Golden Algae

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golden algae

[′gol·dən ′al·jē]
The common name for members of the class Chrysophyceae.

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.


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.
The number of scale-bearing chrysophyte taxa observed per sample varied from zero to six (Table 1).
Multivariate analysis did not demonstrate clear relationships between the measured physical/chemical parameters and the scaled chrysophyte and synurophyte species composition of the samples.
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.
A total of 27 scale-bearing species of the algal classes Chrysophyceae and Synurophyceae, referred to herein as scaled chrysophytes, were recorded in 35 water bodies from 11 eastern Texas counties using transmission electron microscopy.
Scaled chrysophytes were observed in every collection except Lake Palestine (sample 22).
Including this paper, the silica-scaled chrysophytes known from Texas, based on electron microscopy, now comprise 33 taxa.
Among the small algae (d < 40 gm) chlorophytes prevailed followed by cryptophytes and discoid diatoms (genera Cyclotella, Stephanodiscus, Cyclostephanos) and chrysophytes + haptophytes.
The purpose of this paper is to give a taxonomic account of Indiana freshwater heliozoa observed during EM surveys for silica-scaled chrysophytes (Wujek & Swinehart 1995; Wujek & Bechtel 1997) from two northern counties and Lake Monroe in Monroe County.
Studies on silica-scaled chrysophytes from northern Indiana.