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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F11%3A10105547%21RIV12-GA0-11310___
rdf:type
n6:Vysledek skos:Concept
rdfs:seeAlso
http://botany.natur.cuni.cz/algo/soubory/publikace/2011_Skaloud_et_al.pdf
dcterms:description
Micrasterias, the name of which is derived from the Greek for 'little star', comprises possibly the most spectacularly shaped desmids (Desmidiales, Streptophyta). Presently, the genus Micrasterias includes about 60 traditional species, the majority of which were described in the early 19th century. We used a comprehensive multigene dataset (including SSU rDNA, psaA, and coxIII loci) of 34 Micrasterias taxa to assess the relationships between individual morphological species. The resulting phylogeny was used to assess the patterns characterizing the morphological evolution of this genus. The phylogenetic analysis led to the recognition of eight well-resolved lineages that could be characterized by selected morphological features. Apart from the members of Micrasterias, three species belonged to different traditional desmid genera (Cosmarium, Staurodesmus, and Triploceras) and were inferred to be nested within the genus. Morphological comparisons of these species with their relatives revealed an accelerated rate of morphological evolution. Mapping morphological diversification of the genus on the phylogenetic tree revealed profound differences in the phylogenetic signal of selected phenotypic features. Whereas the branching pattern of the cells clearly correlated with the phylogeny, cell complexity possibly reflected rather their adaptive morphological responses to environmental conditions. Finally, ancestral reconstruction of distribution patterns indicated potential origin of the genus in North America, with additional speciation events occurring in the Indo-Malaysian region. Micrasterias, the name of which is derived from the Greek for 'little star', comprises possibly the most spectacularly shaped desmids (Desmidiales, Streptophyta). Presently, the genus Micrasterias includes about 60 traditional species, the majority of which were described in the early 19th century. We used a comprehensive multigene dataset (including SSU rDNA, psaA, and coxIII loci) of 34 Micrasterias taxa to assess the relationships between individual morphological species. The resulting phylogeny was used to assess the patterns characterizing the morphological evolution of this genus. The phylogenetic analysis led to the recognition of eight well-resolved lineages that could be characterized by selected morphological features. Apart from the members of Micrasterias, three species belonged to different traditional desmid genera (Cosmarium, Staurodesmus, and Triploceras) and were inferred to be nested within the genus. Morphological comparisons of these species with their relatives revealed an accelerated rate of morphological evolution. Mapping morphological diversification of the genus on the phylogenetic tree revealed profound differences in the phylogenetic signal of selected phenotypic features. Whereas the branching pattern of the cells clearly correlated with the phylogeny, cell complexity possibly reflected rather their adaptive morphological responses to environmental conditions. Finally, ancestral reconstruction of distribution patterns indicated potential origin of the genus in North America, with additional speciation events occurring in the Indo-Malaysian region.
dcterms:title
A multilocus phylogeny of the desmid genus Micrasterias (Streptophyta): evidence for the accelerated rate of morphological evolution in protists. A multilocus phylogeny of the desmid genus Micrasterias (Streptophyta): evidence for the accelerated rate of morphological evolution in protists.
skos:prefLabel
A multilocus phylogeny of the desmid genus Micrasterias (Streptophyta): evidence for the accelerated rate of morphological evolution in protists. A multilocus phylogeny of the desmid genus Micrasterias (Streptophyta): evidence for the accelerated rate of morphological evolution in protists.
skos:notation
RIV/00216208:11310/11:10105547!RIV12-GA0-11310___
n6:predkladatel
n21:orjk%3A11310
n4:aktivita
n5:Z n5:S n5:P
n4:aktivity
P(GA206/09/0906), S, Z(MSM0021620828)
n4:cisloPeriodika
3
n4:dodaniDat
n18:2012
n4:domaciTvurceVysledku
n11:5414121 n11:3472779 n11:2548739 n11:6290671 n11:2896729
n4:druhVysledku
n7:J
n4:duvernostUdaju
n19:S
n4:entitaPredkladatele
n9:predkladatel
n4:idSjednocenehoVysledku
183912
n4:idVysledku
RIV/00216208:11310/11:10105547
n4:jazykVysledku
n14:eng
n4:klicovaSlova
Protists; Phylogeny; Morphology; Micrasterias; Evolution; Biogeography
n4:klicoveSlovo
n8:Evolution n8:Biogeography n8:Morphology n8:Phylogeny n8:Micrasterias n8:Protists
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[57E3C3A54AF6]
n4:nazevZdroje
Molecular Phylogenetics and Evolution
n4:obor
n12:EF
n4:pocetDomacichTvurcuVysledku
5
n4:pocetTvurcuVysledku
5
n4:projekt
n16:GA206%2F09%2F0906
n4:rokUplatneniVysledku
n18:2011
n4:svazekPeriodika
61
n4:tvurceVysledku
Škaloud, Pavel Nemjová, Katarína Černá, Kateřina Veselá, Jana Neustupa, Jiří
n4:wos
000297387600031
n4:zamer
n20:MSM0021620828
s:issn
1055-7903
s:numberOfPages
11
n22:doi
10.1016/j.ympev.2011.08.018
n10:organizacniJednotka
11310