Florideophyceae


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Related to Florideophyceae: Rhodophyceae, Bangiophyceae

Florideophyceae

[flə¦rid·ē·ō¦fīs·ē‚ē]
(botany)
A class of red algae, division Rhodophyta, having prominent pit connections between cells.
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 It might be outdated or ideologically biased.

Florideophyceae

 

a class of red algae (division Rhoidophyta). The multicellular thalli, which may be microscopic or measure as much as 0.5 m in height, consist of a single row of cells or of complex tissue structure. They may be filamentous, lamellar, or bushy and are sometimes divided into a stem and leaflike organs. In several of the Florideophyceae, for example, the genus Lithothamnion, the thalli are hard owing to deposits of calcium salts. The cells of Florideophyceae have evident plasmodesmata.

The growth cycle consists in alternating generations of sporophytes and gametophytes. The sporophytes, which are usually diploid, produce tetraspores or sometimes monospores or poly-spores. In the gametophytes, after fertilization, filaments bearing the carpospores grow from the carpogonium, either directly or from special connected cells.

The class includes approximately 540 genera, with 3,700 species, all but a few of which are marine species. Some species parasitize other members of the class. Several members of the Florideophyceae are used for the production of gelatin-forming substances and for medical purposes.

REFERENCES

See references under RHOIDOPHYTA.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
There are four phyla of algae including red algae (Florideophyceae), brown algae (Phaeophyceae), green algae (Chlorophyta), and diatom (Bacillariophyceae) and two phyla of plants from coastal wetlands including Pteridophyta and Angiospermae [10].
With minor differences, species of the subphylum Eurhodophytina (containing Florideophyceae and Bangiophyceae) are mostly alike in mitochondrial gene content.
Pyropia leucosticta L1 (Thuret) Neefus et J.Brodie Clase Florideophyceae Orden Colaconematales Colaconemataceae 21.
Chlorophyta: Ulvophyceae: Ulva fasciata Delile, 1813 Ulvales: Ulvaceae Ulva flexuosa Wulfen, 1803 as Enteromorpha lingulata Ulva lactuca Linnaeus, 1753 Rhodophyta: Florideophyceae: Acrochaetium infestans Howe & Acrochaetiales: Hoyt, 1916 Acrochaetiaceae Rhodophyta: Florideophyceae: Ceramium avalonae Dawson, 1949 Ceramiales: Ceramiaceae Antithamnionella breviramosa (Dawson) Wollaston, 1970 as Antithamnion breviramosus Rhodophyta: Florideophyceae: Hypoglossum attenuatum var.
A new taxonomic interpretation of the type of Plocamium cartilagineum (Plocamiales, Florideophyceae) and its consequences.
Gracilaria chilensis es un alga roja agarofita perteneciente a la clase Florideophyceae. En este estudio se describe la formacion de pelos en talos mantenidos en cultivo en agua de mar enriquecida, bajo condiciones controladas de luz y temperatura.
Periodicity of spore discharge in tropical Florideophyceae (Rhodophyta).
Polysiphonia sensu lato (Ceramiales, Florideophyceae) species of Caribbean Panama including Polysiphonia lobophoralis sp.
Species Richness was 31, with classes Florideophyceae constituting 10 species, Phaeophyceae 9 species, and Chlorophyceae 10 species.