Analyses of ribosomal RNA sequences from glaucocystophyte cyanelles provide new insights into the evolutionary relationships of plastids

@article{Helmchen2004AnalysesOR,
  title={Analyses of ribosomal RNA sequences from glaucocystophyte cyanelles provide new insights into the evolutionary relationships of plastids},
  author={T Helmchen and Debashish Bhattacharya and Michael Melkonian},
  journal={Journal of Molecular Evolution},
  year={2004},
  volume={41},
  pages={203-210}
}
Glaucocystophyte algae (sensu Kies, Berl. Deutsch. Bot. Ges. 92, 1979) contain plastids (cyanelles) that retain the peptidoglycan wall of the putative cyanobacterial endosymbiont; this and other ultrastructural characters (e.g., unstacked thylakoids, phycobilisomes) have suggested that cyanelles are “primitive” plastids that may represent undeveloped associations between heterotrophic “host” cells (i.e., glaucocystophytes) and cyanobacteria. To test the monophyly of glaucocystophyte cyanelles… Expand
Monophyly of Archaeplastida supergroup and relationships among its lineages in the light of phylogenetic and phylogenomic studies. Are we close to a consensus
TLDR
Based on results to date, it is neither possible to confirm nor refute alternative evolutionary scenarios to a single primary endosymbiosis, but if trees supporting monophyly are considered, relationships inferred among Archaeplastida lineages can be discussed. Expand
Monophyly of Archaeplastida supergroup and relationships among its lineages in the light of phylogenetic and phylogenomic studies. Are we close to a consensus
TLDR
Based on results to date, it is neither possible to confirm nor refute alternative evolutionary scenarios to a single primary endosymbiosis, but if trees supporting monophyly are considered, relationships inferred among Archaeplastida lineages can be discussed. Expand
Hidden biodiversity of the extremophilic Cyanidiales red algae
TLDR
The research revealed an unexpected level of genetic diversity among Cyanidiales that revises current thinking about the phylogeny and biodiversity of this group and predicts that future environmental PCR studies will significantly augment known biodiversity that is discovered and demonstrate the Cyanidials to be a species‐rich branch of red algal evolution. Expand
Phylogeny of nuclear-encoded plastid-targeted proteins supports an early divergence of glaucophytes within Plantae.
TLDR
Strong support is found for the early divergence of glaucophyte plastids and the cyanobacterial endosymbiont that gave rise to this organelle: the presence of a peptidoglycan deposition between the 2 organelle membranes and carboxysomes. Expand
Molecular evolutionary studies on the chlorarachniophyte : Bigelowiella natans
TLDR
Phylogenetic analysis of concatenated chloroplast protein coding genes indicates that the endosymbiont of B. natans may be a derived green algae, and argues strongly against a single origin of chlorarachniophyte and euglenids plastids predicted by the cabozoa hypothesis. Expand
Molecular markers from different genomic compartments reveal cryptic diversity within glaucophyte species.
TLDR
Molecular phylogenetics and genetic distance estimations of diverse molecular markers are used to explore strain and species diversity within the glaucophyte genera Cyanophora and Glaucocystis and unveil previously unrecognized cryptic diversity within these species. Expand
Diversity and evolutionary history of plastids and their hosts.
  • P. Keeling
  • Biology, Medicine
  • American journal of botany
  • 2004
TLDR
The history of the plastid and of its various hosts is reviewed with particular attention to the number and nature of the endosymbiotic events that led to the current distribution of plastids. Expand
The single, ancient origin of chromist plastids
TLDR
A taxonomically diverse group of chlorophyll c2-containing protists comprising cryptophyte, haptophyte and stramenopiles algae (Chromista) share a common plastid that most likely arose from a single, ancient secondary endosymbiosis involving a red alga, consistent with Chromista monophyly and implicates secondary endOSymbiotic as an important force in generating eukaryotic biodiversity. Expand
Carboxysomes and peptidoglycan walls of cyanelles: possible physiological functions
TLDR
The hypothesis presented here relates the peptidoglycan wall and the function of carboxysomes to the involvement of active water efflux using contractile vacuoles or their functional equivalent in volume regulation of non- cyanelle compartments of the cell in at least some parts of the life cycle. Expand
Plastid Origins
The evolution of oxygenic photosynthesis in the ancestors of present-day cyanobacteria transformed the biosphere of our planet (Blankenship 1994; ReyesPrieto et al. 2007). This landmark event wasExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 74 REFERENCES
Comparisons of nuclear-encoded small-subunit ribosomal RNAs reveal the evolutionary position of the Glaucocystophyta.
TLDR
Maximum likelihood, maximum-parsimony, and neighbor-joining phylogenetic analyses show that the Glaucocystophyta is a relatively late-diverging monophyletic assemblage within the "crown" group radiation that forms a sister group to cryptophyte algae. Expand
Evolutionary relationships among cyanobacteria and green chloroplasts
TLDR
The results indicate that many diverse forms of cyanobacteria diverged within a short span of evolutionary distance and suggest that the chloroplast lineage, which includes the cyanelle of C. paradoxa, is not just a sister group to the free-living forms but rather is contained within the cyanobacterial radiation. Expand
Molecular Evolutionary Analyses of Nuclear‐Encoded Small Subunit Ribosomal RNA Identify an Independent Rhizopod Lineage Containing the Euglyphina and the Chlorarachniophyta
TLDR
The results provide further evidence for the polyphyly of the Rhizopoda and support the creation of a new amoeboid lineage which includes the Euglyphina and the chlorarachniophyte algae; taxa with tubular mitochondrial cristae and filose or reticulate pseudopodia. Expand
Gene phylogenies and the endosymbiotic origin of plastids.
TLDR
Analysis of psbA, tufA, atpB and SSU rRNA sequences suggests that only a single bacterial endosympbiotic event occurred leading to plastids in the various algal and plant lineages, while analysis of rbcL and rbcS sequences strongly suggests that plastid are polyphyletic in origin. Expand
Molecular evidence for the origin of plastids from a cyanobacterium-like ancestor
TLDR
Using a distance matrix method, the phylogenetic relationships among representatives of these lineages have been inferred and the results indicate a common origin of plastids from a cyanobacterium-like ancestor. Expand
Cryptomonad algae are evolutionary chimaeras of two phylogenetically distinct unicellular eukaryotes
TLDR
It is shown here that Cryptomonas Φ contains two phylogenetically separate, nuclear-type small-subunit rRNA genes, both of which are transcriptionally active and infer the evolutionary ancestry of the host and symbiont components of Cryptomona Φ. Expand
Multiple evolutionary origins of prochlorophytes, the chlorophyllb-containing prokaryotes
TLDR
Molecular sequence data indicate that the known prochlorophyte lineages do not include the direct ancestor of chloroplasts, and are shown to be a highly diverged polyphyletic group, and the use of chlorophyll b as a light-harvesting pigment has developed independently several times in evolution. Expand
The evolution of algal chloroplasts
TLDR
The present understanding of how chloroplasts evolved in the different groups of algae is summed up in this symposium presentation. Expand
Nucleotide sequence of the gene for the large subunit of Rubisco from Cyanophora paradoxa—phylogenetic implications
TLDR
The cloned gene (rbcL) for the large subunit (LSU) of Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) from Cyanophora paradoxa was cloned and the nucleotide sequence determined to support the hypothesis that the cyanelles of cyanophora may represent a closely related, but independent, side line to chloroplast evolution. Expand
Sequence analysis and phylogenetic reconstruction of the genes encoding the large and small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase from the chlorophyllb-containing prokaryoteProchlorothrix hollandica
TLDR
Phylogenetic analyses of Prochlorothrix using Wagner parsimony analysis of deduced amino acid sequences indicate that the species is more closely related to cyanobacteria than to the green plastid lineage. Expand
...
1
2
3
4
5
...