Incipient loss of flagella in the genus Geolegnia: the emergence of a new clade within Leptolegnia?

 

Autores
Steciow, Monica Mirta; Lara, Enrique; Pillonel, Amandine; Pelizza, Sebastian Alberto; Lestani, Eduardo Ariel; Rossi, Gustavo Carlos; Belbahri, Lassaad
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2013
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
The genus Geolegnia represents a poorly documented group of saprolegnialean oomycetes isolated from soils as free-living organisms. Although it is morphologically similar to the facultative parasitic genus Leptolegnia, Geolegnia presents the uncommon property of having lost a flagellate stage in its lifecycle. Based on ITS and large subunit (LSU) rRNA sequence data, we show Geolegnia to be basal to Leptolegnia, and also introduce Geolegnia helicoides sp. nov. Using sequence data of Leptolegnia available in GenBank, supplemented by data derived from culture collections, we show that Geolegnia is nested within Leptolegnia, a genus characterised by its “conventional” biflagellate life cycle. The emergence of Geolegnia is therefore seen as a recent event, and we suggest here an evolutionary context where this loss might have been advantageous. Based on this study, Leptolegnia remains paraphyletic, awaiting the redefinition of genera in this complex.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/10948
Enlace del recurso
http://hdl.handle.net/11336/10948
Nivel de acceso
Acceso abierto
Materia
OOMYCETES
PHYLOGENY
SAPROLEGNIALES
INTERNAL TRANSCRIBED SPACER (ITS)
LARGE SUBUNIT RRNA GENE (LSU)
Micología
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS