Dinoflagellates

Matthießen, Jens; Schreck, Michael

doi:10.1007/978-94-007-6644-0_55-1

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…Dinoflagellates are a major phytoplankton group in aquatic ecosystems, contributing significantly to ocean primary productivity and carbon cycling [1]. Members of the group are infamous for causing harmful algal blooms (red tides) [2], which may cause mortality or physiological impairment either due to toxin production, oxygen depletion or physical clotting of gills attributed to high biomass [3].…”

Section: Introductionmentioning

confidence: 99%

DNA Damage Response Pathways in Dinoflagellates

Wong

2019

Microorganisms

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Dinoflagellates are a general group of phytoplankton, ubiquitous in aquatic environments. Most dinoflagellates are non-obligate autotrophs, subjected to potential physical and chemical DNA-damaging agents, including UV irradiation, in the euphotic zone. Delay of cell cycles by irradiation, as part of DNA damage responses (DDRs), could potentially lead to growth inhibition, contributing to major errors in the estimation of primary productivity and interpretations of photo-inhibition. Their liquid crystalline chromosomes (LCCs) have large amount of abnormal bases, restricted placement of coding sequences at the chromosomes periphery, and tandem repeat-encoded genes. These chromosome characteristics, their large genome sizes, as well as the lack of architectural nucleosomes, likely contribute to possible differential responses to DNA damage agents. In this study, we sought potential dinoflagellate orthologues of eukaryotic DNA damage repair pathways, and the linking pathway with cell-cycle control in three dinoflagellate species. It appeared that major orthologues in photoreactivation, base excision repair, nucleotide excision repair, mismatch repair, double-strand break repair and homologous recombination repair are well represented in dinoflagellate genomes. Future studies should address possible differential DNA damage responses of dinoflagellates over other planktonic groups, especially in relation to possible shift of life-cycle transitions in responses to UV irradiation. This may have a potential role in the persistence of dinoflagellate red tides with the advent of climatic change.

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Section: Introductionmentioning

confidence: 99%

DNA Damage Response Pathways in Dinoflagellates

Wong

2019

Microorganisms

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“…Dinoflagellates are unicellular protists that have two distinctive flagella during their life cycle [1]. The size of dinoflagellates ranges from a few micrometers to two millimeters [2].…”

Section: Introductionmentioning

confidence: 99%

Omics Analysis for Dinoflagellates Biology Research

Wang

Zhang

2019

Microorganisms

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Dinoflagellates are important primary producers for marine ecosystems and are also responsible for certain essential components in human foods. However, they are also notorious for their ability to form harmful algal blooms, and cause shellfish poisoning. Although much work has been devoted to dinoflagellates in recent decades, our understanding of them at a molecular level is still limited owing to some of their challenging biological properties, such as large genome size, permanently condensed liquid-crystalline chromosomes, and the 10-fold lower ratio of protein to DNA than other eukaryotic species. In recent years, omics technologies, such as genomics, transcriptomics, proteomics, and metabolomics, have been applied to the study of marine dinoflagellates and have uncovered many new physiological and metabolic characteristics of dinoflagellates. In this article, we review recent application of omics technologies in revealing some of the unusual features of dinoflagellate genomes and molecular mechanisms relevant to their biology, including the mechanism of harmful algal bloom formations, toxin biosynthesis, symbiosis, lipid biosynthesis, as well as species identification and evolution. We also discuss the challenges and provide prospective further study directions and applications of dinoflagellates.

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The Community Structure of Plankton at Floating Net Cages Aquaculture Area in Sendang Biru Water Indonesia

Hidayati,

Saptarini,

Wirawan

et al. 2024

BIO Web Conf.

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The leftover food and feces from fish aquaculture in the floating net cages (FNC) may contribute to the nutrient enrichment at surrounding FNC water. The phytoplankton community structure is the one of important indicator for water quality evaluation. This research aims to determine the plankton community structure and water quality around FNC, Sendang Biru, Malang. Plankton samples and physico-chemical parameters were taken at 3 locations at surrounding FNC area. The results show that phytoplankton from the Bacillariophyceae class and zooplankton from the Hexanauplia class (copepods) dominate in the community structure. Phytoplankton abundance ranges from 795-11405 ind/L, diversity index (H') ranges from 1.47-2.43, evenness index (E) ranges from 0.76-0.95, and dominance index (D) ranges from 0.1-0.3. Meanwhile, zooplankton abundance ranges from 15-634 ind/L, H' value in range of 2.05-2.58, E value in the range of 0.72-0.84, D value in the range of 0.11 -0.17. Nitrate and phosphate have values that exceed the specified quality standards.

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Dinoflagellates

Cited by 3 publications

References 29 publications

DNA Damage Response Pathways in Dinoflagellates

DNA Damage Response Pathways in Dinoflagellates

Omics Analysis for Dinoflagellates Biology Research

The Community Structure of Plankton at Floating Net Cages Aquaculture Area in Sendang Biru Water Indonesia

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