Shifts in rhizosphere fungal community during secondary succession following abandonment from agriculture

Hannula, S. Emilia; Morriën, Elly; Hollander, Mattias de; Putten, Wim H. van der; Veen, Johannes A. van; Boer, Wietse de

doi:10.1038/ismej.2017.90

Cited by 184 publications

(158 citation statements)

References 39 publications

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“…Bacteria and fungi, two major microbial communities, are vastly different in regard to their morphological traits, growth rates, environmental sensitivities and substrate utilizations (Hannula et al ., ). Numerous studies on soil ecosystems have demonstrated that both bacterial and fungal communities have responded to ecological mechanisms that drive compositional variations (Chen et al ., ; Fan et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Juan

Wang

et al. 2019

Environmental Microbiology

135

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Summary Despite the essential functions of sedimentary bacterial and fungal communities in biogeochemical cycling, little is known about their biogeographic patterns and driving processes in large rivers. Here we investigated the biogeographic assemblies and co‐occurrence patterns of sedimentary bacterial and fungal communities in the Jinsha River, one of the largest rivers in southwestern China. The mainstream of river was divided into upstream, midstream and downstream. The results showed that both bacterial and fungal communities differed significantly among three sections. For both communities, their composition variations in all sites or each river section were controlled by the combination of dispersal limitation and environmental selection, and dispersal limitation was the dominant factor. Compared with bacteria, fungi had stronger dispersal limitation. Co‐occurrence network analyses revealed higher network connectivity but a lower proportion of positive interaction in the bacterial than fungal network at all sites. In particular, the keystone species belonging to bacterial phyla Proteobacteria and Firmicutes and fungal phyla Ascomycota and Chytridiomycota may play critical roles in maintaining community function. Together, these observations indicate that fungi have a stronger dispersal limitation influence and less network connectivity than bacteria, implying different community assembly mechanisms and ecological functions between bacteria and fungi in large rivers.

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Section: Introductionmentioning

confidence: 99%

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Juan

Wang

et al. 2019

Environmental Microbiology

135

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“…Reduced growth (Klironomos 2002) OTUs remain unidentified at the species level (Buée et al 2014;Hannula et al 2017;Mommer et al 2018;Wehner et al 2014). This suggests that there is a large gap between our ability to detect these fungi and our knowledge regarding their identity, let alone their biological functions.…”

Section: Agalinis Gattingeri Aletris Farinosa Gentiana Alba Liatris Smentioning

confidence: 99%

“…In the last decade, next-generation sequencing (NGS) techniques have allowed us to improve our knowledge of soil and root-associated fungal biodiversity in natural ecosystems (Hannula et al 2017;Jumpponen et al 2010;Mommer et al 2018;Wehner et al 2014). Such sequencing techniques provide information about the community composition of fungal operational taxonomic units (OTU) in plant roots, rhizosphere or bulk soil.…”

Section: Soil-borne Pathogenic Fungi In Species-rich Grasslandsmentioning

confidence: 99%

“…Therefore, although NGS has detected well-known agricultural soil-borne fungal pathogens in natural, species-rich grasslands (Hannula et al 2017;Mommer et al 2018), we have to be careful in predicting the ecological fungal guild (Nguyen et al 2016;Tedersoo 2014) in natural ecosystems. Accordingly, if we want to understand which fungi are actually acting as pathogens in natural grasslands, considerably more studies are required in which fungi are isolated, taxonomically characterized and tested for pathogenicity on the plant species present in the respective natural plant community, under various (a) biotic conditions (e.g.…”

Section: Agalinis Gattingeri Aletris Farinosa Gentiana Alba Liatris Smentioning

confidence: 99%

“…Recently, ecologists have embraced NGS techniques in order to describe overall microbial diversity and community assembly in ecosystems (Dassen et al 2017;Hannula et al 2017;Mommer et al 2018;Prober et al 2015;Wehner et al 2014). However, this descriptive step alone will not reveal mechanisms of interaction.…”

Section: Indirect Neighbour Effects Via the Root Microbiomementioning

confidence: 99%

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Linking ecology and plant pathology to unravel the importance of soil-borne fungal pathogens in species-rich grasslands

et al. 2018

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Soil-borne fungal diseases are a major problem in agriculture. A century ago, the Dutch plant pathologist Johanna Westerdijk recognized the importance of linking fungal biology with ecology to understand plant disease dynamics. To explore new ways to manage soil-borne fungal disease in agriculture by 'learning from nature', we follow in her footsteps: we link below ground plant-fungal pathogen interactions to ecological settings, i.e. natural grasslands. Ecological research hypothesised that the build-up of 'enemies' is reduced in species-rich vegetation compared to monocultures. To understand how plant diversity can suppress soilborne fungal pathogens, we first need to identify fungal actors in species-rich grasslands. Next-generation sequencing revealed a first glimpse of the potential fungal actors, but their ecological functions often remain elusive. Databases are becoming available to predict the ecological fungal guild, but classic phytopathology studies that isolate and characterize -taxonomically and functionally -, remain essential. Secondly, we need to set-up experiments that reveal ecological mechanisms underlying the complex below ground interactions between plant diversity and fungal pathogens. Several studies suggested that disease incidence of (hostspecific) pathogens is related to abundance of the host plant species. However, recent studies suggest that next to host species density, presence of heterospecific species additionally affects disease dynamics. We explore the direct and indirect ways of these neighboring plants diluting pathogen pressure. We argue that combining the expertise of plant pathologists and ecologists will improve our understanding of belowground plant-fungal pathogen interactions in natural grasslands and contribute to the design of sustainable and productive intercropping strategies in agriculture.

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Effect of plant root symbionts on performance of native woody species in competition with an invasive grass in multispecies microcosms

Birnbaum

Morald

Tibbett

et al. 2018

Ecology and Evolution

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The majority of terrestrial plants form mutualistic associations with arbuscular mycorrhizal fungi (AMF) and rhizobia (i.e., nitrogen‐fixing bacteria). Understanding these associations has important implications for ecological theory and for restoration practice. Here, we tested whether the presence of AMF and rhizobia influences the performance of native woody plants invaded by a non‐native grass in experimental microcosms. We planted eight plant species (i.e., Acacia acuminata, A. microbotrya, Eucalyptus loxophleba subsp. loxophleba, E. astringens, Calothamnus quadrifidus, Callistemon phoeniceus, Hakea lissocarpha and H. prostrata) in microcosms of field‐conditioned soil with and without addition of AMF and rhizobia in a fully factorial experimental design. After seedling establishment, we seeded half the microcosms with an invasive grass Bromus diandrus. We measured shoot and root biomass of native plants and Bromus, and on roots, the percentage colonization by AMF, number of rhizobia‐forming nodules and number of proteaceous root clusters. We found no effect of plant root symbionts or Bromus addition on performance of myrtaceous, and as predicted, proteaceous species as they rely little or not at all on AMF and rhizobia. Soil treatments with AMF and rhizobia had a strong positive effect (i.e., larger biomass) on native legumes (A. microbotrya and A. acuminata). However, the beneficial effect of root symbionts on legumes became negative (i.e., lower biomass and less nodules) if Bromus was present, especially for one legume, i.e., A. acuminata, suggesting a disruptive effect of the invader on the mutualism. We also found a stimulating effect of Bromus on root nodule production in A. microbotrya and AMF colonization in A. acuminata which could be indicative of legumes’ increased resource acquisition requirement, i.e., for nitrogen and phosphorus, respectively, in response to the Bromus addition. We have demonstrated the importance of measuring belowground effects because the aboveground effects gave limited indication of the effects occurring belowground.

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Shifts in rhizosphere fungal community during secondary succession following abandonment from agriculture

Cited by 184 publications

References 39 publications

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Fungal community demonstrates stronger dispersal limitation and less network connectivity than bacterial community in sediments along a large river

Linking ecology and plant pathology to unravel the importance of soil-borne fungal pathogens in species-rich grasslands

Effect of plant root symbionts on performance of native woody species in competition with an invasive grass in multispecies microcosms

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