Golden Algae

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golden algae

[′gol·dən ′al·jē]
The common name for members of the class Chrysophyceae.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Golden Algae


(Chrysophyta), a phylum of lower plants. They are unicellular, colonial, or, more rarely, multicellular (disklike, threadlike, or fruticose), primarily freshwater organisms up to 2 cm long, either free-floating or attached. Their chloroplasts are golden yellow or brown; this is caused by the presence of the yellow pigments phycochrysin, β-carotene, lutein, and diatomin, in addition to chlorophyll. Their assimilation product is leucosin and, more rarely, fats and oil. Golden algae include heterotrophic organisms, some of which are capable of holozoic nutrition. The majority of unicellular golden algae are mobile, with one, two, and sometimes three or four, flagella or pseudopods, contractile vacuoles, and an ocellus; some are covered with a test of scales or are enclosed in a case. Golden algae reproduce by cell division and zoospores; a sexual process occurs in only a few species. The organisms can form silicaceous cysts. About 70 genera with more than 300 species are found in freshwater habitats of the USSR.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The increased number of chrysophyte cysts compared to diatoms strongly supports the change in the lake environment and might also be related to reduced light availability.
This is indicated in diatom stratigraphy by diatom species and chrysophyte cysts living in small shallow hard-water lakes.
It also is possible that the limiting environmental factor(s) structuring the scaled chrysophyte and synurophyte community were not measured or that scaled chrysophytes and synurophytes are not strong indicators of environment in eastern Texas lakes within the measured ranges of the environmental parameters.
In general, diatoms and chlorophytes had much higher biovolume than cyanobacteria and chrysophytes. Diatoms, primarily Asterionella sp., Fragilaria sp.
The phylogenies based on ultrastructure and 16S-like rRNA sequence comparisons are similar with respect to the exclusion of dinoflagellates and prymnesiophytes from the chromophyte/oomycete assemblage as well as the clustering of chrysophytes and synurophytes.
5A) show typical signs of early lake ontogeny in recently deglaciated terrain, namely the presence of clayey sediments with very low percent loss on ignition (LOI), low BSi concentrations, and generally low diatom and chrysophyte concentrations (Fig.
The chrysophyte Isochrysis galbana was added to each vial (in triplicate) at the beginning of the incubation period to establish the following cell concentrations: 50, 100, 200, or 300 cells/[micro]L.
Relationship Between phototrophy and phagotrophy in the mixotrophic chrysophyte Poteriochromonas malhamensis.
The ecology of chrysophyte flagellates: their growth and perennation strategies as freshwater phytoplankton.
Pringsheim 1952), but its importance was not recognized until Bird and Kalff (1986) reported that the chrysophyte Dinobryon caused [approximately equal to]30% of the bacterial grazing losses in a lake.
Experiments with the mixotrophic chrysophyte Ochromonas suggest that, when growing phagotrophically, it reaches lower reproductive rates and incurs higher metabolic costs than obligately heterotrophic flagellates.