail of community ecology. The relative importance of the mechanisms underlying the assembly of AMF communities in plant roots is still a matter of discussion, with impacts by the host plant itself, effects exerted by the plant neighbourhood, soil conditions and dispersal processes as candidates for highly relevant determinants of the AMF assembly. To elucidate the interplay between some of these influences on the fungal assembly, and to reveal their relative importance as determinants of assembly mechanisms, I determined the generalism and specialism in the interaction of separately grown pasture plants with AMF by characterising several numeric and phylogenetic interaction properties. I also examined the plant-AMF interaction of these plants grown in a plant community, in which I experimentally manipulated their order of arrival. My objectives were: 1) to examine if and how pasture plants differ in their inherent interaction strategies with AMF; 2) to assess if the plants’ interaction strategies with AMF influence the carbon allocation to the microbial community (AMF and bacteria) as measured by their differences in biomass and community composition, and if, due to priority effects, these differences had consequences for the further development of the rhizosphere community; 3) to examine the relative effects of plant neighbours and the order of arrival on the plant-AMF interaction of plants differing in their interaction niche strategies; and 4) to evaluate the interplay between inherent interaction niche strategy, neighbour plants, and priority of arrival on the bipartite plant-AMF interaction network structure. By quantifying the plants’ niche width in their interaction with AMF and their specificity for AMF species, I revealed that the pasture plant species were characterised by distinct inherent interaction strategies, suggesting partitioning of the plant-AMF interaction traits among the members of a plant community. When these plants were grown in a plant community, they still tended to employ their inherent interaction strategy, with some exceptions. In contrast, all studied plant species showed significant changes in their AMF abundances due to the influence of neighbouring plants in comparison to their single growth. I found that while the relative impact of the neighbourhood on a plant’s AMF community assembly changed with the order of arrival of the host plant in the plant community, the direction and strength of that change was affected by the plants’ inherent interaction strategy. My results suggest that the inherent interaction strategy of an early arriving focal plant can be a determinant of the AMF assembly of the late arrivals. However, the impact of the focal plant pertained entirely to changes in AMF α- and β-diversities, whereas the topology (i.e., nestedness and modularity) of the bipartite plant-AMF interaction network remained unresponsive to these changes. My findings suggest that the combination of order of arrival and interaction strategies of the plants are relevant determinants of the AMF community assembly of the plant-AMF interaction with possible consequences for the succession of the system as well as for its stability and productivity. However, that the topology of the bipartite interaction network, which is seen as an indicator of its stability and persistence, remained mostly unchanged suggests a high robustness of the plant community against changes in the diversity of its AMF mutualists. This network consistency might, in turn, offer robustness against perturbation of the system.

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Severance of arbuscular mycorrhizal fungal mycelial networks in restoration grasslands enhances seedling biomass

Cited by 6 publications

References 69 publications

Effects of soil conditioning, root and shoot litter addition interact to determine the intensity of plant–soil feedback

Effects of soil conditioning, root and shoot litter addition interact to determine the intensity of plant–soil feedback

Long-Term Fertilization Alters Mycorrhizal Colonization Strategy in the Roots of Agrostis capillaris

The interplay between host plants and priority effects in community assembly processes of arbuscular mycorrhizal fungi

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