Peridiniopsis jiulongensis, a new freshwater dinoflagellate with a diatom endosymbiont from China

You, Xuejing; Luo, Zhaohe; Su, Y. C.; Gu, Li; Gu, Haifeng

doi:10.1127/nova_hedwigia/2015/0272

Cited by 14 publications

(10 citation statements)

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“…Amphidinium and Notosolenus species have both been commonly observed in marine sediments ( 2 ), and Peridiniopsis spp. are members of freshwater plankton ( 63 ). These findings provide evidence that peanut worms feed not only on benthic, but also planktonic microalgae, even including some from freshwater run-off, at sediment-dwelling stages.…”

Section: Discussionmentioning

confidence: 99%

Molecular Detection of Eukaryotic Diets and Gut Mycobiomes in Two Marine Sediment-Dwelling Worms, Sipunculus nudus and Urechis unicinctus

Wang

Shi

Huang

et al. 2018

Microbes and environments

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The present study aimed to reveal the eukaryotic diets of two economically important marine sediment-inhabiting worms, Sipunculus nudus (peanut worm) and Urechis unicinctus (spoon worm), using clone libraries and phylogenetic analyses of 18S rRNA genes. Fungal rDNA was also targeted and analyzed to reveal mycobiomes. Overall, we detected a wide range of eukaryotic phylotypes associated with the larvae of S. nudus and in the gut contents of both worms. These phylotypes included ciliates, diatoms, dinoflagellates, eustigmatophytes, placidids, oomycetes, fungi, nematodes, flatworms, seaweeds, and higher plants. Oomycetes were associated with the planktonic larvae of S. nudus. The composition of eukaryotic diets shifted greatly across the larval, juvenile, and adult stages of S. nudus, and among different gut sections in U. unicinctus, reflecting lifestyle changes during the ontogeny of the peanut worm and progressive digestion in the spoon worm. Malassezia-like fungi were prevalent in mycobiomes. Epicoccum and Trichosporon-related phylotypes dominated mycobiomes associated with larval individuals and in the gut contents of adults, respectively. The gut mycobiome of S. nudus was successively characterized through the midgut, aspiratory intestines, hindgut, and rectum as having a high proportion of Climacodon-Rhizochaete, Ceriporiopsis, Cladosporium-Pseudomicrostroma, and Malassezia-related species in the libraries. These results emphasize the dynamics of diets and gut mycobiomes in marine benthic animals.

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Section: Discussionmentioning

confidence: 99%

Molecular Detection of Eukaryotic Diets and Gut Mycobiomes in Two Marine Sediment-Dwelling Worms, Sipunculus nudus and Urechis unicinctus

Wang

Shi

Huang

et al. 2018

Microbes and environments

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“…A single species from different habitats can show pronounced variation in ribosomal DNA sequences, for instance, marine Durinskia baltica (AF231803) differs from its freshwater counterpart (GU999528) at 32 positions (98.33% similarity) in SSU sequence. Durinskia baltica was classified within a diatom harboring clade and most species within the clade inhabit fresh waters (You et al ), suggesting that D. baltica might have re‐colonized the marine waters.…”

Section: Discussionmentioning

confidence: 99%

Huia caspica gen. & comb. nov., a dinoflagellate species that recently crossed the marine‐freshwater boundary

Mertens

Liu

2016

Phycological Research

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SUMMARY The dinoflagellate subfamily Diplopsalidoideae encompasses 11 genera whose plate patterns show a large diversity. In a recently published molecular phylogeny (Liu et al. 2015) some of these genera (e.g. Diplopsalis, Diplopelta) are polyphyletic, suggesting that further subdivision of these genera is needed. Here we established the cyst‐theca relationship of Diplopsalis caspica by incubating cysts collected from the East China Sea. Cells of D. caspica display a plate formula of Po, X, 3′, 1a, 6″, 3c+t, ?4s, 5″′, 1″″, characterized by a small, parallelogrammic anterior intercalary plate (1a) located in the middle of the dorsal part of the epitheca. The cysts are spherical and smooth‐walled with a theropylic archeopyle. In addition, we obtained four large subunit ribosomal DNA (LSU rDNA) sequences from the germinated motile cells by single‐cell polymerase chain reaction. Strains of D. caspica from the marine environment of the East China Sea differ at 0–2 positions of LSU rDNA sequences from that of lacustrine strains from NE China. In the molecular phylogeny, D. caspica was close to Lebouraia pusilla but distant from D. lenticula, the type species of Diplopsalis. Our results support the systematic importance of plate 1a, and therefore D. caspica was transferred to a new genus, Huia. The conservative LSU rDNA sequences in H. caspica suggest that the marine‐freshwater transition occurred recently.

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“…Dinotoms provide further insight into endosymbiosis because while the host cells form a clear monophyletic clade within the Perindiniales, the symbionts are not all derived from a single endosymbiotic event. Molecular phylogenies of plastid genes indicate that the source diatoms differ in different dinotoms-from the pennate genus Nitzschia, to centric genera Chaetoceros, Cyclotella and Discostella (Chesnick, Kooistra, Wellbrock, & Medlin, 1997;Horiguchi & Takano, 2006;Tamura et al, 2005;Yamada, Sym, & Horiguchi, 2017;You, Luo, Su, Gu, & Gu, 2015;Q. Zhang, Liu, & Hu, 2014).…”

Section: Complex Plastid Endosymbionts Derived From Diatomsmentioning

confidence: 99%

Plastid Complexity in Dinoflagellates: A Picture of Gains, Losses, Replacements and Revisions

Waller

Kořený

2017

Advances in Botanical Research

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Dinoflagellates are exemplars of plastid complexity and evolutionary possibility. Their ordinary plastids are extraordinary, and their extraordinary plastids provide a window into the processes of plastid gain and integration. No other plastid-bearing eukaryotic group possesses so much diversity or deviance from the basic traits of this cyanobacteria-derived endosymbiont. Although dinoflagellate plastids provide a major contribution to global carbon fixation and energy cycles, they show a remarkable willingness to tinker, modify and dispense with canonical function. The archetype dinoflagellate plastid, the peridinin plastid, has lost photosynthesis many times, has the most divergent organelle genomes of any plastid, is bounded by an atypical plastid membrane number, and uses unusual protein trafficking routes. Moreover, dinoflagellates have gained new endosymbionts many times, representing multiple different stages of the processes of organelle formation. New insights into dinoflagellate plastid biology and diversity also suggests it is timely to revise notions of the origin of the peridinin plastid.

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Peridiniopsis jiulongensis, a new freshwater dinoflagellate with a diatom endosymbiont from China

Cited by 14 publications

References 0 publications

Molecular Detection of Eukaryotic Diets and Gut Mycobiomes in Two Marine Sediment-Dwelling Worms, <i>Sipunculus nudus</i> and <i>Urechis unicinctus</i>

Molecular Detection of Eukaryotic Diets and Gut Mycobiomes in Two Marine Sediment-Dwelling Worms, <i>Sipunculus nudus</i> and <i>Urechis unicinctus</i>

Huia caspica gen. & comb. nov., a dinoflagellate species that recently crossed the marine‐freshwater boundary

Plastid Complexity in Dinoflagellates: A Picture of Gains, Losses, Replacements and Revisions

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