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Chloroplasts probably evolved following an endosymbiotic event between an ancestral, photosynthetic cyanobacterium and an early eukaryotic phagotroph. [17] This event (termed primary endosymbiosis) is at the origin of the red and green algae (including the land plants or Embryophytes which emerged within them) and the glaucophytes, which together make up the oldest evolutionary lineages of ...
Galdieria partita is a species of extremophilic red algae that lives in acidic hot springs. [1] It is the only unicellular species of red algae known to reproduce sexually. [ 2 ] It was discovered in 1894 by Josephine Elizabeth Tilden from Yellowstone National Park in the western United States. [ 3 ]
Agar can be derived from many types of red seaweeds, including those from families such as Gelidiaceae, Gracilariaceae, Gelidiellaceae and Pterocladiaceae (including Pterocladiella, [6]). It is a polysaccharide located in the inner part of the red algal cell wall. It is used in food material, medicines, cosmetics, therapeutic and biotechnology ...
Coralline algae are red algae in the order Corallinales. They are characterized by a thallus that is hard because of calcareous deposits contained within the cell walls. The colors of these algae are most typically pink, or some other shade of red, but some species can be purple, yellow, blue, white, or gray-green.
All other groups which have chloroplasts, besides the amoeboid genus Paulinella, have chloroplasts surrounded by three or four membranes, suggesting they were acquired secondarily from red or green algae. [note 1] Unlike red and green algae, glaucophytes have never been involved in secondary endosymbiosis events. [10] The cells of the ...
The cells of the cortical filaments are lens-shaped, ellipsoidal, up to 30 μm in length. [10] Each cell contains several ribbon-shaped chloroplasts without pyrenoids. The chloroplasts contain a single fragmented thylakoid. [4] Among the metabolites, in addition to substances typical for all red algae (such as red algal starch), trehalose is ...
Diatoms and brown algae are examples of algae with secondary chloroplasts derived from endosymbiotic red algae, which they acquired via phagocytosis. [6] Algae exhibit a wide range of reproductive strategies, from simple asexual cell division to complex forms of sexual reproduction via spores. [7]
Gelidium amansii, also known as by its Korean name umutgasari, [1] is an economically important species of red algae commonly found and harvested in the shallow coast (3 to 10 m or 10 to 33 ft of depth below the water) of many East Asian countries including North and South Korea, China, Japan, Singapore, and northeast Taiwan.