Relationship between soil nutrients and mycorrhizal associations of two<i>Bipinnula</i>species (Orchidaceae) from central Chile

Mujica, María Isabel; Saez, Norman; Cisternas, Marco; Manzano, Marlene; Armestó, Juan J.; Pérez, Fernánda

doi:10.1093/aob/mcw082

Cited by 43 publications

(34 citation statements)

References 57 publications

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“…In the present study, plants from soils with higher P content had lower levels or even absence of mycorrhizal fungi. However, Mujica et al (2016) found that mycorrhizal associations are favoured by higher soil nutrient availability and suggested that orchid species in nutrient-poor soils may exhibit generalist associations. In our study mycorrhizal association increased in comparatively low P which agrees with the above finding.…”

Section: Discussionmentioning

confidence: 99%

Diversity of root-associated culturable fungi ofCephalanthera rubra(Orchidaceae) in relation to soil characteristics

Bell

Yokoya

Kendon

et al. 2020

PeerJ

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Cephalanthera rubra (L.) Rich., Red Helleborine, is a widespread orchid in Europe but known only from three very small populations in England. These populations are in decline with no natural seed setting for more than a decade. The species may become extinct in the UK soon unless viable strategies are in place for ex situ conservation, especially the use of symbiotic propagation. Because of the fragile nature of the populations in England mycorrhizal fungal diversity study is not feasible. Therefore, to understand the factors needed for healthy Red Helleborine populations, soil characteristics and diversity of culturable root-derived fungi of the populations from a small area in the Loire Valley in France were studied. The main objectives of the study were: (1) Which culturable mycorrhizal fungi associated with C. rubra roots and (2) To what extent is variation in fungal communities related to variation in soil characteristics? Here, we report a significant difference in diversity of culturable mycorrhizal and non-mycorrhizal fungi depending on soil pH and phosphorus content. Mycorrhizal associations were favoured by plants in locations with low soil nutrient availability and comparatively higher pH. Our study shows that mycorrhizal fungi, both ecto and endo, can be cultured from roots of plants at different maturity stages.

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Section: Discussionmentioning

confidence: 99%

Diversity of root-associated culturable fungi ofCephalanthera rubra(Orchidaceae) in relation to soil characteristics

Bell

Yokoya

Kendon

et al. 2020

PeerJ

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“…Taken together, this evidence suggests that OMF species differ in ability to support orchids among habitats and climatic conditions (McCormick et al ., ; Kohler et al ., ; Fochi et al ., ; Mujica et al ., ). Genotypic and epigenetic differences among strains of OMFs may also affect their ability to support orchids.…”

Section: Orchid Mycorrhizal Fungus Identity and Orchid Distribution Amentioning

confidence: 97%

“…Similarly, Mujica et al . () found that two species of Bipinnula associated with different OMF taxa and different diversities of OMFs as a function of soil nutrients. Weedy orchids that associated with a wide range of fungi also associated with different fungi among habitats (Bonnardeaux et al ., ).…”

Section: Orchid Mycorrhizal Fungus Identity and Orchid Distribution Amentioning

confidence: 98%

“…Logically, ectomycorrhizal fungi would be far less beneficial, as well as less abundant, in an environment without ectomycorrhizal hosts. Few studies have examined whether the OMFs used by orchids differ among habitats (but see Bonnardeaux et al, 2007;Bunch et al, 2013;Mujica et al, 2016), and even less is known about whether their ability to support orchids differs as a function of edaphic or climatic conditions. Fungal communities are well known to differ among habitats and to be patchily distributed (e.g.…”

Section: Reviewmentioning

confidence: 99%

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Mycorrhizal fungi affect orchid distribution and population dynamics

2018

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Symbioses are ubiquitous in nature and influence individual plants and populations. Orchids have life history stages that depend fully or partially on fungi for carbon and other essential resources. As a result, orchid populations depend on the distribution of orchid mycorrhizal fungi (OMFs). We focused on evidence that local-scale distribution and population dynamics of orchids can be limited by the patchy distribution and abundance of OMFs, after an update of an earlier review confirmed that orchids are rarely limited by OMF distribution at geographic scales. Recent evidence points to a relationship between OMF abundance and orchid density and dormancy, which results in apparent density differences. Orchids were more abundant, less likely to enter dormancy, and more likely to re-emerge when OMF were abundant. We highlight the need for additional studies on OMF quantity, more emphasis on tropical species, and development and application of next-generation sequencing techniques to quantify OMF abundance in substrates and determine their function in association with orchids. Research is also needed to distinguish between OMFs and endophytic fungi and to determine the function of nonmycorrhizal endophytes in orchid roots. These studies will be especially important if we are to link orchids and OMFs in efforts to inform conservation.

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“…In nature, niche partitioning is an important process that allows co-existence of species with similar resource requirements (Schoener, 1974) such as soil fungal communities (Peay et al, 2008). In accordance with the expectation that closely related species have separate niches in at least one dimension, vertical separation has been demonstrated for sister species of soil fungi as a result of competitive avoidance (Mujica et al, 2016). In the current study we use niche separation as a dimension for ecological species recognition.…”

Section: Richness Estimates Based On Clustering At 985% Of Environmementioning

confidence: 88%

Peeking into the black box – integrated taxonomy of Archaeorhizomycetes

Khan

Kluting

Tångrot

et al. 2020

Preprint

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Abstract Due to their submerged and cryptic lifestyle the vast majority of fungal species are difficult to observe and describe morphologically and many remains known to science only from sequences detected in environmental samples. The lack of rules to delimit and name most fungal species is a staggering limitation to communication and interpretation of ecology and evolution in kingdom Fungi. Here we use environmental sequence data as taxonomical evidence and take an integrated taxonomic approach by combining phylogenetic and ecological data to generate and test species hypothesis in the class Archaeorhizomycetes (Taphrinomycotina, Ascomycota). Based on environmental amplicon sequencing we recognize 68 distinct phylogenetic species hypotheses (PSHs) of Archaeorhizomycetes, including the two described species in the class, in a well-studied Swedish pine forest podzol soil. Nine of the species hypotheses, including the more abundant ones, are supported by long read data and represent 78% of the sequenced Archaeorhizomycetes community. Among well supported sister PSHs, significantly differential distribution in the soil profile provide additional ecological evidence supporting the identification of two novel species for which we provide molecular diagnostics and propose names. Our analysis indicates that frequent and abundant taxa can be phylogenetically resolved in environmental samples, while rare taxa remain un-captured at our sampling and sequencing intensity. While environmental sequences cannot be automatically translated to species hypothesis, they can be used to generate phylogenetic and ecological evidence supporting species recognition of abundant species without physical specimens.

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Relationship between soil nutrients and mycorrhizal associations of twoBipinnulaspecies (Orchidaceae) from central Chile

Cited by 43 publications

References 57 publications

Diversity of root-associated culturable fungi ofCephalanthera rubra(Orchidaceae) in relation to soil characteristics

Diversity of root-associated culturable fungi ofCephalanthera rubra(Orchidaceae) in relation to soil characteristics

Mycorrhizal fungi affect orchid distribution and population dynamics

Peeking into the black box – integrated taxonomy of Archaeorhizomycetes

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