Rappemonads are haptophyte phytoplankton
| Autor: | Motoki Kayama, Richard N. Pienaar, Hideaki Miyashita, Takuro Nakayama, Masanobu Kawachi, Isao Inouye, Othman Bojo, Lesley Rhodes, Mami Nomura, Ryoma Kamikawa, Stuart D. Sym, Ian Probert |
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| Přispěvatelé: | National Institute for Environmental Studies (NIES), Kyoto University [Kyoto], Tohoku University [Sendai], Université de Tsukuba = University of Tsukuba, Universiti Malaysia Sarawak (UNIMAS), Cawthron Institute, University of the Witwatersrand [Johannesburg] (WITS), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Lineage (evolution) environmental DNA sequences Haptophyta General Biochemistry Genetics and Molecular Biology boats Haptophyte 03 medical and health sciences 0302 clinical medicine boats.ship_class RNA Ribosomal 16S transmission electron microscopy Environmental DNA 14. Life underwater Plastids organellar phylogenomics Phylogeny biology Phylogenetic tree fungi biology.organism_classification 030104 developmental biology Prymnesium parvum Sister group phytoplankton diversity Prymnesiophyceae Evolutionary biology morphological evolution Phytoplankton [SDE]Environmental Sciences General Agricultural and Biological Sciences 030217 neurology & neurosurgery |
| Zdroj: | Current Biology-CB Current Biology-CB, Elsevier, 2021, 31 (11), pp.2395-2403.e4. ⟨10.1016/j.cub.2021.03.012⟩ |
| ISSN: | 0960-9822 1879-0445 |
| Popis: | Rapidly accumulating genetic data from environmental sequencing approaches have revealed an extraordinary level of unsuspected diversity within marine phytoplankton, which is responsible for around 50% of global net primary production.However, the phenotypic identity of many of the organisms distinguished by environmental DNA sequences remains unclear. The rappemonads represent a plastid-bearing protistan lineage that to date has only been identified by environmental plastid 16S rRNA sequences.The phenotypic identity of this group, which does not confidently cluster in any known algal clades in 16S rRNA phylogenetic reconstructions, has remained unknown since the first report of environmental sequences over two decades ago. We show that rappemonads are closely related to a haptophyte microalga, Pavlomulina ranunculiformis gen. nov. et sp. nov., and belong to a new haptophyte class, the Rappephyceae. Organellar phylogenomic analyses provide strong evidence for the inclusion of this lineage within the Haptophyta as a sister group to the Prymnesiophyceae. Members of this new class have a cosmopolitan distribution in coastal and oceanic regions. The relative read abundance of Rappephyceae in a large environmental barcoding dataset was comparable to, or greater than, those of major haptophyte species, such as the bloom-forming Gephyrocapsa huxleyi and Prymnesium parvum, and this result indicates that they likely have a significant impact as primary producers. Detailed characterization of Pavlomulina allowed for reconstruction of the ancient evolutionary history of the Haptophyta, a group that is one of the most important components of extant marine phytoplankton communities. 20年以上謎だった生物の正体が判明 --光合成生物進化解明のカギに--. 京都大学プレスリリース. 2021-03-29. |
| Databáze: | OpenAIRE |
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