Biology:Olpidium
| Olpidium | |
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| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Class: | incertae sedis
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| Order: | incertae sedis
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| Family: | |
| Genus: | Olpidium (A.Braun) J.Schröt.
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| Type species | |
| Olpidium endogenum (A. Br.) Schroet.[1]
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| Synonyms[2] | |
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Olpidium is a fungal genus in the family Olpidiaceae. Members of Olpidium are zoosporic pathogens of plants, animals, fungi, and oomycetes.[3][4]
Morphology
Olpidium species exist as spherical zoosporangia inside the cells of their host. Zoospores emerge from a single discharge tube and have a single, posterior whiplash flagellum. Resting spores can be smooth or ornamented.[4]
Ecology
Olpidium species infect a wide variety of plants, animals, protists, and fungi and are fairly common in aquatic and terrestrial ecosystems. Most of what is known about the genus comes from those species that infect higher plants, especially crops.[5][6]
In higher plants, infection with Olpidium often causes little to no symptoms. An exception is Olpidium viciae, which causes broadbean blister.[6] However, Olpidium species can vector plant viruses.[5] For example, Olpidium brassicae transmits big-vein virus and big-vein associated varicosavirus among lettuce plants, and transmits tobacco mosaic virus among tobacco plants. Olpidium bornovanus or Olpidium cucurbitacearum serves as a vectors for a number of curcubit viruses.[6]
Taxonomy
The genus Olpidium was placed in the Olpidiaceae in the Chytridiales.[3] Later some species, notably O. brassicae, were moved to the genus Pleotrachelus, but these were later moved back into the genus.[6] Based on zoospore ultrastructure, Donald J. S. Barr moved the genus into Spizellomycetales[7] In studies using molecular phylogenetics, O. brassicae, O. virulentus, and O. bornovanus were found to cluster with members of the former Zygomycota not with members of Chytridiomycota. One researcher, has elevated Olpidium to the level of phylum (Olpidiomycota) and split the genus into several genera.[6] While nomenclaturaly valid and accepted by some researchers,[8] others view these changes as controversial and unsupported.[6]
References
- ↑ Clements, Frederic E.; Shear, Cornelius L. (1931). The Genera of Fungi. The H. W. Wilson Company. p. 234.
- ↑ Part 1- Virae, Prokarya, Protists, Fungi. http://mave.tweakdsl.nl/tn/genera1.html. Retrieved 30 June 2016.
- ↑ Jump up to: 3.0 3.1 Fitzpatrick, Harry Morton (1930). The Lower Fungi: Phycomyetes. McGraw-Hill Book Company.
- ↑ Jump up to: 4.0 4.1 Sparrow F.K. (1060). Aquatic Phycomycetes (second ed.). The University of Michigan Press.
- ↑ Jump up to: 5.0 5.1 Alexopoulos CJ.; Mims SW.; Blackwell M. (1996). Introductory Mycology (fourth ed.). John Wiley & Sons, Inc.. pp. 161–162.
- ↑ Jump up to: 6.0 6.1 6.2 6.3 6.4 6.5 Lay, Chih-Ying; Hamel, Chantal; St-Arnaud, Marc (2018). "Taxonomy and pathogenicity of Olpidium brassicae and its allied species". Fungal Biology 122 (9): 837–846. doi:10.1016/j.funbio.2018.04.012. PMID 30115317.
- ↑ Barr, Donald J.S. (1990). "An outline for the reclassification of the Chytridiales, and for a new order, the Spizellomycetales". Canadian Journal of Botany 58 (22): 2380–2394. doi:10.1139/b80-276.
- ↑ Wijayawardene, N.N. (2018). "Notes for genera: basal clades of fungi (including Aphelidiomycota, Basidiobolomycota, Blastocladiomycota, Calcarisporiellomycota, Caulochytriomycota, Chytridiomycota, Entomophthoromycota, Glomeromycota, Kickxellomycota, Monoblepharomycota, Mortierellomycota, Mucoromycota, Neocallimastigomycota, Olpidiomycota, Rozellomycota and Zoopagomycota)". Fungal Diversity 92: 43–129. doi:10.1007/s13225-018-0409-5. http://eprints.ibb.waw.pl/1573/1/2018%20Wijayawardene%20et%20al%20basal%20clades_proof.pdf.
External links
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Wikidata ☰ Q10609302 entry
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