Category: Dinoflagellate genomics

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Snow and Glacial Algae: A Review.
J Phycol. 2019 Dec 11;:
Authors: Hoham RW, Remias D
Abstract
Snow or glacial algae are found on all continents, and most species are in the Chlamyd…

Snow or glacial algae are found on all continents, and most species are in the Chlamydomonadales (Chlorophyta) and Zygnematales (Streptophyta). Other algal groups include euglenoids, cryptomonads, chrysophytes, dinoflagellates, and cyanobacteria. They may live under extreme conditions of temperatures near 0°C, high irradiance levels in open exposures, low irradiance levels under tree canopies or deep in snow, acidic pH, low conductivity, and desiccation after snow melt. These primary producers…

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Rare bacteria in seawater are dominant in the bacterial assemblage associated with the Bloom-forming dinoflagellate Noctiluca scintillans.
Sci Total Environ. 2019 Nov 22;:135107
Authors: Xia X, Ki L…

Noctiluca scintillans is a bloom-forming dinoflagellate, which is widely distributed in the global coastal seas. Associated bacteria have been proven to be essential for the survival and growth of zooplanktons. However, the diversity and function of bacteria associated with Noctiluca scintillans are under studied and largely unknown. Here, we examined the diversity and function of bacteria associated with field-acquired and laboratory-maintained Noctiluca cells. Our results showed that the…

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Transcriptomic Profile and Sexual Reproduction-Relevant Genes of Alexandrium minutum in Response to Nutritional Deficiency.
Front Microbiol. 2019;10:2629
Authors: Meng FQ, Song JT, Zhou J, Cai ZH
…

Alexandrium minutum is a typical marine toxic dinoflagellate responsible for producing paralytic shellfish poisoning (PSP) toxins. Until now, we know little about the genomic information of A. minutum, so a transcriptome study was conducted to clarify the physiological adaptations related to nutritional deficiency. Here, we performed RNA-Seq analysis to assess the gene expression patterns of A. minutum under N and P deficient conditions for 0 (control), 6, and 72 h. Main differences between the…

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Nitric oxide mediates oxylipin production and grazing defense in diatoms.
Environ Microbiol. 2019 Nov 28;:
Authors: Johnson MD, Edwards BR, Beaudoin DJ, Van Mooy BAS, Vardi A
Abstract
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Diatom blooms are important features of productive marine ecosystems and are known to support higher trophic levels. However, when stressed or wounded, diatoms can produce oxylipin molecules known to inhibit the reproduction and development of copepods and decrease microzooplankton growth rates. Using oxylipin chemical treatments, lipidomic analysis and functional genomic approaches, we provide evidence that nitric oxide (NO) and oxylipin signalling pathways in diatoms respond to protist…

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Metabolic relationships of uncultured bacteria associated with the microalgae Gambierdiscus.
Environ Microbiol. 2019 Nov 27;:
Authors: Rambo IM, Dombrowski N, Constant L, Erdner D, Baker BJ
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Haliea alexandrii sp. nov., isolated from phycosphere microbiota of the toxin-producing dinoflagellate Alexandrium catenella.
Int J Syst Evol Microbiol. 2019 Nov 21;:
Authors: Yang Q, Jiang Z, Zhou…