Why Mycophoris is not an orchid seedling, and why Synaptomitus is not a fungal symbiont within this fossil

Letter

Selosse, Marc-Andre, Brundrett, Mark, Dearnaley, John, Merckx, Vincent S. F. T., Rasmussen, Finn, Zettler, Lawrence W. and Rasmussen, Hanne N.. 2017. "Why Mycophoris is not an orchid seedling, and why Synaptomitus is not a fungal symbiont within this fossil." Botany. 95 (9), pp. 865-868. https://doi.org/10.1139/cjb-2017-0038
Article Title

Why Mycophoris is not an orchid seedling, and why Synaptomitus is not a fungal symbiont within this fossil

ERA Journal ID2573
Article CategoryLetter
AuthorsSelosse, Marc-Andre (Author), Brundrett, Mark (Author), Dearnaley, John (Author), Merckx, Vincent S. F. T. (Author), Rasmussen, Finn (Author), Zettler, Lawrence W. (Author) and Rasmussen, Hanne N. (Author)
Journal TitleBotany
Journal Citation95 (9), pp. 865-868
Number of Pages4
Year2017
Place of PublicationCanada
ISSN0008-4026
1916-2790
1916-2804
Digital Object Identifier (DOI)https://doi.org/10.1139/cjb-2017-0038
Web Address (URL)https://cdnsciencepub.com/doi/10.1139/cjb-2017-0038
Abstract

A recent publication in Botany introduced two new taxa: a fossil orchid seed (Mycophoris) and a fossilized basidiomycete fungus (Synaptomitus) in an alleged relationship with this orchid, encased in 15–20 million year old Dominican amber (Poinar, G. 2017. Two new genera, Mycophoris gen. nov., (Orchidaceae) and Synaptomitus gen. nov. (Basidiomycota) based on a fossil seed with developing embryo and associated fungus in Dominican amber. Botany, 95: 1–8). From the working knowledge of extant orchid seeds, seedlings, and mycorrhiza shared among us, we cannot support these interpretations. Here we analyse: (i) why Mycophoris may not be an orchid seed, (ii) why Mycophoris is not a germinating seed, (iii) why fungal hyphae and a symbiotic fungus are absent in Mycophoris, and (iv) why Synaptomitus is likely not a fossil basidiomycete.

KeywordsDominican amber, microspermy, Mycophoris, orchid mycorrhizal fungi, Synaptomitus
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020310705. Mycology
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Byline AffiliationsNational Museum of Natural History, France
University of Western Australia
School of Agricultural, Computational and Environmental Sciences
Naturalis Biodiversity Center, Netherlands
University of Copenhagen, Denmark
Illinois College, United States
Institution of OriginUniversity of Southern Queensland
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Dearnaley, John D. W. and Bougoure, Jeremy J.. 2010. "Isotopic and molecular evidence for saprotrophic Marasmiaceae mycobionts in rhizomes of Gastrodia sesamoides." Fungal Ecology. 3 (4), pp. 288-294. https://doi.org/10.1016/j.funeco.2009.11.003
Caelestines A-D, Brominated Quinolinecarboxylic Acids from the Australian Ascidian Aplidium caelestis
Yin, Sheng, Boyle, Glen M., Carroll, Anthony R., Kotiw, Michael, Dearnaley, John, Quinn, Ronald J. and Davis, Rohan A.. 2010. "Caelestines A-D, Brominated Quinolinecarboxylic Acids from the Australian Ascidian Aplidium caelestis." Journal of Natural Products. 73 (9), pp. 1586-1589. https://doi.org/10.1021/np100329w
Phosphate transporter expression in the soybean AM symbiosis
Dearnaley, John, Learmonth, Barbara A. and Bougoure, Damian S.. 2002. "Phosphate transporter expression in the soybean AM symbiosis." 7th International Mycological Congress (IMC7). Oslo, Norway 11 - 17 Aug 2002 Australia.
Orchid mycorrhizas - a disproportionate focus on the minutiae?
Dearnaley, John. 2010. "Orchid mycorrhizas - a disproportionate focus on the minutiae?" 2010 Joint Australasian Mycological Society and the Australian Society for Mycrobiology Meeting. Sydney, Australia 04 - 08 Jul 2010
Molecular identification of mycorrhizal fungi in Australian threatened plant species
Dearnaley, John D. W., Downie, Alex F., Murray, Andrew J. and Le Brocque, Andrew F.. 2008. "Molecular identification of mycorrhizal fungi in Australian threatened plant species." Schenk, Peer (ed.) 1st International Conference on Biotic Plant Interactions (ICBPI 2008). Brisbane, Australia 27 - 29 Mar 2008 Brisbane, Australia.
Molecular identification of a mycorrhizal Sebacinaceae from the endangered Caladenia atroclavia (black clubbed spider orchid)
Dearnaley, J. D. W., Murray, A. J. and Mathieson, M. T.. 2009. "Molecular identification of a mycorrhizal Sebacinaceae from the endangered Caladenia atroclavia (black clubbed spider orchid)." Australasian Mycologist. 28 (2-3), pp. 45-50.
Defence gene expression in single mycorrhizal roots of soybean
Dearnaley, John and Learmonth, Barbara A.. 2003. "Defence gene expression in single mycorrhizal roots of soybean." 4th International Conference on Mycorrhizae (ICOM4) . Montreal, Canada 10 - 15 Aug 2003 Québec, Canada.
The mycorrhizal fungal associations of the vunerable Sophora fraseri (Fabaceae)
Downie, A. F., Le Brocque, A. F. and Dearnaley, J. D. W.. 2008. "The mycorrhizal fungal associations of the vunerable Sophora fraseri (Fabaceae)." Australasian Mycologist. 27 (2), pp. 57-65.
Lantana invades the soil too! Effects of Lantana camara on soil fungal dominance
Case, Heidi, Dearnaley, John and Le Brocque, Andrew F.. 2008. "Lantana invades the soil too! Effects of Lantana camara on soil fungal dominance." 2008 Conference of the Ecological Society of Australia (ESA 2008). Sydney, Australia 01 - 05 Dec 2008 Australia. Ecological Society of Australia.
Endophytic fungi associated with Australian orchids
Dearnaley, John and Le Brocque, Andrew F.. 2006. "Endophytic fungi associated with Australian orchids." Australasian Plant Conservation: Bulletin of the Australian Network for Plant Conservation. 15 (2), pp. 7-9.
Molecular identification of fungal endophytes in Australian myco-heterotrophic orchids
Dearnaley, John. 2006. "Molecular identification of fungal endophytes in Australian myco-heterotrophic orchids." Meyer, Wieland (ed.) 8th International Mycological Congress (IMC8). Cairns, Australia 20 - 25 Aug 2006 Australia.
Fungal endophytes in Australian myco-heterotrophic orchids
Dearnaley, John. 2006. "Fungal endophytes in Australian myco-heterotrophic orchids." Meyer, Wieland (ed.) 8th International Mycological Congress (IMC8). Cairns, Australia 20 - 25 Aug 2006 Australia.
The fungal endophytes of erythrorchis cassythoides - is this orchid saprophytic or parasitic?
Dearnaley, John. 2006. "The fungal endophytes of erythrorchis cassythoides - is this orchid saprophytic or parasitic?" Australasian Mycologist. 25 (2), pp. 51-57.
The fungal endophytes of dipodium variegatum (orchidaceae)
Bougoure, Jeremy J. and Dearnaley, John. 2005. "The fungal endophytes of dipodium variegatum (orchidaceae)." Australasian Mycologist. 24 (1), pp. 15-19.
ITS-RFLP and sequence analysis of endophytes from Acianthus, Caladenia and Pterostylis (orchidaceae) in southeastern Queensland
Bougoure, Jeremy J., Bougoure, Damian S., Cairney, John W. G. and Dearnaley, John D. W.. 2005. "ITS-RFLP and sequence analysis of endophytes from Acianthus, Caladenia and Pterostylis (orchidaceae) in southeastern Queensland." Mycological Research. 109 (4), pp. 452-460. https://doi.org/10.1017/S095375620500225X