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CHRYSOPHYTA

krəsŏfˈətə, phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista consisting of the diatoms (class Bacillariophyceae), the golden, or golden-brown, algae (class Chrysophyceae), and the yellow-green algae (class Xanthophyceae). In many chrysophytes the cell walls are composed of cellulose with large quantities of silica. Some have one or two flagella, which can be similar or dissimilar. A few species are ameboid forms with no cell walls. The food storage products of chrysophytes are oils or the polysaccharide laminarin. Formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c; all but the yellow-green algae also contain the carotenoid pigment fucoxanthin. Under some circumstances diatoms will reproduce sexually, but the usual form of reproduction is cell division. The diatoms and golden-brown algae are of great importance as components of the plankton and nanoplankton that form the foundation of the marine food chain.

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Questia Books and Articles on: Chrysophyta

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books on: Chrysophyta - 11 results

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Seas, Maps, and Men: An Atlas-History of Man's Exploration of the Oceans
Book by G. E.R. Deacon; Doubleday, 1962
Subjects:	Ocean
...green algae RHODOPHYTA Red algae PYRROPHYTA Dinoflagellates CHRYSOPHYTA Yellow-green algae Diatoms PHAEOPHYTA Brown algae CHLOROPHYTA...consists of microscopic members of the divisions PYRROPHYTA, CHRYSOPHYTA, and CHLOROPHYTA. Its chief constituents are dinoflagellates...

Evolution and Genetics: The Modern Theory of Evolution
Book by David J. Merrell, Olivia Jensen Ingersoll; Holt, Rinehart and Winston, 1962
Subjects:	Evolution (Biology), Genetics
...pigments, phycoerythrin and phycocyanin. Pyrrophyta and Chrysophyta The cryptomonads and dinoflagellates have been placed by...and reserve food in the form of starches or oils. The Chrysophyta include the yellow-green algae, the golden brown algae...

Radioecology: Proceedings of the First National Symposium on Radioecology Held at Colorado State University, Fort Collins, Colorado, September 10-15, 1961
Book by Vincent Schultz, Alfred W. Klement Jr.; Reinhold Pub. Corp., 1963
Subjects:	Radioecology--Congresses
...8 - 15.2 Rhodophyta Batrachospermum 12 1.5 0.6 0.0 - 7.1 Chrysophyta diatoms 3 11.3, 11.4, 24.4 11.3 - 24.4 5 9.4 2.7 3.2 - 16.5 Chrysophyta Vaucheria 13 7.7 1.5 1.3 - 20.5 10 9.7 1.9 2.4 - 15.8...

The World of Plant Life
Book by Clarence J. Hylander; Macmillan, 1939
Subjects:	Botany--United States
...land animals. Most graceful of all is Micras Unicellular CHRYSOPHYTA Diatoms Stephanodiscus; Navicula upper right ; Licmophora...belongs to a group of Algae known as the Golden-brown Algae Chrysophyta , because of the yellowish cast to the cells. In some species...

Theoretical Morphology: The Concept and Its Applications
Book by George R. Mcghee Jr.; Columbia University Press, 1999
Subjects:	Morphogenesis--Mathematical Models, Morphology--Mathematics, Morphology--Statistical Methods
...cranium here as well). Microorganisms with skeletons consisting of rods of silica can be found in three different phyla: the Chrysophyta (silicoflagellates), the Sarcodina (radiolarians), and the Pyrrophyta (ebridians). McCartney and Loper (1989...

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journal articles on: Chrysophyta - 1 result

The Role of Diatoms in Medicolegal Investigations I: The History, Contemporary Science, and Application of the Diatom Test for Drowning
Journal article by Edward J. Rohn, Peter D. Frade; The Forensic Examiner, Vol. 15, 2006
Subjects:	Diatoms--Research, Drowning victims--Investigations, Forensic sciences--Research
...to remain at center stage. The Biology and Ecology of Diatoms Diatoms are part of the Bacillariophyceae division of the Chrysophyta family of microscopic unicellular plants. The genera, species, and individuals of this enormous group are so numerous...

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encyclopedia articles on: Chrysophyta - 5 results

Chrysophyta
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
CHRYSOPHYTA kr sof t , phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista consisting of the diatoms...

Algae
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...kingdom Monera and renamed cyanobacteria . See the separate phyla (divisions) Chlorophyta , Euglenophyta , Dinoflagellata , Chrysophyta , Phaeophyta , Rhodophyta . Uses of Algae Algae, the major food of fish (and thus indirectly of many other animals...

Diatom
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...has been deposited by diatoms, and much petroleum is of diatom origin. Diatoms are classified in the phylum (division) Chrysophyta , class Bacillariophyceae. ____________________ Copyright 2009 Columbia University Press. Used with...

Sarcodina
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...of amebic dysentery . With the exception of chloroplasts, sarcodines are identical to the ameboid members of the phylum Chrysophyta . Sarcodines may reproduce asexually by cell division, often without breakdown of the nuclear envelope that is typical in...

Phaeophyta
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...worlds familiar seaweeds are members of Phaeophyta. There are approximately 1,500 species. Like the chrysophytes (see Chrysophyta ), brown algae derive their color from the presence, in the cell chloroplasts, of several brownish carotenoid pigments...

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