floridean การใช้

• Historically, floridean starch has been described as lacking amylose.
• However, amylose has been identified as a component of floridean starch granules in some cases, particularly in unicellular red algae.
• Rhodoplasts synthesize a form of starch called floridean starch, which collects into granules outside the rhodoplast, in the cytoplasm of the red alga.
• Other organisms whose evolutionary history suggests secondary endosymbiosis of a red alga also use storage polymers similar to floridean starch, for example, dinoflagellates and cryptophytes.
• Red algae store sugars as floridean starch, which is a type of starch that consists of highly branched amylopectin without amylose, as food reserves outside their plastids.
• The presence of floridean starch-like storage in some apicomplexan parasites is one piece of evidence supporting a red alga ancestry for the apicoplast, a non-photosynthetic organelle.
• In a few cases, red algae have been found to use cytosolic glycogen rather than floridean starch as a storage polymer; examples such as " Galdieria sulphuraria " are found in the Cyanidiales, which are unicellular extremophiles.
• Although most red algae use floridean starch as a storage glucan, " G . sulphuraria " uses a highly unusual form of glycogen which is among the most highly branched glycogens known, has very short branch lengths, and forms particles of unusually low molecular weight.