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A carpospore is a diploid spore produced by red algae. After fertilization, the alga's carpogonium subdivides into carpospores, and generally the largest type of spore (larger than bispores, which are larger again than tetraspores). [1] The wall of the carposporangium then breaks down, releasing the spores into the environment. [2]
Polysiphonia, known as red hair algae, [1] is a genus of filamentous red algae with about 19 species on the coasts of the British Isles [2] and about 200 species worldwide, [3] including Crete in Greece, Antarctica and Greenland. [4] [5] Its members are known by a number of common names. [note 1] [4] It is in the order Ceramiales and family ...
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 ...
The Archaeplastida (or kingdom Plantae sensu lato "in a broad sense"; pronounced / ɑːr k ɪ ˈ p l æ s t ɪ d ə /) are a major group of eukaryotes, comprising the photoautotrophic red algae (Rhodophyta), green algae, land plants, and the minor group glaucophytes. [6]
Florideophyceae is a class of exclusively multicellular red algae. [3] [4] They were once thought to be the only algae to bear pit connections, [5] but these have since been found in the filamentous stage of the Bangiaceae. [6] They were also thought only to exhibit apical growth, but there are genera known to grow by intercalary growth. [6]
Carrageenans are abundant in the cell walls of some red algae, where they provide the thallus with additional flexibility to protect it from the impacts of herbivory, wave action, and desiccation. Environmental variables such as temperature, amount of rainfall, and salinity likely influence the yield and viscosity of the carrageenan.
Thorea is a genus of fresh water algae in the division Rhodophyta (). [1] Thorea is a small alga with filaments up to 200 cm long, dark green in colour and not red as are marine Rhodophyta.
Laurencia belongs to the family Rhodomelaceae which is considered to be one of the largest marine red algae family, estimated to have 125 genera and 700 species all over the world. In Laurenciae, a tribe consisting of eight genera, have a taxonomic group called " Laurencia complex " or Laurencia sensu lato which includes six of eight genera ...