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Abstract:

The Rhizophydiales is the most recently circumscribed order in the Chytridiomycota. Past studies focused on soil chytrids from North America and Australia to determine the range of diversity within this clade of chytrids and established three families (Rhizophydiaceae, Terramycetaceae, and Kappamycetaceae) in the new order. Although Rhizophydiales contains seemingly simple chytrids morphologically, analyses of ribosomal gene sequences and zoospore characters have demonstrated unexpected genetic and ultrastructural diversity, highlighting the need for broader habitat and geographic sampling to reveal the actual diversity within this new order. To enlarge our sampling, in this study we investigated 38 newly cultured chytrids collected from aquatic habitats in Argentina, a territory under-explored for chytrid diversity. From analyses of thallus morphology, zoospore ultrastructure, and 28S and ITS1-5.8S-ITS2 ribosomal gene sequences, we expand the concept of Rhizophydiales, describing seven new families (Alphamycetaceae, Angulomycetaceae, Aquamycetaceae, Globomycetaceae, Gorgonomycetaceae, Pateramycetaceae, and Protrudomycetaceae) and eight new genera (Alphamyces, Angulomyces, Aquamyces, Globomyces, Urceomyces, Gorgonomyces, Pateramyces, and Protrudomyces). Results of this study underscore that even more extensive sampling from varied habitats and geographies is needed to adequately ascertain the diversity of chytrids in the Rhizophydiales. © 2008 The British Mycological Society.

Registro:

Documento: Artículo
Título:Ultrastructural and molecular analyses of Rhizophydiales (Chytridiomycota) isolates from North America and Argentina
Autor:Letcher, P.M.; Vélez, C.G.; Barrantes, M.E.; Powell, M.J.; Churchill, P.F.; Wakefield, W.S.
Filiación:Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL 35487, United States
Departamento de Biodiversidad y Biologia Experimental, Universidad de Buenos Aires, C1428EHA Buenos Aires, Argentina
Palabras clave:Chytrid; Phylogeny; Ribosomal genes; Taxonomy; Zoospore; fungal DNA; ribosomal spacer DNA; ribosome DNA; RNA 28S; fungus; genetic variation; molecular analysis; morphology; new genus; phylogeny; spore; taxonomy; ultrastructure; Argentina; article; Chytridiomycetes; classification; genetics; geography; isolation and purification; molecular genetics; North America; phylogeny; transmission electron microscopy; ultrastructure; Argentina; Chytridiomycota; DNA, Fungal; DNA, Ribosomal; DNA, Ribosomal Spacer; Geography; Microscopy, Electron, Transmission; Molecular Sequence Data; North America; Phylogeny; RNA, Ribosomal, 28S; Argentina; North America; South America; Chytridiomycota
Año:2008
Volumen:112
Número:7
Página de inicio:759
Página de fin:782
DOI: http://dx.doi.org/10.1016/j.mycres.2008.01.025
Título revista:Mycological Research
Título revista abreviado:Mycol. Res.
ISSN:09537562
CODEN:MYCRE
CAS:DNA, Fungal; DNA, Ribosomal Spacer; DNA, Ribosomal; RNA, Ribosomal, 28S
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09537562_v112_n7_p759_Letcher

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Citas:

---------- APA ----------
Letcher, P.M., Vélez, C.G., Barrantes, M.E., Powell, M.J., Churchill, P.F. & Wakefield, W.S. (2008) . Ultrastructural and molecular analyses of Rhizophydiales (Chytridiomycota) isolates from North America and Argentina. Mycological Research, 112(7), 759-782.
http://dx.doi.org/10.1016/j.mycres.2008.01.025
---------- CHICAGO ----------
Letcher, P.M., Vélez, C.G., Barrantes, M.E., Powell, M.J., Churchill, P.F., Wakefield, W.S. "Ultrastructural and molecular analyses of Rhizophydiales (Chytridiomycota) isolates from North America and Argentina" . Mycological Research 112, no. 7 (2008) : 759-782.
http://dx.doi.org/10.1016/j.mycres.2008.01.025
---------- MLA ----------
Letcher, P.M., Vélez, C.G., Barrantes, M.E., Powell, M.J., Churchill, P.F., Wakefield, W.S. "Ultrastructural and molecular analyses of Rhizophydiales (Chytridiomycota) isolates from North America and Argentina" . Mycological Research, vol. 112, no. 7, 2008, pp. 759-782.
http://dx.doi.org/10.1016/j.mycres.2008.01.025
---------- VANCOUVER ----------
Letcher, P.M., Vélez, C.G., Barrantes, M.E., Powell, M.J., Churchill, P.F., Wakefield, W.S. Ultrastructural and molecular analyses of Rhizophydiales (Chytridiomycota) isolates from North America and Argentina. Mycol. Res. 2008;112(7):759-782.
http://dx.doi.org/10.1016/j.mycres.2008.01.025