Gifted species - biological nitrogen-fixation, Biology

Gifted Species - Biological Nitrogen-Fixation

Biological nitrogen fixation remains mainly confined to a few distinct nutritional types of prokaryotes, some of which are free-living while others live in symbiotic association with eukaryotic partners. This process contributes annually about 6O% to the earth's newly fixed nitrogen budget. Table shows the ranges and types of biological nitrogen fixers. They have been variously classified as free living or symbiotic (Rhizobium-legume association). Free-living can further be classified into phototrophic (Nostoc), chemotrophic (Klebsiella), aerobic (Azotobacter) or anaerobic (Chromatium) depending upon the state of existence and mode of nutrition. Agronomically the most important nitrogen fixing systems are Rhizobium-legume association, Frankia (actinorhiza1)-woody plant association, Anabaena-Azolle and Cyanobacteria-rice system. Rhizobium-legume association as you will know invariably occurs in the form of root nodules.

Table: Examples of Gifted Species

7_Gifted Species - Biological Nitrogen-Fixation.png

Posted Date: 1/17/2013 4:51:42 AM | Location : United States







Related Discussions:- Gifted species - biological nitrogen-fixation, Assignment Help, Ask Question on Gifted species - biological nitrogen-fixation, Get Answer, Expert's Help, Gifted species - biological nitrogen-fixation Discussions

Write discussion on Gifted species - biological nitrogen-fixation
Your posts are moderated
Related Questions
Nutrient Availability You have seen that cation exchange plays an important part in nutrient availability to plants. Cation exchange functions in two ways as nutrients are rele

What is mucoperiosteal flap Silk is easy to handle, ties with a slip knot, and is relatively inexpensive compared with other nonabsorbable suture materials currently available.

a) Indicate the blood types possible from the mating of a male who is blood type O with a female of blood type AB. b) Could a female with blood type AB ever produce a child with bl

How different are gymnosperms from pteridophytes and bryophytes? Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form see

Photosynthesis Photosynthesis - the process by which plants utilise energy from sunlight to convert carbon dioxide and water for the synthesis of sugar. This sugar can then be

Heat production and respiratory quotient for foodstuff types The heat produced during the metabolic activities of the body helps in maintaining the body temperature. Generally

The nucleus comprise the genetic information of cell. In addition to activities which maintain the cell, nucleus creates copies of itself for new protozoans by either asexual repro

What is Gymnosperms explain its dividions? Gymnosperms are one of the two major groups of plants that bear seeds. The other group, the Angiosperms (flowering plants), differ in

The use of the gums in various foods may affect the following functional properties: 1. Water-binding capacity 2. Rheological properties 3.  Capacity to form film or gel

Pathophysiology Asthma result from several physiological alterations, including altered immunologic response, increased airways resistance, increased lung-compliance, impaire