Fluxes of root-derived carbon into the nematode micro-food web of an arable soil

Pausch, Johanna; Hofmann, Sylvia; Scharroba, Anika; Kuzyakov, Yakov; Rueß, Liliane

doi:10.1016/j.fooweb.2016.05.001

Cited by 28 publications

(13 citation statements)

References 44 publications

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“…Soil community fractionation experiments [95], in which nematodes can be removed from soil communities, can help us to understand the functional consequences of changes in nematode community composition for plant health (e.g., in response to global change factors). Trophic positions of nematodes, including their effect on the rhizobiome and interactions with plants, can now be derived using stable isotope analysis [96] or pulse labelling plants with 14 CO 2 [97]. Together, these techniques will help us to elucidate the taxonomic and functional diversity of soil nematodes and their role in plant performance.…”

Section: Methodological Advances To Improve Understanding Of Plant-nematode Interactionsmentioning

confidence: 99%

Nematodes as Drivers of Plant Performance in Natural Systems

Wilschut

Geisen

2021

Trends in Plant Science

124

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This article is made publicly available in the institutional repository of Wageningen University and Research, under the terms of article 25fa of the Dutch Copyright Act, also known as the Amendment Taverne. This has been done with explicit consent by the author.Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work.This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this project research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.

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Section: Methodological Advances To Improve Understanding Of Plant-nematode Interactionsmentioning

confidence: 99%

Nematodes as Drivers of Plant Performance in Natural Systems

Wilschut

Geisen

2021

Trends in Plant Science

124

View full text Add to dashboard Cite

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“…Microfaunal food webs play critical role in soil functioning. Nematodes, the most abundant metazoan organisms in microfaunal food webs, are relevant components of belowground C cycling in spite of their low absolute biomass (Pausch et al, 2016). They occupy multiple positions in the soil food web and present high taxonomic and functional diversity (Ettema, 1998).…”

Section: Introductionmentioning

confidence: 99%

Microfaunal soil food webs in Mediterranean semi-arid agroecosystems. Does organic management improve soil health?

Sánchez‐Moreno

Cano

López-Pérez³

et al. 2018

Applied Soil Ecology

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“…The latter can give a competitive advantage to Gram-negative bacteria, as they multiply rapidly on these labile carbon resources [52]. Such nematode induced "leakage" in the rhizosphere is well known for annual and crop plants, e.g., clover, barley or maize [16,17,53]. For perennial woody plants, P. penetrans was reported to stimulate microbial growth in the rhizosphere of oak [25], predominantly due to a promotion of plant carbon flow belowground [26].…”

Section: Plant Feedersmentioning

confidence: 99%

Micro-Food Web Structure Shapes Rhizosphere Microbial Communities and Growth in Oak

et al. 2018

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The multitrophic interactions in the rhizosphere impose significant impacts on microbial community structure and function, affecting nutrient mineralisation and consequently plant performance. However, particularly for long-lived plants such as forest trees, the mechanisms by which trophic structure of the micro-food web governs rhizosphere microorganisms are still poorly understood. This study addresses the role of nematodes, as a major component of the soil micro-food web, in influencing the microbial abundance and community structure as well as tree growth. In a greenhouse experiment with Pedunculate Oak seedlings were grown in soil, where the nematode trophic structure was manipulated by altering the proportion of functional groups (i.e., bacterial, fungal, and plant feeders) in a full factorial design. The influence on the rhizosphere microbial community, the ectomycorrhizal symbiont Piloderma croceum, and oak growth, was assessed. Soil phospholipid fatty acids were employed to determine changes in the microbial communities. Increased density of singular nematode functional groups showed minor impact by increasing the biomass of single microbial groups (e.g., plant feeders that of Gram-negative bacteria), except fungal feeders, which resulted in a decline of all microorganisms in the soil. In contrast, inoculation of two or three nematode groups promoted microbial biomass and altered the community structure in favour of bacteria, thereby counteracting negative impact of single groups. These findings highlight that the collective action of trophic groups in the soil micro-food web can result in microbial community changes promoting the fitness of the tree, thereby alleviating the negative effects of individual functional groups.Diversity 2018, 10, 15 2 of 16 diversity nematodes hold a central position in the micro-food web [10,11] and participate in both bottom-up and top-down controlled webs [12]. Their multitrophic interactions in the soil micro-food web can impose various impacts on plant fitness. In resource regulated food webs nematode grazing maintains bacterial and fungal populations in a youthful state, regulates microbial composition, and enhances decomposition activity [13,14]. Moreover, the "leakage" of root cell content induced by plant feeders can increase carbon translocation into the rhizosphere, thereby indirectly stimulating microbial biomass [15][16][17]. Furthermore, nematodes recycle nutrients by excretion (e.g., ammonium) otherwise locked up in microbial biomass, making them accessible for plant up-take [18,19]. On the other side, feeding activity of fungal grazers and plant feeders can negatively affect mycorrhiza fungi, and hence hamper nutrient acquisition by trees [20,21].Insight into these relationships of trees and rhizosphere organisms is necessary for sustainable forest management [22,23]. In temperate forests, Pedunculate Oak (Quercus robur L.) is an economically important species [24], which was recently used as model to investigate rhizosphere interactions by employing nematode...

show abstract

Fluxes of root-derived carbon into the nematode micro-food web of an arable soil

Cited by 28 publications

References 44 publications

Nematodes as Drivers of Plant Performance in Natural Systems

Nematodes as Drivers of Plant Performance in Natural Systems

Microfaunal soil food webs in Mediterranean semi-arid agroecosystems. Does organic management improve soil health?

Micro-Food Web Structure Shapes Rhizosphere Microbial Communities and Growth in Oak

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