Ultrastructural and Phylogenetic Studies of Three Freshwater Dinoflagellates PDF Download

Author: Lee Warren Wilcox
Publisher:
ISBN:
Category : Dinoflagellates
Languages : en
Pages : 248

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Author: Øjvind Moestrup
Publisher: Springer Spektrum
ISBN: 9783662562680
Category : Science
Languages : de
Pages : 561

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Book Description
This volume covers the freshwater dinoflagellates of the world and comprises 350 species. It serves as a reference work for identifying freshwater dinoflagellates by providing keys, detailed descriptions, and illustrations for all described species. The illustrations are based on old and classic descriptions and drawings that were combined with more recent figures. The introductory chapters comprise the history of dinoflagellate research, cell structure, ecology (by K. Rengefors and A. Kremp) and cell culturing (by G. Hansen). Taxonomic studies of dinoflagellates began at the time of early light microscopists, and modern studies have shown that long-held views on the taxonomy are often unsatisfactory. Two new orders, Amphidiniales and Tovelliales, three new families, Amphidiniaceae, Gyrodiniaceae and Sphaerodiniaceae, and two new genera, Matvienkoella and Speroidium, are proposed. Seven new species and one new variety are described. Four new names and 80 new combinations are established.

Author: Nahid Khalili
Publisher: GRIN Verlag
ISBN: 3346966895
Category : Medical
Languages : en
Pages : 191

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Doctoral Thesis / Dissertation from the year 2013 in the subject Biology - Micro- and Molecular Biology, University Kebangsaan Malaysia, language: English, abstract: Dinoflagellates are microscopic unicellular microalgae found in aquatic environments worldwide. One common feature of dinoflagellates is the presence of two unequal flagella: The longitudinal flagellum is round while the transverse flagellum is ribbon-shaped. Currently little is known about the intracellular ultrastructure of the dinoflagellate flagella apparatus and molecular aspects of the flagella assembly are unknown. In this study a combination of ultrastructure studies using scanning (SEM) and transmission electron microscopy (TEM), and molecular analysis of transcriptomics data was used to gain understanding on the flagella apparatus of the toxic marine dinoflagellate Alexandrium minutum. Samples for SEM and TEM observations were prepared using standard protocols. For transcriptomics analysis, total RNA was harvested from exponential phase cultures during the light and dark culture periods. The transcriptome was sequenced using HiSeq sequencing, assembled and annotated. The assembled sequences were searched for putative genes involved in flagella synthesis, assembly and functioning based on annotations and reverse Blast analysis. The putative genes were used in phylogenetic and in silico protein analysis. Transcriptome sequencing produced 399,169 unigenes, of which 412 were related to flagella biosynthesis and function. Structural flagella genes found were α, β and γ dynein; α, β and γ tubulin; radial spoke, basal body, central pair wd, central pair pf20, flagellar protofilament ribbon protein, calcium binding, sodium–type flagellar motor component and nexin. There were also several intraflagellar transport (IFT) genes namely 20, 27, 52, 57, 74, 80, 81, 88, 122 and 172. The other flagella related genes found were genes for kinesin II and cytoplasmic dynein 2. Ultrastructure observation by TEM showed that the Cells had the typical dinoflagellate organelles. The chloroplast contained two or three apprised thylakoids, and was surrounded by three membranes, the eyespot is located dorsally and composed of one or two layers of globules situated within the chloroplast, In the periphery of the cell, trichocysts, mucocysts, and unidentified multilayered material were visible This study provided for the first time a large volume of gene data that can be used to better understand the molecular basis of flagella biosynthesis and function in dinoflagellates.

Author: Susan Carty
Publisher: Cornell University Press
ISBN: 0801470374
Category : Science
Languages : en
Pages : 272

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Dinoflagellates are common unicellular organisms found in all types of aquatic ecosystems and are important contributors to freshwater ecosystems as significant primary producers of biomass. Despite increasing interest in the biology of living and fossil dinoflagellates, there has been no compilation of dinoflagellate species found in North America since 1934, and no keys to species. In Freshwater Dinoflagellates of North America, Susan Carty provides a much-needed taxonomic guide covering Canada, the United States, Mexico, all of Central America, the Caribbean, and Greenland. Features of the book include • identification of dinoflagellate species, • distribution maps of species, • ecological and morphological keys to genera, • key to species within genus, • lists of references by location, • glossary, and • an extensive illustration program. Following an introductory section on the biology, morphology, and ecology of freshwater dinoflagellates, the species are presented in a field guide format with distribution maps, written descriptions emphasizing notable features, line drawings, and black-and-white and color micrographs.

Author: António José B.F.M. Calado
Publisher:
ISBN:
Category :
Languages : en
Pages : 124

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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 782

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Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 486

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Author: Mona Hoppenrath
Publisher:
ISBN: 9783510614028
Category : Benthos
Languages : en
Pages : 276

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Book Description

Author: F. Marret
Publisher: Geological Society of London
ISBN: 9781862393684
Category : Science
Languages : en
Pages : 386

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Book Description
This volume provides an overview of current research on fossil and modern dinoflagellates, as well as highlighting research areas for future collaboration, following the DINO9 International Conference in Liverpool. The volume is organized into four themes, with a review paper for each theme written by the key-note speaker. Each theme also includes a future research foci note following discussion during the conference. The contributions are organized into the following sections: environmental change, ecology/palaeoecology, life cycles and diversity, and stratigraphy and evolution. Also included are notes from two workshops: culture experiments and dinocysts as palaeoceanographic tracers. This volume will be of interest to both the biological and micropalaeontological communities.

Author: Juliet Brodie
Publisher: CRC Press
ISBN: 0849379903
Category : Science
Languages : en
Pages : 414

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Book Description
Acting as titans in global control of the biosphere and colonizing virtually all corners of the earth, algae, extremely diverse and numerous oxygenic, photosynthetic organisms, can be major players in and drivers of environmental change. For hundreds of years, since their evolutionary origins by endosymbiosis, when a protozoan enslaved a cyanobacte