What is the difference between symbiotic nitrogen fixing bacteria and combined nitrogen fixing bacte

Symbiotic nitrogen-fixing bacteria must rely on symbiosis to survive and have nitrogen-fixing effects, while combined nitrogen-fixing bacteria can both symbiosis and self-growth, and play a joint role.

Symbiosis is mutually beneficial. Alliances are not necessarily mutually beneficial.

Nitrogen-fixing bacteria are a general term for various prokaryotes that can carry out biological nitrogen fixation, including autogenous nitrogen-fixing bacteria, symbiotic nitrogen-fixing bacteria, and combined nitrogen-fixing bacteria; Nitrogen-fixing bacteria can improve soil fertility and turn carbon monoxide into fuel.

Nitrogen-fixing bacteria are a general term for various prokaryotes that can carry out biological nitrogen fixation, and generally it can be divided into three categories, including autogenous nitrogen-fixing bacteria, symbiotic nitrogen-fixing bacteria and combined nitrogen-fixing bacteria. Nitrogenase is extremely sensitive to oxygen, so nitrogen fixation must be carried out under strict anaerobic conditions, which is certainly not a problem for anaerobic nitrogen-fixing bacteria. But most nitrogen-fixing bacteria are aerobic bacteria that must live under aerobic conditions, and here are some mechanisms that protect nitrogenase from oxygen damage.

Vanadium nitrogenase usually produces ammonia from nitrogen, so nitrogen-fixing bacteria can turn carbon monoxide into fuel.

Nitrogen-fixing bacteria are a kind of bacteria that convert nitrogen elements into nitrogen compounds through biological mild reactions, and generally rhizobia is a nitrogen-fixing bacteria * o * hope it will help you!!

The explanation of the word nitrogen-fixing bacteria is: nitrogen-fixing bacteria belong to a family of bacteria.

The explanation of the word nitrogen-fixing bacteria is: nitrogen-fixing bacteria belong to a family of bacteria. Pinyin is: gùdànjūn. The structure is: solid (fully enclosed structure), nitrogen (semi-enclosed structure), bacteria (upper and lower structure).

What is the specific explanation of nitrogen-fixing bacteria, we will introduce it to you through the following aspects:

1. Chinese Speech Banquet [Click here to view the details of the plan].

A microorganism. It belongs to the aerobic rotula brachybacterium. It lives in the soil and can absorb free nitrogen in the air, so that it can become a nitrogen compound that is beneficial to plants, which is quite important in agriculture.

Translation of the words German azobakterie, stickstoffbakterie (chem).

2. Network Explanation.

Nitrogen-fixing bacteriaNitrogen-fixing bacteria belong to a family of bacteria. The thallus is rod-shaped, oval or spherical, without endophytic spores, and negative for Gram stain. Strictly aerobic, organic trophic type, can fix nitrogen in the air.

Silverware includes nitrogen-fixing bacteria, nitromonosporia, Beyellinella, and Dextella spp. Nitrogen-fixing bacteria fertilizers are mostly made from members of the genus Nitrogenus.

Idioms about nitrogen-fixing bacteria.

The summer insects are firmly rooted in the mycorrhizae, and the key name is solid, and I am solid when the deep ditch is solid, and the fortification will be solid, and the solidity will not be completely solid, and it will not be solid.

Words about nitrogen-fixing bacteria.

If the seizing and security are solid, of course, the solidity of the overlay cannot be completely solidified, because it is stubborn, the fortress is deep, the ditch is strong, and the key is deep.

Sentence formation about nitrogen-fixing bacteria.

1. The number of bacteria and nitrogenase activity measured at the yellow ripening stage were lower than those measured at the grain filling stage, and a small number of nitrogen-fixing bacteria and nitrogenase activity could also be detected in the soil.

2. Increase the number of rhizosphere bacteria, nitrogen-fixing bacteria and actinomycetes in crops, and effectively improve soil fertility.

3. Compound fertilizer is conducive to increasing the number of nitrogen-fixing bacteria and potassium bacteria, and ammonium phosphate promotes the growth of the number of phosphorus bacteria.

4. In this paper, the dynamic effects of carbofuran and cadmium single and composite pollution on the number of aerobic autogenous nitrogen-fixing bacteria in soil were studied under laboratory conditions.

5. The results showed that the roots of different tea cultivars had obvious rhizosphere effects on phosphorus and potassium bacteria, but had negative effects on autogenous nitrogen-fixing bacteria.

This is mainly related to the way nitrogen fixation is done by nitrogen-fixing rhizobia.

When self-generating nitrogen-fixing microorganisms live in soil or culture media, they can fix molecular nitrogen in the air on their own, and have no dependence on plants. Common autogenous nitrogen-fixing microorganisms include aerobic autogenous nitrogen-fixing bacteria represented by round-brown nitrogen-fixing bacteria, anaerobic autogenous nitrogen-fixing bacteria represented by Clostridium, and nitrogen-fixing cyanobacteria with heteromorphic cells represented by Anabaena, Candida and Trembling Algae (heteromorphic cells contain nitrogenase and can be used for biological nitrogen fixation).

Symbiotic nitrogen-fixing microorganisms can only fix molecular nitrogen in the air when they are mutually beneficial and symbiotic with plants! That's the point!! Symbiotic nitrogen-fixing microorganisms can be divided into two categories:

One is rhizobia, which are mutually beneficial and symbiotic with leguminous plants, and Frank's actinomycetes, which are symbiotic with non-leguminous plants such as alder, bayberry and sea buckthorn; The other type is cyanobacteria that live in symbiosis with aquatic ferns such as red weeds (also known as Manjianghong) or gymnosperms such as podocarpus. Lichens formed by cyanobacteria and certain fungi also fall into this category.

Self-growing nitrogen-fixing bacteria are bacteria that are able to fix nitrogen independently in soil. Because it is easy to fix a large amount of nitrogen in the laboratory, this organism is mostly used in the study of nitrogen fixation. Most of the autogenous nitrogen-fixing bacteria are bacilli or brevis bacilli, and they are both solitary.

After two or three days of cultivation of the jujube family, the pairs of bacteria are arranged in a "" arrangement, and there is a thick capsule on the outside. It is widely distributed in soil and water in nature, and is a fixed and free nitrogen organism with cyanobacteria, which is generally not suitable for cultivation in an acidic environment. In addition to nitrogen fixation, the bacterium also has extremely high respiratory activity, and the respiratory quotient (Qo2) can be as high as 2000.

Depending on the condition, some species may form cysts.