Anabaena
You don't need to be Editor-In-Chief to add or edit content to WikiDoc. You can begin to add to or edit text on this WikiDoc page by clicking on the edit button at the top of this page. Next enter or edit the information that you would like to appear here. Once you are done editing, scroll down and click the Save page button at the bottom of the page.
- For Anabaena A.Juss., a plant genus of the Euphorbiaceae, see its synonym Romanoa.
| Anabaena | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Anabaena sphaerica (Nostocales)
| ||||||||||||
| Scientific classification | ||||||||||||
|
Anabaena is a genus of filamentous cyanobacteria, or blue-green algae, found as plankton. It is known for its nitrogen fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern. They are one of four genera of cyanobacteria that produce neurotoxins, which are harmful to local wildlife, as well as farm animals and pets.
A DNA sequencing project was undertaken in 1999, which mapped the complete genome of Anabaena, which is 7.2 million base pairs long. The study focussed on heterocysts, which convert nitrogen into ammonia. Certain species of Anabaena have been used on rice paddy fields, proving to be an effective natural fertilizer.
Contents |
Species
- Anabaena aequalis
- Anabaena affinis
- Anabaena angstumalis
- Anabaena angstumalis angstumalis
- Anabaena angstumalis marchica
- Anabaena aphanizomendoides
- Anabaena azollae
- Anabaena bornetiana
- Anabaena catenula
- Anabaena circinalis
- Anabaena confervoides
- Anabaena constricta
- Anabaena cycadeae
- Anabaena cylindrica
- Anabaena echinispora
- Anabaena felisii
- Anabaena flosaquae
- Anabaena flosaquae flosaquae
- Anabaena flosaquae minor
- Anabaena flosaquae treleasei
- Anabaena helicoidea
- Anabaena inaequalis
- Anabaena lapponica
- Anabaena laxa
- Anabaena lemmermannii
- Anabaena levanderi
- Anabaena limnetica
- Anabaena macrospora
- Anabaena macrospora macrospora
- Anabaena macrospora robusta
- Anabaena monticulosa
- Anabaena oscillarioides
- Anabaena planctonica
- Anabaena raciborskii
- Anabaena scheremetievi
- Anabaena sphaerica
- Anabaena spiroides
- Anabaena spiroides crassa
- Anabaena spiroides spiroides
- Anabaena subcylindrica
- Anabaena torulosa
- Anabaena unispora
- Anabaena variabilis
- Anabaena verrucosa
- Anabaena viguieri
- Anabaena wisconsinense
- Anabaena zierlingii
Nitrogen Fixation by Anabaena
Under nitrogen-limiting conditions, vegetative cells differentiate into heterocysts at semi-regular intervals along the filaments. Heterocysts are cells that are terminally specialized for nitrogen fixation. The interior of these cells is microoxic as a result of increased respiration, inactivation of O2-producing photosystem (PS) II, and formation of a thickened envelope outside of the cell wall. Nitrogenase, sequestered within these cells, transforms dinitrogen into ammonium at the expense of ATP and reductant—both generated by carbohydrate metabolism, a process that is supplemented, in the light, by the activity of PS I. Carbohydrate, probably in the form of sucrose, is synthesized in vegetative cells and moves into heterocysts. In return, nitrogen fixed in heterocysts moves into the vegetative cells, at least in part in the form of amino acids.[1]
References
External Links
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
