ArticleAnnals of botany2020
Specific mycorrhizal associations involving the same fungal taxa in common and threatened Caladenia (Orchidaceae): implications for conservation.
Article in Annals of botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed.
- Mycorrhizal communities in Orchidaceae are likely shaped by plant trophic mode and biogeography but not phylogeny.Plant diversity · 2026Article
- Discordance Down Under: Combining Phylogenomics and Fungal Symbioses to Detangle Difficult Nodes in a Diverse Tribe of Australian Terrestrial Orchids.Systematic biology · 2025Article
- Persistent Habitat Instability and Patchiness, Sexual Attraction, Founder Events, Drift and Selection: A Recipe for Rapid Diversification of Orchids.Plants (Basel, Switzerland) · 2025Review
- Transcriptomic and protein-protein interaction network analyses of the molecular mechanisms underlying the mycorrhizal interaction inFrontiers in plant science · 2025Article
- Temporal turnover of Ceratobasidiaceae orchid mycorrhizal fungal communities with ontogenetic and phenological development in Prasophyllum (Orchidaceae).Annals of botany · 2024Article
- Sexual attraction with pollination during feeding behaviour: implications for transitions between specialized strategies.Annals of botany · 2024Article
- Culture age of Tulasnella affects symbiotic germination of the critically endangered Wyong sun orchid Thelymitra adorata (Orchidaceae).Mycorrhiza · 2023Article
- Strong phylogenetic congruence between Tulasnella fungi and their associated Drakaeinae orchids.Journal of evolutionary biology · 2023Article
- Inorganic phosphorus nutrition in green-leaved terrestrial orchid seedlings.Annals of botany · 2022Article
- Improving Taxonomic Delimitation of Fungal Species in the Age of Genomics and Phenomics.Frontiers in microbiology · 2022Review
- How Mycorrhizal Associations Influence Orchid Distribution and Population Dynamics.Frontiers in plant science · 2021Review
- Progress and Prospects of Mycorrhizal Fungal Diversity in Orchids.Frontiers in plant science · 2021Review
- Orchid conservation: from theory to practice.Annals of botany · 2020Article
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9 authors.
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Abstract
BACKGROUND AND
aimsIn orchid conservation, quantifying the specificity of mycorrhizal associations, and establishing which orchid species use the same fungal taxa, is important for sourcing suitable fungi for symbiotic propagation and selecting sites for conservation translocation. For Caladenia subgenus Calonema (Orchidaceae), which contains 58 threatened species, we ask the following questions. (1) How many taxa of Serendipita mycorrhizal fungi do threatened species of Caladenia associate with? (2) Do threatened Caladenia share orchid mycorrhizal fungi with common Caladenia? (3) How geographically widespread are mycorrhizal fungi associated with Caladenia?
methodsFungi were isolated from 127 Caladenia species followed by DNA sequencing of the internal transcibed spacer (ITS) sequence locus. We used a 4.1-6 % sequence divergence cut-off range to delimit Serendipita operational taxonomic units (OTUs). We conducted trials testing the ability of fungal isolates to support germination and plant growth. A total of 597 Serendipita isolates from Caladenia, collected from across the Australian continent, were used to estimate the geographic range of OTUs. KEY
resultsAcross the genus, Caladenia associated with ten OTUs of Serendipita (Serendipitaceae) mycorrhizal fungi. Specificity was high, with 19 of the 23 threatened Caladenia species sampled in detail associating solely with OTU A, which supported plants from germination to adulthood. The majority of populations of Caladenia associated with one OTU per site. Fungal sharing was extensive, with 62 of the 79 Caladenia sampled in subgenus Calonema associating with OTU A. Most Serendipita OTUs were geographically widespread.
conclusionsMycorrhizal fungi can be isolated from related common species to propagate threatened Caladenia. Because of high specificity of most Caladenia species, only small numbers of OTUs typically need to be considered for conservation translocation. When selecting translocation sites, the geographic range of the fungi is not a limiting factor, and using related Caladenia species to infer the presence of suitable fungal OTUs may be feasible.
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