Diverse tulasnelloid fungi form mycorrhizas with epiphytic orchids in an Andean cloud forest

Suárez, Juan Pablo; Weiß, Michael; Abele, Andrea; Garnica, Sigisfredo; Oberwinkler, Franz; Kottke, Ingrid

doi:10.1016/j.mycres.2006.08.004

Cited by 141 publications

(159 citation statements)

References 52 publications

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“…Some photosynthetic orchids, even when sampled over a wide range, have a single dominant mycorrhizal fungus (McCormick et al 2004(McCormick et al , 2006Shefferson 2005 and Irwin et al in press: Figs 2a-b). A fairly specific association for single fungi, particularly members of the Tulasnellaceae and Ceratobasidiaceae, occurs in (photosynthetic) epiphytic orchids (Otero et al 2002;Ma et al 2004;Suarez et al 2006). In contrast, some MH orchids contain a range of unrelated mycobiont taxa (Julou et al 2005;Dearnaley 2006).…”

Section: Ascomycetes As Orchid Mycobiontsmentioning

confidence: 99%

“…The common orchid associating genus Tulasnella contains many undescribed species and some phylogenetically problematic taxa eg. T. calospora (Boudier) Juel which more extensive sequence analysis should clarify (Suarez et al 2006). Taxonomic research of orchid associated heterobasidiomycetes is important from a pure scientific perspective but is crucial for orchid conservation to ensure appropriate mycorrhizal fungi are sustained with their host and potentially pathogenic fungi are excluded from pristine natural systems.…”

Section: Ascomycetes As Orchid Mycobiontsmentioning

confidence: 99%

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Further advances in orchid mycorrhizal research

2007

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Orchid mycorrhizas are mutualistic interactions between fungi and members of the Orchidaceae, the world's largest plant family. The majority of the world's orchids are photosynthetic, a small number of species are myco-heterotrophic throughout their lifetime, and recent research indicates a third mode (mixotrophy) whereby green orchids supplement their photosynthetically fixed carbon with carbon derived from their mycorrhizal fungus. Molecular identification studies of orchid-associated fungi indicate a wide range of fungi might be orchid mycobionts, show common fungal taxa across the globe, and support the view that some orchids have specific fungal interactions. Confirmation of mycorrhizal status requires isolation of the fungi and restoration of functional mycorrhizas. New methods may now be used to store orchid-associated fungi, and store and germinate seed, leading to more efficient culture of orchid species. However, many orchid mycorrhizas must be synthesised before conservation of these associations can be attempted in the field. Further gene expression studies of orchid mycorrhizas are needed to better understand the establishment and maintenance of the interaction. These data will add to efforts to conserve this diverse and valuable association.

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Section: Ascomycetes As Orchid Mycobiontsmentioning

confidence: 99%

Section: Ascomycetes As Orchid Mycobiontsmentioning

confidence: 99%

Further advances in orchid mycorrhizal research

2007

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“…In Ecuador, Suarez et al (2006) isolated mycorrhizal fungi belonging to the genera Tulasnella and Sebacina. In Brazil, many clades of Tulasnella (Epulorhiza) have been found in several species (Pereira et al 2005;Nogueira et al 2014; and Ceratobasidium has also been detected in a recent study of Coppensia doniana (sin.…”

Section: Introductionmentioning

confidence: 99%

The epiphytic orchids Ionopsis utricularioides and Psygmorchis pusilla associate with different Ceratobasidium lineages at Valle del Cauca, Colombia

et al. 2015

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In Orchidaceae, association with symbiotic fungi is required for seed germination and seedling development, thereby being the main energy source during the first steps of germination. Colombia is one of the countries with the greatest biodiversity of orchids, with an estimated 3,200 species, but few studies on orchid mycorrhiza have been conducted. In our study, we isolated and sequenced the internal transcribed spacer rDNA region of fungi from two co-occurring Colombian epiphytic orchids, I. utricularioides and P. pusilla, both belonging to the subtribe Oncidiinae. All sequences were recognized as belonging to the genus Ceratobasidium, known to be a common orchid mycorrhizal fungus in both tropical and temperate orchids. One sequence was 100% similar to fungi isolated from I. utricularioides in Costa Rica in a previous study. I. utricularioides was confirmed to be a specialist, associating with only one clade of mycorrhizal fungi. However, P. pusilla was shown to be a generalist, associating with three clades. This finding indicates that the variation in mycorrhizal specificity could be an important factor in the co-existence of orchids. The high affinity between the subtribe Oncidiinae and Ceratobasidium was also reinforced.

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“…In nature, for the germination and early growth of orchid seed and its development, it needs an association of orchid roots and mycorrhizal fungi (orchid-mycorrhiza) (Warcup 1981;Cameron et al 2006;Suarez et al 2006;Agustini et al 2009). This is because orchid seeds are very small, smooth and soft and have no cotyledon which is a food reserve in the early growth of seeds (Sarwono 2002;Agustini and Kirenius 2002).…”

Section: Introductionmentioning

confidence: 99%

“…The hyphae of mycorrhizal fungi penetrate to the cell walls of roots and then will be developed in the root cortex as dense coiled called peloton. Mycorrhizal hyphae are very delicate; therefore they will absorb water and certain minerals (Suarez et al 2006;Agustini et al 2009). …”

Section: Introductionmentioning

confidence: 99%

Isolation and phylogenetic relationship of orchid-mycorrhiza from Spathoglottis plicata of Papua using mitochondrial ribosomal large subunit (mt-Ls) DNA

2012

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Sufaati S, Agustini V, Suharno. 2012. Isolation and phylogenetic relationship of orchid-mycorrhiza from Spathoglottis plicata of Papua using mitochondrial ribosomal large subunit (mt-Ls) DNA. Biodiversitas 13: 59-64. All terrestrial mycorrhiza have mutual symbiotic with mycorrhizal fungi in order to gain nutrient from surrounding environment. This study was done to isolate and to identify mycorrhiza orchid that associates with Spathoglottis plicata and were collected from Cagar Alam Pegunungan Cycloops (CAPC), Jayapura. Isolation of mycorrhizal orchid came after the modified method of Manoch and Lohsomboon (1992). The result showed that based on the morphological characteristic, there were presumably 14 isolations. However, only 2 isolations have been known, namely Rhizoctonia sp. and Tulasnella sp., while the rest were not identified yet. Among them, the DNA of the 11 isolations were able to be extracted for further analysis. The constructed phylogenetic tree performed that those species could be grouped into 4 major clusters. Two species, Rhizoctonia sp. and Tulasnella sp. were in different clusters.

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Diverse tulasnelloid fungi form mycorrhizas with epiphytic orchids in an Andean cloud forest

Cited by 141 publications

References 52 publications

Further advances in orchid mycorrhizal research

Further advances in orchid mycorrhizal research

The epiphytic orchids Ionopsis utricularioides and Psygmorchis pusilla associate with different Ceratobasidium lineages at Valle del Cauca, Colombia

Isolation and phylogenetic relationship of orchid-mycorrhiza from Spathoglottis plicata of Papua using mitochondrial ribosomal large subunit (mt-Ls) DNA

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