Soil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.

Soil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter54: Community Ecology

Section: Chapter Questions

Problem 14TYU: Many plants that produce nodules for nitrogen-fixing bacteria are common on disturbed sites. Explain...

See similar textbooks

Similar questions

. Describe in basic terms the process of biological nitrogen fixation,why it is important, and how oxygen interferes with this process.
How do the nitrogen-fixing genera Azospirillum and Rhizobium associate with plant roots? Rhizobium stays on the outside of the roots of tropical grasses, while Azospirillum grows inside the roots of legumes. Azospirillum and Rhizobium both stay on the outside of roots. Azospirillum stays on the outside of the roots of tropical grasses, while Rhizobium grows inside the roots of legumes. Azospirillum and Rhizobium both grow inside specialized root cells.
Why is nitrogen fixation so energetically costly?
One of the most widely known symbioses between microorganisms and plants is that of rhizobia and legumes. The basis of this mutualistic, symbiotic relationship can be described by which of the following statements? Actually, all of these are accurate descriptions of the symbiosis between rhizobia and plants. Rhizobia help the plants expand access to minerals in the soil while the plant protects the rhizobia from predators and viruses. The rhizobia will conduct photosynthesis which allow the plants to access carbon without having to deplete their own energy to do carbon fixation. The rhizobia fix nitrogen for the plant while the plant fixes carbon which it shares with the rhizobia. The rhizobia will produce oxygen which will help the soil to maintain oxygenation and thus avoid pathogens.
In terms of the nitrogen cycle and movement of electrons, what is the difference between nitrogen fixation and assimilatory nitrate reduction
Soil could be deficient in any of the following nutrients. If you had to supply one of these to the soil, which would be required in the smallest amount? Nitrogen 2. Potassium 3. Phosphorus 4. Sulfur 5. Iron
Which of the following organisms improves nitrogen status in legumes? Select one: a. Nitrate reductase b. Rhizobium c. Glutathione d. Mycorrhizae e. Pseudomonas
What product is generated by assimilation in the nitrogen cycle.
denitrification occure in wetland soil because - 1 - The top thin layer of soil is oxidized and the soil layer below is reduced. 2 - The top thin layer of soil is reduced and the soil layer below is oxidized 3 - The top thin layer of soil is oxidized and the soil layer below is also oxidized. 4 - The top thin layer of soil in reduced and the soil layer below is also reduced
Whichof the following is NOT an agent of nitrogen fixation?a.Mycorrhizal fungib.Cyanobacteria (blue-green algae)c.Bacteria associated with legume rootsd.Lightninge.Actinomycete bacteria associated with alder roots
How do Biofertilisers enrich the fertility of soil? How does cyanobacteria acts as biofertiliser?
In not more than 200 words or 5 sentences, answer or explain the following situation. In a seagrass ecosystem, nutrients restrict primary production under low nutrient (oligotrophic) conditions, while light becomes the limiting factor under high nutrient (eutrophic) conditions. Discuss how this happens with respect to the three primary producers (seagrass, macroalgae, phytoplankton) as the condition changes from oligotrophic to eutrophic.