@ARTICLE{TreeBASE2Ref21295,
author = {Pavel Skaloud and Tomas Kalina and Katarina Nemjova and Olivier De Clerck and Frederik Leliaert},
title = {Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae)},
year = {2013},
keywords = {Chlorochytrium, Chlorophyceae, chloroplast, Kentrosphaera, phylogeny, Scotinosphaera, taxonomy, ultrastructure, Ulvophyceae},
doi = {10.1111/jpy.12021},
url = {http://botany.natur.cuni.cz/algo/soubory/publikace/2013_Skaloud_et_al_Scotinosphaerales.pdf},
pmid = {},
journal = {Journal of Phycology},
volume = {49},
number = {1},
pages = {115?129},
abstract = {The green algal family Chlorochytriaceae comprises relatively large coccoid algae with secondarily thickened cell walls. Despite its morphological distinctness, the family remained molecularly uncharacterized. In this study, we investigated the morphology and phylogenetic position of 16 strains determined as members of two Chlorochytriaceae genera, Chlorochytrium and Scotinosphaera. The phylogenetic reconstructions were based on the analyses of two datasets, including a broad, concatenated alignment of SSU rDNA and rbcL sequences, and a 10-gene alignment of 32 selected taxa. All analyses revealed the distant relation of the two genera, segregated in two different classes: Chlorophyceae and Ulvophyceae. Chlorochytrium strains were inferred in two distinct clades of the Stephanosphaerinia clade within the Chlorophyceae. Whereas clade A morphologically fits the description of Chlorochytrium, the strains of clade B coincide with the circumscription of the genus Neospongiococcum. The Scotinosphaera strains formed a distinct and highly divergent clade within the Ulvophyceae, warranting the recognition of a new order, Scotinosphaerales. Morphologically, the order is characterized by large cells bearing local cell wall thickenings, pyrenoid matrix dissected by numerous anastomosing cytoplasmatic channels, sporogenesis comprising the accumulation of secondary carotenoids in the cell periphery and almost simultaneous cytokinesis. The close relationship of the Scotinosphaerales with other early diverging ulvophycean orders enforces the notion that non-motile unicellular freshwater organisms have played an important role in the early diversification of the Ulvophyceae.}
}
Citation for Study 13318
Citation title:
"Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae)".
Study name:
"Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae)".
This study is part of submission 13318
(Status: Published).
Citation
Skaloud P., Kalina T., Nemjova K., De clerck O., & Leliaert F. 2013. Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae). Journal of Phycology, 49(1): 115?129.
Authors
-
Skaloud P.
-
Kalina T.
-
Nemjova K.
-
De clerck O.
-
Leliaert F.
Abstract
The green algal family Chlorochytriaceae comprises relatively large coccoid algae with secondarily thickened cell walls. Despite its morphological distinctness, the family remained molecularly uncharacterized. In this study, we investigated the morphology and phylogenetic position of 16 strains determined as members of two Chlorochytriaceae genera, Chlorochytrium and Scotinosphaera. The phylogenetic reconstructions were based on the analyses of two datasets, including a broad, concatenated alignment of SSU rDNA and rbcL sequences, and a 10-gene alignment of 32 selected taxa. All analyses revealed the distant relation of the two genera, segregated in two different classes: Chlorophyceae and Ulvophyceae. Chlorochytrium strains were inferred in two distinct clades of the Stephanosphaerinia clade within the Chlorophyceae. Whereas clade A morphologically fits the description of Chlorochytrium, the strains of clade B coincide with the circumscription of the genus Neospongiococcum. The Scotinosphaera strains formed a distinct and highly divergent clade within the Ulvophyceae, warranting the recognition of a new order, Scotinosphaerales. Morphologically, the order is characterized by large cells bearing local cell wall thickenings, pyrenoid matrix dissected by numerous anastomosing cytoplasmatic channels, sporogenesis comprising the accumulation of secondary carotenoids in the cell periphery and almost simultaneous cytokinesis. The close relationship of the Scotinosphaerales with other early diverging ulvophycean orders enforces the notion that non-motile unicellular freshwater organisms have played an important role in the early diversification of the Ulvophyceae.
Keywords
Chlorochytrium, Chlorophyceae, chloroplast, Kentrosphaera, phylogeny, Scotinosphaera, taxonomy, ultrastructure, Ulvophyceae
External links
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S13318
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref21295,
author = {Pavel Skaloud and Tomas Kalina and Katarina Nemjova and Olivier De Clerck and Frederik Leliaert},
title = {Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae)},
year = {2013},
keywords = {Chlorochytrium, Chlorophyceae, chloroplast, Kentrosphaera, phylogeny, Scotinosphaera, taxonomy, ultrastructure, Ulvophyceae},
doi = {10.1111/jpy.12021},
url = {http://botany.natur.cuni.cz/algo/soubory/publikace/2013_Skaloud_et_al_Scotinosphaerales.pdf},
pmid = {},
journal = {Journal of Phycology},
volume = {49},
number = {1},
pages = {115?129},
abstract = {The green algal family Chlorochytriaceae comprises relatively large coccoid algae with secondarily thickened cell walls. Despite its morphological distinctness, the family remained molecularly uncharacterized. In this study, we investigated the morphology and phylogenetic position of 16 strains determined as members of two Chlorochytriaceae genera, Chlorochytrium and Scotinosphaera. The phylogenetic reconstructions were based on the analyses of two datasets, including a broad, concatenated alignment of SSU rDNA and rbcL sequences, and a 10-gene alignment of 32 selected taxa. All analyses revealed the distant relation of the two genera, segregated in two different classes: Chlorophyceae and Ulvophyceae. Chlorochytrium strains were inferred in two distinct clades of the Stephanosphaerinia clade within the Chlorophyceae. Whereas clade A morphologically fits the description of Chlorochytrium, the strains of clade B coincide with the circumscription of the genus Neospongiococcum. The Scotinosphaera strains formed a distinct and highly divergent clade within the Ulvophyceae, warranting the recognition of a new order, Scotinosphaerales. Morphologically, the order is characterized by large cells bearing local cell wall thickenings, pyrenoid matrix dissected by numerous anastomosing cytoplasmatic channels, sporogenesis comprising the accumulation of secondary carotenoids in the cell periphery and almost simultaneous cytokinesis. The close relationship of the Scotinosphaerales with other early diverging ulvophycean orders enforces the notion that non-motile unicellular freshwater organisms have played an important role in the early diversification of the Ulvophyceae.}
}
- Show RIS reference
TY - JOUR
ID - 21295
AU - Skaloud,Pavel
AU - Kalina,Tomas
AU - Nemjova,Katarina
AU - De Clerck,Olivier
AU - Leliaert,Frederik
T1 - Morphology and phylogenetic position of the freshwater green microalgae Chlorochytrium (Chlorophyceae) and Scotinosphaera (Scotinosphaerales, ord. nov., Ulvophyceae)
PY - 2013
KW - Chlorochytrium
KW - Chlorophyceae
KW - chloroplast
KW - Kentrosphaera
KW - phylogeny
KW - Scotinosphaera
KW - taxonomy
KW - ultrastructure
KW - Ulvophyceae
UR - http://botany.natur.cuni.cz/algo/soubory/publikace/2013_Skaloud_et_al_Scotinosphaerales.pdf
N2 - The green algal family Chlorochytriaceae comprises relatively large coccoid algae with secondarily thickened cell walls. Despite its morphological distinctness, the family remained molecularly uncharacterized. In this study, we investigated the morphology and phylogenetic position of 16 strains determined as members of two Chlorochytriaceae genera, Chlorochytrium and Scotinosphaera. The phylogenetic reconstructions were based on the analyses of two datasets, including a broad, concatenated alignment of SSU rDNA and rbcL sequences, and a 10-gene alignment of 32 selected taxa. All analyses revealed the distant relation of the two genera, segregated in two different classes: Chlorophyceae and Ulvophyceae. Chlorochytrium strains were inferred in two distinct clades of the Stephanosphaerinia clade within the Chlorophyceae. Whereas clade A morphologically fits the description of Chlorochytrium, the strains of clade B coincide with the circumscription of the genus Neospongiococcum. The Scotinosphaera strains formed a distinct and highly divergent clade within the Ulvophyceae, warranting the recognition of a new order, Scotinosphaerales. Morphologically, the order is characterized by large cells bearing local cell wall thickenings, pyrenoid matrix dissected by numerous anastomosing cytoplasmatic channels, sporogenesis comprising the accumulation of secondary carotenoids in the cell periphery and almost simultaneous cytokinesis. The close relationship of the Scotinosphaerales with other early diverging ulvophycean orders enforces the notion that non-motile unicellular freshwater organisms have played an important role in the early diversification of the Ulvophyceae.
L3 - 10.1111/jpy.12021
JF - Journal of Phycology
VL - 49
IS - 1
ER -