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Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic and taxonomic implications

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Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic and

taxonomic implications

Romain Gastineau, So-Yeon Kim, Claude Lemieux, Monique Turmel, Andrzej Witkowski, Jong-Gyu Park, Byoung-Seok Kim, David Mann, Edward Theriot

To cite this version:

Romain Gastineau, So-Yeon Kim, Claude Lemieux, Monique Turmel, Andrzej Witkowski, et al..

Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic

and taxonomic implications. Mitochondrial DNA Part B Resources, Taylor & Francis Online, 2018, 4

(1), pp.25-26. �10.1080/23802359.2018.1535852�. �hal-02101160�

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Mitochondrial DNA Part B

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ISSN: (Print) 2380-2359 (Online) Journal homepage: http://www.tandfonline.com/loi/tmdn20

Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic and taxonomic implications

Romain Gastineau, So-Yeon Kim, Claude Lemieux, Monique Turmel, Andrzej Witkowski, Jong-Gyu Park, Byoung-Seok Kim, David G. Mann & Edward C.

Theriot

To cite this article: Romain Gastineau, So-Yeon Kim, Claude Lemieux, Monique Turmel, Andrzej Witkowski, Jong-Gyu Park, Byoung-Seok Kim, David G. Mann & Edward C. Theriot (2019) Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic and taxonomic implications, Mitochondrial DNA Part B, 4:1, 25-26, DOI:

10.1080/23802359.2018.1535852

To link to this article: https://doi.org/10.1080/23802359.2018.1535852

© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Published online: 25 Nov 2018.

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MITOGENOME ANNOUNCEMENT

Complete mitochondrial genome of a rare diatom (Bacillariophyta) Proschkinia and its phylogenetic and taxonomic implications

Romain Gastineaua, So-Yeon Kimb, Claude Lemieuxc, Monique Turmelc, Andrzej Witkowskia, Jong-Gyu Parkd, Byoung-Seok Kimd, David G. Manne,fand Edward C. Theriotg

aPalaeoceanology Unit, Faculty of Geosciences, and Natural Sciences Research and Educational Centre, University of Szczecin, Szczecin, Poland;bDepartment of Oceanography, College of Ocean Science & Technology, Kunsan National University, Republic of Korea;

cDepartement de biochimie, de microbiologie et de bio-informatique, Institut de Biologie Integrative et des Systemes, Universite Laval, Quebec, Quebec, Canada;dFaculty of Marine Applied Biosciences, College of Ocean Science & Technology, Kunsan National University, Gunsan, Republic of Korea;eRoyal Botanic Garden Edinburgh, Edinburgh, Scotland, UK;fInstitute of Agriculture and Food Research and Technology (IRTA), Sant Carles de la Rapita, Spain;gDepartment of Integrative Biology, University of Texas at Austin, Austin, TX, USA

ABSTRACT

We obtained the complete mitogenome ofProschkinia sp. strain SZCZR1824, a strain belonging to a poorly known diatom genus with no previous molecular data. This genome is 48,863 bp long, with two group I introns inrnland three group II introns incox1. Using mitogenomic data, Proschkiniasp. was recovered with Fistulifera solaris, far distant from Navicula and Nitzschia, two genera with which Proschkiniahas sometimes been associated based on morphology.

ARTICLE HISTORY Received 29 August 2018 Accepted 19 September 2018 KEYWORDS

Diatoms; fistula; multigene phylogeny; mitogenome;

Proschkinia

Proschkinia is a rare genus of diatom of controversial higher classification. Originally classified as a relative ofNitzschia on the basis of light microscopy (Karayeva 1978), Proschkinia is now classified within its own family, Proschkiniaceae (Round et al. 1990), within the Naviculales, without any specific hypothesis as to its relationship with other Naviculales.

Additional SEM studies failed to further resolve you need the relationship of Proschkinia (Brogan and Rosowski 1988; Cox 1988,2012).

We sequenced the complete mitochondrial genome of Proschkinia sp. strain SZCZR1824, a strain displaying similar- ities withProschkinia complanatoides, and created a compara- tive data set from this and published diatom mitochondrial genes in order to better resolve the phylogenetic position of Proschkinia.

Proschkinia sp. strain SZCZR1824, originating from Padori Beach on the Yellow Sea coast of Korea (3644015.000N, 12607049.700E) was obtained from Kunsan National University (Korea). Total DNA was extracted following Doyle and Doyle (1990). Paired-end sequencing (150 bp) was conducted by the Beijing Genomic Institute (Shenzhen) on HiSeq 4000, with inserts of 300 bp, for a total of ca. 30 million reads. Assembly was performed using Ray 2.3.1 (Boisvert et al.2010) with a k- mer of 35. Gene identification was done using custom tools developed at Laval University (Gagnon2004).

A permanent slide with cleaned frustules of SZCZR1824 is kept in the collection of the University of Szczecin.

Frozen DNA and pellets of cells are also being stored in Szczecin at20C.

The mitogenome ofProschkiniasp. SZCZR1824 (MH800316) is 48,863 bp long and encodes two rRNAs, 22 tRNAs and 33 proteins, for a total of 57 gene products. In addition, there are two free-standing open reading frames (orf143 and orf243) with no obvious function. The large subunit rRNA gene (rnl) is interrupted by two group I introns, whereas cox1 is inter- rupted by three large group II introns. Each of thecox1introns contains a putative reverse transcriptase gene (orf714, orf789 and orf1002) and BlastP searches using these gene products as queries identified putative diatom proteins encoded by cox1introns: YP_009495514 (Psammoneis japonica) for orf714, YP_009144752 (Pseudo-nitzschia multiseries) for orf789 and AVR57660 (Halamphorasp.) for orf1002.

A maximum-likelihood phylogenetic analysis was per- formed on a concatenated data set of cox1, cox2, cox3, cob, nad2, nad4, nad5, and nad11 from 16 diatoms using RAxML 8.2.12 (Stamatakis2014).Proschkinia sp. was recovered as sis- ter to Fistulifera solaris (Figure 1), which was previously placed in the Stauroneidaceae (Cox 2015) or Naviculaceae (NCBI taxonomy, accessed 25 August 2018) in the Naviculales. These two species formed a larger, strongly sup- ported clade with Berkeleya fennica (Berkeleyales) and Didymosphenia geminata (Cymbellales). Bacillariales species (Nitzschia, Pseudo-nitzschia and Cylindrotheca) and Navicula ramosissima are separated by several nodes fromProschkinia, a result incongruent with the taxonomic placements reported

CONTACTRomain Gastineau gastineauromain@yahoo.fr Uniwersytet Szczecinski, Faculty of geosciences, Ul. Mickiewicza 16a, Szczecin 70-453, Poland ß2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

MITOCHONDRIAL DNA PART B 2018, VOL. 4, NO. 1, 2526

https://doi.org/10.1080/23802359.2018.1535852

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for the latter diatom by Karayeva (1978) and Round et al.

(1990). Fistulifera, like Proschkinia, possesses a special struc- ture, called a ‘fistula’, between the raphe slots at the valve center (Lange-Bertalot 1997; Zgrundo et al. 2013). Based on this shared feature and the mitochondrial phylogeny pre- sented here, we propose that Fistulifera and Proschkinia belong to the same family, Proschkiniaceae.

Disclosure statement

The authors report no conflict of interest. The authors alone are respon- sible for the content and writing of this article.

Funding

European Commission Horizon 2020 Research and Innovation Programme GHaNA (The Genus Haslea, New marine resources for blue biotechnology and Aquaculture, grant agreement No [734708/GHANA/

H2020-MSCA-RISE-2016]). Funding from Polish Ministry of Science, Topical Subsidy to the University of Szczecin. Project Maestro from National Science Centre in Cracow - 2012/04/A/ST10/00544Grant from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR201839201 and NIBR201801205).

References

Boisvert S, Laviolette F, Corbeil J. 2010. Ray: simultaneous assembly of reads from a mix of high-throughput sequencing technologies. J Comput Biol. 17:15191533.

Brogan MW, Rosowski JR. 1988. Frustular morphology and taxonomic affinities of Navicula complanatoides(Bacillariophyceae). J Phycol. 24:

262273.

Cox EJ. 1988. Taxonomic studies on the diatom genus Navicula V. The establishment of Parlibellusgen. nov. for some members ofNavicula sect. Microstigmaticae. Diat Res. 3:938.

Cox EJ. 2012. Ontogeny, homology, and terminology-wall morphogenesis as an aid to character recognition and character state definition for pennate diatom systematics. J Phycol. 48:131.

Cox EJ. 2015. Diatoms, Diatomeae (Bacillariophyceae s.l., Bacillariophyta).

In: Frey W, editor. Syllabus of plant families. A. Englers Syllabus der Pflanzenfamilien, 13th ed. Part 2/1: Photoautotrophic Eukaryotic Algae. Glaucocystophyta, Cryptophyta, Dinophyta/Dinozoa, Haptophyta, Heterokontophyta/Ochrophyta, Chlorarachniophyta/

Cercozoa, Euglenophyta/Euglenozoa, Chlorophyta, Streptophyta p.p.

Stuttgart: Borntraeger Science Publishers; p. 64103.

Doyle JJ, Doyle JL. 1990. Isolation of plant DNA from fresh tissue. Focus.

12:1315.

Gagnon J. 2004. Creation doutils pour lautomatisation danalyses phy- logenetiques de genomes dorganites [Development of bioinformatic tools for the phylogenetic analyzes of organellar genomes] [M.Sc. dis- sertation]. University of Laval.

Karayeva NI. 1978. Novyi podporyadok diatomovykh vodoroslei (a new suborder of diatoms). Botanischeskii Zhurnal. 63:17471750.

Lange-Bertalot H. 1997.Frankophila, MayamaeaundFistulifera: drei neue Gattungen der Klasse Bacillariophyceae. Archiv Protisten. 148:6576.

Round FE, Crawford RM, Mann DG. 1990. The diatoms Biology and morphology of the genera. Cambridge: Cambridge University Press;

pp. [iix], 1747.

Stamatakis A. 2014. RAxML Version 8: a tool for phylogenetic analysis and post-analysis of large phylogenies. Bioinformatics. 30:13121313.

Zgrundo A, Lemke P, Pniewski F, Cox EJ, Latała A. 2013. Morphological and molecular phylogenetic studies onFistulifera saprophila. Diat Res.

28:431443.

Figure 1. Maximum likelihood phylogeny obtained on concatenated mitochondrial genes (cox1,cox2,cox3,cob,nad2,nad4,nad5, andnad11) ofProschkiniasp.

and other diatoms, withThalassiosira pseudonanabeing the outgroup. Numbers next to nodes are support values obtained after 100 bootstrap replicates.

26 R. GASTINEAU ET AL.

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