Insight into the morphology and genetic diversity of the Chaetoceros tenuissimus (Bacillariophyta) species complex

Grzebyk, D.; Pasqualini, V.; Garrido, M.; Quilichini, Y.; Pereto, C.; /Cecchi, Philippe

DSpace Principal
→
Colección de los Centros Asociados
→
Francia
→
Institut de Recherche pour le Développement - IRD - Cosecha
→
Ver ítem

dc.creator	Grzebyk, D.
dc.creator	Pasqualini, V.
dc.creator	Garrido, M.
dc.creator	Quilichini, Y.
dc.creator	Pereto, C.
dc.creator	/Cecchi, Philippe
dc.date	2022
dc.date.accessioned	2022-04-27T17:37:54Z
dc.date.available	2022-04-27T17:37:54Z
dc.identifier	https://www.documentation.ird.fr/hor/fdi:010084366
dc.identifier	oai:ird.fr:fdi:010084366
dc.identifier	Grzebyk D., Pasqualini V., Garrido M., Quilichini Y., Pereto C., Cecchi Philippe. Insight into the morphology and genetic diversity of the Chaetoceros tenuissimus (Bacillariophyta) species complex. 2022, [Early access], p. [19 p.]
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169157
dc.description	Among the marine planktonic diatoms, Chaetoceros is among the most species-rich genera, and many Chaetoceros species are considered important primary producers. However, little is known about the ecology and distribution of the few small solitary species within this genus, including Chaetoceros tenuissimus. This article describes a minute Chaetoceros strain, identified as C. tenuissimus (named CT16ED) that was isolated at a coastal lagoon in Corsica Island, Western Mediterranean. The strain was characterized by light microscopy and scanning and transmission electron microscopy, with a specific focus on the fine structure and construction of setae and its behaviour in culture. The CT16ED strain was compared with other strains we isolated from the species type locality (Ostend Harbour, North Sea) by sequencing a fragment of the nuclear ribosomal DNA (rDNA) spanning from the 18S rDNA to the D3 region of the 28S rDNA, and the plastid rbcL gene that codes the large RuBisCO subunit. Based on the literature and the available sequence data, the analysed strains were similar to C. tenuissimus but the phylogenetic analysis indicated a C. tenuissimus species complex that contained several clades, therefore the current taxonomic status of C. tenuissimus is discussed. The comparison with the available rDNA and rbcL sequencing data of strains assigned to species considered as synonyms of C. tenuissimus, including Chaetoceros simplex var. calcitrans, Chaetoceros calcitrans and Chaetoceros calcitrans f. pumilus, suggested that these taxa are paraphyletic within the genus Chaetoceros.
dc.language	EN
dc.subject	Cell division
dc.subject	Chaetoceros tenuissimus
dc.subject	internal transcribed spacer (ITS)
dc.subject	morphology
dc.subject	phylogeny
dc.subject	rDNA
dc.subject	ultrastructure
dc.title	Insight into the morphology and genetic diversity of the Chaetoceros tenuissimus (Bacillariophyta) species complex
dc.type	text