What is Anabaena?
Anabaena is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern.
What is the scientific name for Anabaena?
AnabaenaAnabaena / Scientific name
What is the importance of Anabaena?
Azolla and the blue-green alga Anabaena azollae maintain a symbiotic relationship: the alga provides nitrogen to the fern, and the fern provides a habitat for the alga. This property of nitrogen fixation has made Azolla extremely important economically in the cultivation of rice, particularly in Asia.
What shape is Anabaena?
Anabaena, a filamentous blue-green alga composed of beadlike or barrel-shaped cells, obtained from Southern Biological, Australia, was used. They have an average diameter of ∼5 μm and a filament length from a few microns to hundreds of microns.
How is Anabaena formed?
Under environmental stress, such as light limitation, cold temperatures, or phosphate starvation, filamentous cyanobacteria such as Anabaena form specialized spores called akinetes. An akinete forms a long, oval cell adjacent to a heterocyst, where it stores nitrogen and developes a thickened envelope.
What does Anabaena produce?
Anabaena may produce a few different toxins, including anatoxin and microcystin. Ingestion of small amounts of toxin can cause gastrointestinal distress. If elevated levels of the algal toxin anatoxin are present in the water and ingested, serious neurological damage can result.
How do you identify Anabaena?
According to the accepted morphological and ecological descriptions by Desikachary (1959), the genus Anabaena is identified based on the “Presence of uniform trichomes, absence of sheath or presence of more or less diffluent sheath forming free or floccose or soft mucilaginous thallus.
Where are Anabaena found?
Anabaena, genus of nitrogen-fixing blue-green algae with beadlike or barrel-like cells and interspersed enlarged spores (heterocysts), found as plankton in shallow water and on moist soil.
What kingdom is Anabaena?
Integrated Taxonomic Information System – Report
|Kingdom||Bacteria Cavalier-Smith, 2002 – bactéries, bacteria, bacterias, bactérias|
|Subkingdom||Negibacteria Cavalier-Smith, 2002|
|Phylum||Cyanobacteria Cavalier-Smith, 2002 – blue-green algae, cyanophytes|
How does Anabaena grow?
(a) Anabaena grows in filaments of photosynthetic cells in the presence a reduced nitrogen source. (b) When filaments are transferred to a nitrogen-free medium, heterocysts form within 24 h (arrows).
How do Anabaena reproduce?
Anabaena typically reproduce via fragmentation. Fragmentation is where a section of the chain will split off and either float or glide away. After a while these sections begin to form their own chains. These sections are known as hormogonia, and arise via the separation of adjacent cell walls.
Is Anabaena a fungi?
Anabaena is a filamentous true cyanobacterium that has nitrogen-fixing capabilities. It is a member of kingdom Monera. So, the correct answer is ‘Monera’.
What is the meaning of Anabaena?
[ an-uh-bee-nuh ] / ˌæn əˈbi nə /. any of the freshwater algae of the genus Anabaena, commonly occurring in masses and often contaminating drinking water, giving it a fishy odor and taste.
What is Anabaena in pond water?
Anabaena. A genus of Cyanobacteria found in fresh water that can cause odor in water supplies; although not invasive pathogens, they produce potent saxitoxinlike neurotoxins that can poison farm animals that ingest heavily infected pond water.
What makes Anabaena different from other cyanobacteria?
Anabaena are special amongst cyanobacteria in that they have heterocysts, which are specialized nitrogen-fixating cells using the enzyme nitrogenase. Nitrogenase becomes inactive in the presence of oxygen, which means that the Anabaena must be in an anaerobic environment.
Are there different types of Anabaena?
There are both solitary and colonial forms, the latter resembling a closely related genus, Nostoc. In temperate latitudes during the summer months, Anabaena may form water blooms.