Red Algae

The red algae, or Rhodophyta ( /roʊˈdɒfɨtə/ or /ˌroʊdəˈfaɪtə/; from Greek: ῥόδον (rhodon) = rose + φυτόν (phyton) = plant, thus red plant), are one of the oldest groups of eukaryotic algae, and also one of the largest, with about 5,000–6,000 species of mostly multicellular, marine algae, including many notable seaweeds. Other references indicate as many as 10,000 species; more detailed counts indicate about 4,000 in about 600 genera (3,738 marine species in 546 genera and 10 orders (plus the unclassifiable); 164 freshwater species in 30 genera in eight orders).

The red algae form a distinct group characterized by these attributes: eukaryotic cells without flagella and centrioles, using floridean polysaccharides as food reserves, with phycobiliproteins as accessory pigments (giving them their red color), and with chloroplasts lacking external endoplasmic reticulum and containing unstacked thylakoids. Most red algae are also multicellular, macroscopic, marine, and have sexual reproduction. They often have alternation of generations and may have three generations rather than two.

Many of the coralline algae, which secrete calcium carbonate and play a major role in building coral reefs, belong here. Red algae such as dulse (Palmaria palmata) and laver (nori/gim) are a traditional part of European and Asian cuisines and are used to make other products such as agar, carrageenans and other food additives.

Read more about Red AlgaeHabitat, Fossil Record, Taxonomy, Species of Red Algae, Chemistry, Morphology, Human Consumption

Other articles related to "red algae, algae":

Eukaryota - Classification - Phylogeny - Alternative Views
... Eukaryotes Amoebozoa Opisthokonta Excavata Red algae Glaucophyta Chromalveolata (including Rhizaria) Green plants There are also smaller groups of eukaryotes – including ... on classical and combined data which have red algae as basal molecular analyses and Goloboff et al's combined analysis all of which show Archeoplastida as artificial, and it is mostly weakly supported in other ... not just when obvious 'long-branch attraction' is encountered." Red algae as basal is also supported by molecular evidence ...
Phycoerythrin - Structural Characteristics
... (B-PE) and R-phycoerythrin (R-PE) from red algae in addition to α and β chains have third, γ subunit combining linker and light-harvesting functions, because bears chromophores ... R-phycoerythrin is predominantly produced by red algae ... is made up of at least three different subunits and varies according to the species of algae that produces it ...
Brown Algae - Evolutionary History - Fossils
... lies in the convergent evolution of morphologies between many brown and red algae ... Most fossils of soft-tissue algae preserve only a flattened outline, without the microscopic features that permit the major groups of multicellular algae to be reliably distinguished ... Among the brown algae, only species of the genus Padina deposit significant quantities of minerals in or around their cell walls ...
Red Algae - Human Consumption
... In East and Southeast Asia, agar is most commonly produced from Gelidium amansii ... In Asia, rhodophytes are important sources of food, such as nori ...

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