Taxonomy and molecular phylogeny of three marine benthic species of <i>Haslea</i> (Bacillariophyceae), with transfer of two species to <i>Navicula</i>

Li, Yuhang; Chen, Xumiao; Sun, Zhan-Li; Xu, Kuidong

doi:10.1080/0269249x.2017.1401008

Cited by 18 publications

(18 citation statements)

References 23 publications

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“…Apart from the clade of blue diatoms, two major clades can be observed in the tree. The clade sister to the blue Haslea clade contains non-blue species whose classification has reached a consensus ( Haslea pseudostrearia Massé, Rincé and Cox, Haslea nipkowii (Meister) M.Poulin and G.Massé, Haslea feriarum M.A.Tiffany and F.A.S.Sterrenburg, Haslea vitrea (Cleve) Simonsen, Haslea crucigeroides (Hustedt) Simonsen, and Haslea arculata Lobban and Ashworth) [ 42 , 43 , 44 , 45 ]. The third major clade contains the species of pennate diatoms which were meant to be the outgroup (e.g., Trachyneis sp.)…”

Section: Resultsmentioning

confidence: 99%

“…The third major clade contains the species of pennate diatoms which were meant to be the outgroup (e.g., Trachyneis sp.) as well as numerous species listed as Haslea spp., but whose exact identities and classification have been recently linked to Navicula sensu lato [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

“…The tree inferred from the rbcL sequences of 40 diatoms displays a strongly supported clade (96% bootstrap support) containing all five Haslea species that are able to produce a blue pigment (H. silbo, H. nusantara, H. provincialis, H. karadagensis, and H. ostrearia) (Figure 18). [42][43][44][45]. The third major clade contains the species of pennate diatoms which were meant to be the outgroup (e.g., Trachyneis sp.)…”

Section: Phylogenymentioning

confidence: 99%

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Haslea silbo, A Novel Cosmopolitan Species of Blue Diatoms

Gastineau

Hansen

Poulin

et al. 2021

Biology

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Specimens of a new species of blue diatoms from the genus Haslea Simonsen were discovered in geographically distant sampling sites, first in the Canary Archipelago, then North Carolina, Gulf of Naples, the Croatian South Adriatic Sea, and Turkish coast of the Eastern Mediterranean Sea. An exhaustive characterization of these specimens, using a combined morphological and genomic approach led to the conclusion that they belong to a single new to science cosmopolitan species, Haslea silbo sp. nov. A preliminary characterization of its blue pigment shows similarities to marennine produced by Haslea ostrearia, as evidenced by UV–visible spectrophotometry and Raman spectrometry. Life cycle stages including auxosporulation were also observed, providing data on the cardinal points of this species. For the two most geographically distant populations (North Carolina and East Mediterranean), complete mitochondrial and plastid genomes were sequenced. The mitogenomes of both strains share a rare atp6 pseudogene, but the number, nature, and positions of the group II introns inside its cox1 gene differ between the two populations. There are also two pairs of genes fused in single ORFs. The plastid genomes are characterized by large regions of recombination with plasmid DNA, which are in both cases located between the ycf35 and psbA genes, but whose content differs between the strains. The two sequenced strains hosts three plasmids coding for putative serine recombinase protein whose sequences are compared, and four out of six of these plasmids were highly conserved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Phylogenymentioning

confidence: 99%

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Haslea silbo, A Novel Cosmopolitan Species of Blue Diatoms

Gastineau

Hansen

Poulin

et al. 2021

Biology

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“…The strain CNS00413 was annotated as Pleurosigma sp. (98.31% PID with AY485514) ( Damste et al, 2004 ), while the strain CNS00432, which had a “sandwich-type” valve structure, was annotated as Haslea tsukamotoi (99.61% PID with KY937691) ( Li et al, 2017 ). The strain CNS00514, whose cells had protrusions at the ends that connected the cells into a curved chain, was annotated as Hemiaulus sinensis (100% PID with HQ912624) ( Theriot et al, 2010 ).…”

Section: Resultsmentioning

confidence: 99%

Diatom Biodiversity and Speciation Revealed by Comparative Analysis of Mitochondrial Genomes

et al. 2022

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Diatoms (Bacillariophyta) constitute one of the most diverse and ecologically significant groups of phytoplankton, comprising 100,000–200,000 species in three classes Bacillariophyceae, Mediophyceae, and Coscinodiscophyceae. However, due to the limited resolution of common molecular markers including 18S rDNA, 28S rDNA, ITS, rbcL, and cox1, diatom biodiversity has not been adequately ascertained. Organelle genomes including mitochondrial genomes (mtDNAs) have been proposed to be “super barcodes” for distinguishing diatom species because of their rich genomic content, and the rapid progress of DNA sequencing technologies that has made it possible to construct mtDNAs with increasing throughout and decreasing cost. Here, we constructed complete mtDNAs of 15 diatom species including five Coscinodiscophyceae species (Guinardia delicatula, Guinardia striata, Stephanopyxis turris, Paralia sulcata, and Actinocyclus sp.), four Mediophyceae species (Hemiaulus sinensis, Odontella aurita var. minima, Lithodesmioides sp., and Helicotheca tamesis), and six Bacillariophyceae species (Nitzschia ovalis, Nitzschia sp., Nitzschia traheaformis, Cylindrotheca closterium, Haslea tsukamotoi, and Pleurosigma sp.) to test the practicality of using mtDNAs as super barcodes. We found that mtDNAs have much higher resolution compared to common molecular markers as expected. Comparative analysis of mtDNAs also suggested that mtDNAs are valuable in evolutionary studies by revealing extensive genome rearrangement events with gene duplications, gene losses, and gains and losses of introns. Synteny analyses of mtDNAs uncovered high conservation among species within an order, but extensive rearrangements including translocations and/or inversions between species of different orders within a class. Duplication of cox1 was discovered for the first time in diatoms in Nitzschia traheaformis and Haslea tsukamotoi. Molecular dating analysis revealed that the three diatom classes split 100 Mya and many diatom species appeared since 50 Mya. In conclusion, more diatom mtDNAs representing different orders will play great dividends to explore biodiversity and speciation of diatoms in different ecological regions.

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“…With this implication, the genus became morphologically very highly diverse group, including 37 species. Li et al, (2017) as a result of molecular phylogeny and ultrastructual study, however, stated that some of these belong in Navicula genus and the real synapomorphic character of the true Haslea species is "sandwich" structure. At the final context, the genus Haslea needs more ultrastructural and molecular data.…”

Section: Resultsmentioning

confidence: 99%

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Baytut¹,

Gümüş²,

Ersanli³

2018

GenAqua

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The aim of this study was to identify diatoms from the Southern Black Sea. Water samples were collected using a plankton net with 22 μm pores. Diatom cells were investigated under a light microscope and were then isolated for the single-cell PCR procedure. Phylogenetic inference showed that the isolates collected from the study area were affiliated with a naviculoid diatom Haslea howeana. We have reported the first molecular data concerning these species from the Black Sea and have contributed a new species record for the Turkish Algal Flora.

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Taxonomy and molecular phylogeny of three marine benthic species of Haslea (Bacillariophyceae), with transfer of two species to Navicula

Cited by 18 publications

References 23 publications

Haslea silbo, A Novel Cosmopolitan Species of Blue Diatoms

Haslea silbo, A Novel Cosmopolitan Species of Blue Diatoms

Diatom Biodiversity and Speciation Revealed by Comparative Analysis of Mitochondrial Genomes

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