Distribution patterns of marine planktonic cyanobacterial assemblages in transitional marine habitats using 16S rRNA phylogeny

2018 ◽  
Vol 66 (3) ◽  
pp. 189-198 ◽  
Author(s):  
Tarkeshwar Singh ◽  
Punyasloke Bhadury
Keyword(s):  
16S Rrna ◽  
Distribution Patterns ◽  
16S Rrna Phylogeny ◽  
Marine Habitats ◽  
Rrna Phylogeny

A mitochondrial 12S and 16S rRNA phylogeny of critical genera of Phoridae (Diptera) and related families of Aschiza

Zootaxa ◽  
2004 ◽  
Vol 593 (1) ◽  
pp. 1 ◽  
Author(s):  
CHARLES E. COOK ◽  
JEREMY J. AUSTIN ◽  
R. HENRY L. DISNEY
Keyword(s):  
Phylogenetic Analysis ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Monophyletic Group ◽  
Rrna Gene ◽  
Gene Sequences ◽  
16S Rrna Gene Sequences ◽  
16S Rrna Phylogeny ◽  
Rrna Phylogeny

Phylogenetic analysis of mitochondrial 12S and 16S rRNA gene sequences supports the monophyly of the Phoridae. Within this family the Phorinae clade includes two aberrant termitophilous subfamilies, the Thaumatoxeninae and the Termitoxeniinae, which cluster with Dohrniphora and Diplonevra. These two genera include termitophiles and parasitoids of termites, so we hypothesize that these termitophilous phorids are a monophyletic group. While the data neither refute nor support the assumed monophyly of the Metopininae, the genera of this subfamily were not monophyletic in our analysis, but fell into two subclades that correspond with the tribes Metopinini and Gymnophorini.

scholarly journals 16S rRNA Phylogeny of Sponge-Associated Cyanobacteria

2005 ◽  
Vol 71 (7) ◽  
pp. 4127-4131 ◽  
Author(s):  
Laura Steindler ◽  
Dorothée Huchon ◽  
Adi Avni ◽  
Micha Ilan
Keyword(s):  
16S Rrna ◽  
Phylogenetic Analyses ◽  
16S Rrna Phylogeny ◽  
Rrna Phylogeny ◽  
Rrna Sequences ◽  
16S Rrna Sequences

ABSTRACT Phylogenetic analyses of 16S rRNA sequences of sponge-associated cyanobacteria showed them to be polyphyletic, implying that they derived from multiple independent symbiotic events. Most of the symbiont sequences were affiliated to a group of Synechococcus and Prochlorococcus species. However, other symbionts were related to different groups, such as the Oscillatoriales.

scholarly journals Genome Sequence of the Marine Alphaproteobacterium HTCC2150, Assigned to the Roseobacter Clade

2010 ◽  
Vol 192 (23) ◽  
pp. 6315-6316 ◽  
Author(s):  
Ilnam Kang ◽  
Hyun-Myung Oh ◽  
Kevin L. Vergin ◽  
Stephen J. Giovannoni ◽  
Jang-Cheon Cho
Keyword(s):  
16S Rrna ◽  
Genome Sequence ◽  
Marine Bacterium ◽  
Roseobacter Clade ◽  
Metabolic Potential ◽  
Oregon Coast ◽  
16S Rrna Phylogeny ◽  
Close Relationship ◽  
Rrna Phylogeny

ABSTRACT Here we announce the genome sequence of a marine bacterium, HTCC2150, that was isolated off the Oregon coast using dilution-to-extinction culturing and that is affiliated with the Roseobacter clade. The 16S rRNA phylogeny showed that the strain was closely related to members of the RCA clade. The genome sequence suggests that strain HTCC2150 is an organoheterotroph carrying diverse metabolic potential, including a close relationship with phytoplankton.

scholarly journals Diversity and distribution patterns of the Oligocene and Miocene decapod crustaceans (Crustacea: Malacostraca) of the Western and Central Paratethys

2016 ◽  
Vol 67 (5) ◽  
pp. 471-494 ◽  
Author(s):  
Matúš Hyžný
Keyword(s):  
Spatial Scales ◽  
Three Dimensional ◽  
Decapod Crustacean ◽  
Distribution Patterns ◽  
Mediterranean Area ◽  
Homogeneous Distribution ◽  
Decapod Crustaceans ◽  
Central Paratethys ◽  
The North ◽  
Marine Habitats

AbstractDecapod associations have been significant components of marine habitats throughout the Cenozoic when the major diversification of the group occurred. In this respect, the circum-Mediterranean area is of particular interest due to its complex palaeogeographic history. During the Oligo-Miocene, it was divided in two major areas, Mediterranean and Paratethys. Decapod crustaceans from the Paratethys Sea have been reported in the literature since the 19thcentury, but only recent research advances allow evaluation of the diversity and distribution patterns of the group. Altogether 176 species-level taxa have been identified from the Oligocene and Miocene of the Western and Central Paratethys. Using the three-dimensional NMDS analysis, the composition of decapod crustacean faunas of the Paratethys shows significant differences through time. The Ottnangian and Karpatian decapod associations were similar to each other both taxonomically and in the mode of preservation, and they differed taxonomically from the Badenian ones. The Early Badenian assemblages also differed taxonomically from the Late Badenian ones. The time factor, including speciation, immigration from other provinces and/or (local or global) extinction, can explain temporal differences among assemblages within the same environment. High decapod diversity during the Badenian was correlated with the presence of reefal settings. The Badenian was the time with the highest decapod diversity, which can, however, be a consequence of undersampling of other time slices. Whereas the Ottnangian and Karpatian decapod assemblages are preserved virtually exclusively in the siliciclastic “Schlier”-type facies that originated in non-reefal offshore environments, carbonate sedimentation and the presence of reefal environments during the Badenian in the Central Paratethys promoted thriving of more diverse reef-associated assemblages. In general, Paratethyan decapods exhibited homogeneous distribution during the Oligo-Miocene among the basins in the Paratethys. Based on the co-occurrence of certain decapod species, migration between the Paratethys and the North Sea during the Early Miocene probably occurred via the Rhine Graben. At larger spatial scales, our results suggest that the circum-Mediterranean marine decapod taxa migrated in an easterly direction during the Oligocene and/or Miocene, establishing present-day decapod communities in the Indo-West Pacific.

Description of a new marine planktonic cyanobacterial species Synechococcus moorigangaii (Order Chroococcales) from Sundarbans mangrove ecosystem

Phytotaxa ◽  
2019 ◽  
Vol 393 (3) ◽  
pp. 263 ◽  
Author(s):  
TARKESHWAR SINGH ◽  
PUNYASLOKE BHADURY
Keyword(s):  
New Species ◽  
16S Rrna ◽  
Model Organism ◽  
Nitrogen Sources ◽  
Mangrove Ecosystem ◽  
Fatty Acid Analysis ◽  
Ammonium Ion ◽  
Cyanobacterial Species ◽  
Rrna Phylogeny ◽  
A New Species

The genus Synechococcus is widespread across marine environments globally including in coastal habitats. In this study, culture of a new isolate (CMS01) of Synechococcus has been established and described based on polyphasic taxonomy from the world’s largest mangrove ecosystem, Sundarbans. This planktonic photoautrotroph has been proposed as a new species Synechococcus moorigangaii sp. nov. belonging to the order Chroococcales. The cells representing this proposed new species are solitary and can also form chain comprising of 4–6 cells. The shape of cell is oval to cylindrical and length ranges from 1.2–3 µm while the width ranges from 0.8–2 µm. The distribution pattern of photosynthetic filaments was found to be from the periphery of cell. Based on robust phylogeny of 16S rRNA, in addition to functional genes such as psbA, ureC, rbcL, and cbbA (multi gene phylogeny), the proposed new species differed from closest described species of Synechococcus under order Chroococcales. The fatty acid analysis indicated the presence of C12 and C14 chain fatty acids exclusive to isolate CMS01. The new isolate can grow across a range of salinity and in presence of different nitrogen sources. It has the ability to fix atmospheric di-nitrogen into ammonium ion. This new isolate of Synechococcus spp. is the first marine planktonic cyanobacterium described from a mangrove ecosystem and characterized using polyphasic approaches. Based on 16S rRNA phylogeny, this proposed new species clustered with Synechococcus strains PCC 7117, PCC 73109, PCC 7002, PCC 7003, PCC 7376 and NKNG15041c belonging to the order Chroococcales. The new species Synechococcus moorigangaii sp. nov. can serve as a model organism to understand ecophysiology and adaptation of planktonic cyanobacterial communities in mangrove ecosystems.

scholarly journals Sulfurihydrogenibium azorense, sp. nov., a thermophilic hydrogen-oxidizing microaerophile from terrestrial hot springs in the Azores

2004 ◽  
Vol 54 (1) ◽  
pp. 33-39 ◽  
Author(s):  
P. Aguiar ◽  
T. J. Beveridge ◽  
A.-L. Reysenbach
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Elemental Sulfur ◽  
Hot Springs ◽  
Rrna Gene ◽  
Temperature Growth ◽  
Likelihood Analysis ◽  
Distinct Lineage ◽  
Terrestrial Hot Springs ◽  
Rrna Phylogeny

Five hydrogen-oxidizing, thermophilic, strictly chemolithoautotrophic, microaerophilic strains, with similar (99–100 %) 16S rRNA gene sequences were isolated from terrestrial hot springs at Furnas, São Miguel Island, Azores, Portugal. The strain, designated Az-Fu1T, was characterized. The motile, 0·9–2·0 μm rods were Gram-negative and non-sporulating. The temperature growth range was from 50 to 73 °C (optimum at 68 °C). The strains grew fastest in 0·1 % (w/v) NaCl and at pH 6, although growth was observed from pH 5·5 to 7·0. Az-Fu1T can use elemental sulfur, sulfite, thiosulfate, ferrous iron or hydrogen as electron donors, and oxygen (0·2–9·0 %, v/v) as electron acceptor. Az-Fu1T is also able to grow anaerobically, with elemental sulfur, arsenate and ferric iron as electron acceptors. The Az-Fu1T G+C content was 33·6 mol%. Maximum-likelihood analysis of the 16S rRNA phylogeny placed the isolate in a distinct lineage within the Aquificales, closely related to Sulfurihydrogenibium subterraneum (2·0 % distant). The 16S rRNA gene of Az-Fu1T is 7·7 % different from that of Persephonella marina and 6·8 % different from Hydrogenothermus marinus. Based on the phenotypic and phylogenetic characteristics presented here, it is proposed that Az-Fu1T belongs to the recently described genus Sulfurihydrogenibium. It is further proposed that Az-Fu1T represents a new species, Sulfurihydrogenibium azorense.

Description of Stenomitos kolaenensis and S. hiloensis sp. nov. (Leptolyngbyaceae, Cyanobacteria) with an emendation of the genus

Phytotaxa ◽  
2020 ◽  
Vol 440 (2) ◽  
pp. 108-128 ◽  
Author(s):  
SERGEI SHALYGIN ◽  
REGINA R. SHALYGINA ◽  
VERA V. REDKINA ◽  
CORY B. GARGAS ◽  
JEFFREY R. JOHANSEN
Keyword(s):  
Phylogenetic Analyses ◽  
Its Region ◽  
Rrna Gene ◽  
16S Rrna Phylogeny ◽  
Murmansk Region ◽  
Two New Species ◽  
Its Regions ◽  
Rrna Phylogeny ◽  
Its Rrna ◽  
Cyanobacterial Genus

Stenomitos is a recently established cyanobacterial genus, some species of which appear to be cryptic. Here we describe two new species in this genus, Stenomitos kolaensis sp. nov. isolated from the Al-Fe humic podzols of a boreal forest near Nikel town, Murmansk region, Russia and S. hiloensis sp. nov. isolated from a basaltic seep wall on Akeola Road, Hilo, Hawaii, USA. Phylogenetic analyses were conducted on the 16S and 16S-23S ITS rRNA gene regions using Bayesian Inference, and Maximum Likelihood. Phylogenetic analysis of the 16S-23S ITS rRNA region resulted in both S. kolaensis and S. hiloensis forming separate clades from other Stenomitos lineages. Antarctic strains of Stenomitos frigidus (previously reported as “Leptolyngbya frigida”) show that species to be polyphyletic and in need of revision. The structure of the conserved ITS regions (Box-B, D1-D1ʹ, V2 and V3 helices) provided support for separation of the species, and the p-distances among aligned ITS regions further confirmed that a number of species exist within the genus. S. kolaensis and S. hiloensis can be distinguished from other described Stenomitos species (S. rutilans and S. tremulus) by their geographical distribution, habitat preference, 16S rRNA phylogeny, and differences in the secondary structure of the 16S-23S ITS region.

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