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Vieira C, Kim MS, Zubia M. French Polynesian Scytosiphonaceae (Ectocarpales, Phaeophyceae): A combined molecular and morphological approach to their diversity and systematics. J Phycol 2024; 60:447-464. [PMID: 38310617 DOI: 10.1111/jpy.13432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 02/06/2024]
Abstract
This study revisited the taxonomy and diversity of brown macroalgae within the Scytosiphonaceae family in French Polynesia, which had previously been recognized as encompassing only six species. Using the chloroplast and mitochondrial genes rbcL, psbA, and cox3 as molecular markers in conjunction with morpho-anatomical observations, we unveiled the presence of 11 species spanning six genera: Chnoospora minima, Colpomenia claytoniae, Co. sinuosa [groups IIIa and IIIb], Hydroclathrus rapanuii, H. tenuis, H. tilesii, Manzaea minuta, Pseudochnoospora implexa, Rosenvingea australis, and the newly described species R. polynesiensis sp. nov. and R. tahitiensis sp. nov. This encompasses the recognition of two previously unreported genera in this region: Manzaea and Pseudochnoospora. Sequences were successfully acquired for four taxa that had been documented previously, while the absence of sequences for H. clathratus and H. tumulis in French Polynesia raises queries about their presence in this region. With these additions, the total species count now stands at 13 (including H. clathratus and H. tumulis), one being an endemic species. The molecular-assisted alpha taxonomic approach used here allowed for a critical revision of the Scytosiphonaceae species checklist for French Polynesia. The diversity revealed in this region accounts for a substantial 20% of the family's global diversity. Additionally, our study presents an updated species-level phylogeny for the Scytosiphonaceae.
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Affiliation(s)
- Christophe Vieira
- Research Institute for Basic Sciences, Jeju National University, Jeju, Korea
| | - Myung Sook Kim
- Research Institute for Basic Sciences, Jeju National University, Jeju, Korea
| | - Mayalen Zubia
- UMR EIO (UPF-IRD-ILM-IFREMER) Université de la Polynésie française, Tahiti, French Polynesia
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Jeong SY, Nelson WA, Sutherland JE, Peña V, Le Gall L, Diaz-Pulido G, Won BY, Cho TO. Corallinapetrales and Corallinapetraceae: A new order and family of coralline red algae including Corallinapetra gabrielii comb. nov. J Phycol 2021; 57:849-862. [PMID: 33305368 DOI: 10.1111/jpy.13115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 10/26/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
The coralline algal genus Corallinapetra is currently monospecific and was established on the species Corallinapetra novaezelandiae, known from a single collection from north-eastern New Zealand. On the basis of multi-gene phylogenetic analyses, Corallinapetra has been resolved apart from all currently recognized families and orders within the Corallinophycidae. We analyzed DNA sequence data from the holotype of Lithothamnion gabrielii, which has been considered a heterotypic synonym of L. muelleri, and an unidentified sample collected from Stewart Island in New Zealand, using psbA, rbcL, and COI-5P genes. We also observed detailed morpho-anatomical characters with light and scanning electron microscopy. Our phylogenetic analyses showed that L. gabrielii and the sample from New Zealand belonged to the same clade as Corallinapetra, distinct from other families and orders in the Corallinophycidae. Members of this clade are distinguishable from other families and orders in the Corallinophycidae by possessing sporangia that are surrounded by remnant sterile filaments that are weakly calcified in mature multiporate sporangial conceptacles that produce zonately divided tetrasporangia. Therefore, we propose that Corallinapetra be placed in its own family, Corallinapetraceae and order, Corallinapetrales, and that L. gabrielii should be assigned to Corallinapetra, as C. gabrielii, to reflect their phylogenetic relationships. We also obtained a partial rbcL sequence data from the lectotype of L. muelleri, the generitype of Lithothamnion. Comparison of the L. muelleri type sequence with L. gabrielii unambiguously demonstrated that these two species are not conspecific, and confirm the placement of L. muelleri within the Hapalidiales.
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Affiliation(s)
- So Young Jeong
- Australian Rivers Institute-Coast & Estuaries and School of Environment and Science, Nathan Campus, Griffith University, Brisbane, QLD, 4111, Australia
- Department of Life Science, Chosun University, Gwangju, 61452, Korea
| | - Wendy A Nelson
- National Institute of Water and Atmospheric Research, Private Bag 14-901, Wellington, 6241, New Zealand
- School of Biological Sciences, University of Auckland, Private Bag 92-019, Auckland, 1142, New Zealand
| | - Judith E Sutherland
- National Institute of Water and Atmospheric Research, Private Bag 14-901, Wellington, 6241, New Zealand
| | - Viviana Peña
- BIOCOST Research Group, Departamento de Bioloxía, Facultade de Ciencias and Advanced Scientific Research Center (CICA), Universidade da Coruña, 15071 A, Coruña, Spain
| | - Line Le Gall
- Institut Systématique Evolution Biodiversité (ISYEB), Muséum National d'Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 57 rue Cuvier, CP 39, 75005, Paris, France
| | - Guillermo Diaz-Pulido
- School of Environment and Science and Australian Rivers Institute-Coast & Estuaries, Nathan Campus, Griffith University, Brisbane, QLD, 4111, Australia
| | - Boo Yeon Won
- Department of Life Science, Chosun University, Gwangju, 61452, Korea
| | - Tae Oh Cho
- Department of Life Science, Chosun University, Gwangju, 61452, Korea
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Gong S, Li Z, Zhang F, Xiao Y, Cheng H. Symbiochlorum hainanensis gen. et sp. nov. (Ulvophyceae, Chlorophyta) isolated from bleached corals living in the South China Sea. J Phycol 2018; 54:811-817. [PMID: 30137670 DOI: 10.1111/jpy.12779] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/06/2018] [Indexed: 05/19/2023]
Abstract
Light/scanning electron/transmission microscopy-based morphological analyses and multiple nucleotide sequences-based molecular phylogenetic analyses are used to identify and assess the phylogenetic position of a new unidentified green alga isolated from bleached corals living in the South China Sea. This new unidentified green alga is a unicellular marine alga and has uninucleate vegetative cells and multiple chloroplasts with a pyrenoid. It can form aplanosporangium covered by cell walls and reproduces by releasing autospore. These features differ substantially from those of the two genera Ignatius and Pseudocharacium. Those two genera have been accommodated in the Ignatius clade. Nucleotide sequences of the nuclear small subunit ribosomal RNA gene (18S rRNA), internal transcribed spacer 2 of ribosomal RNA gene (ITS2) and ribulose-1,5 bisphosphate carboxylase/oxygenase large subunit gene (rbcL, partial) are obtained and compared with published green algal sequences. The results from the morphology, ultrastructure, and multiple nucleotide sequences data support the placement of the new unidentified green alga in Ulvophyceae. This new unidentified isolate is described as Symbiochlorum hainanensis gen. et sp. nov., a new sister lineage to the Ignatius clade, Ulvophyceae, Chlorophyta.
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Affiliation(s)
- Sanqiang Gong
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Zhiyong Li
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Fengli Zhang
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Yilin Xiao
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
| | - Hao Cheng
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China
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Štenclová L, Fučíková K, Kaštovský J, Pažoutová M. Molecular and morphological delimitation and generic classification of the family Oocystaceae (Trebouxiophyceae, Chlorophyta). J Phycol 2017; 53:1263-1282. [PMID: 28833138 DOI: 10.1111/jpy.12581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
The family Oocystaceae (Chlorophyta) is a group of morphologically and ultrastructurally distinct green algae that constitute a well-supported clade in the class Trebouxiophyceae. Despite the family's clear delimitation, which is based on specific cell wall features, only a few members of the Oocystaceae have been examined using data other than morphological. In previous studies of Trebouxiophyceae, after the establishment of molecular phylogeny, the taxonomic status of the family was called into question. The genus Oocystis proved to be paraphyletic and some species were excluded from Oocystaceae, while a few other species were newly redefined as members of this family. We investigated 54 strains assigned to the Oocystaceae using morphological, ultrastructural and molecular data (SSU rRNA and rbcL genes) to clarify the monophyly of and diversity within Oocystaceae. Oonephris obesa and Nephrocytium agardhianum clustered within the Chlorophyceae and thus are no longer members of the Oocystaceae. On the other hand, we transferred the coenobial Willea vilhelmii to the Oocystaceae. Our findings combined with those of previous studies resulted in the most robust definition of the family to date. The division of the family into three subfamilies and five morphological clades was suggested. Taxonomical adjustments in the genera Neglectella, Oocystidium, Oocystis, and Ooplanctella were established based on congruent molecular and morphological data. We expect further taxonomical changes in the genera Crucigeniella, Eremosphaera, Franceia, Lagerheimia, Oocystis, and Willea in the future.
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Affiliation(s)
- Lenka Štenclová
- Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, 37005, Czech Republic
| | - Karolina Fučíková
- Department of Natural Sciences, Assumption College, 500 Salisbury St., Worcester, Massachusetts, 01609, USA
| | - Jan Kaštovský
- Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, 37005, Czech Republic
| | - Marie Pažoutová
- Faculty of Science, University of South Bohemia, Branišovská 31, České Budějovice, 37005, Czech Republic
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