What is the role of Azotobacter and Bacillus polymyxa?

Solution : Azotobacter and Bacillus polymyxa are free living or non-symbiotic nitrogen fixing bacteria of soil, which increase fertility of soil and hence yield of crop plants.

Is Bacillus polymyxa free living nitrogen fixing bacteria?

Complete Answer: – Non symbiotic nitrogen fixers are free- living bacteria,such as Azotobacter and Bacillus polymyxa are soil bacteria. they fix free nitrogen of the air and enrich the soil. This nitrogen is utilised by the crops like cereals, millets, fruits and vegetables.

Is azotobacter is aerobic or anaerobic?

aerobic
They are aerobic, free-living soil microbes that play an important role in the nitrogen cycle in nature, binding atmospheric nitrogen, which is inaccessible to plants, and releasing it in the form of ammonium ions into the soil (nitrogen fixation).

What is required for nitrogen fixation by Rhizobium?

It plays an important role in nitrogen fixation by nodule formation and provides energy for this process. Therefore, phosphorus is required for nitrogen fixation by Rhizobium. Hence, the correct option is (B) Phosphorus.

Which organisms fix nitrogen in the soil?

Many heterotrophic bacteria live in the soil and fix significant levels of nitrogen without the direct interaction with other organisms. Examples of this type of nitrogen-fixing bacteria include species of Azotobacter, Bacillus, Clostridium, and Klebsiella.

Which of the following is a pair of Biofertilizer?

So, the correct answer is ‘(a) Azolla and BGA’.

Is Bacillus a nitrogen fixing bacteria?

Which one does not fix nitrogen?

Spirogyra is one of the commonest green algae. It has no function in nitrogen fixation.

Is Bacillus anaerobic or aerobic?

bacillus, (genus Bacillus), any of a genus of rod-shaped, gram-positive, aerobic or (under some conditions) anaerobic bacteria widely found in soil and water. The term bacillus has been applied in a general sense to all cylindrical or rodlike bacteria. The largest known Bacillus species, B.

Is Azotobacter and acetobacter same?

What is the difference between Azotobacter and Acetobacter? Azotobacter is a nitrogen-fixing bacteria. On the other hand, Acetobacter is an acetic acid bacteria that are able to convert sugars and alcohols to acetic acid by the process of oxidation.

Is azotobacter a nitrogen-fixing bacteria?

Azotobacter is a group of Gram negative, free-living, nitrogen fixing aerobic bacteria inhabiting in the soil. They are oval or spherical in shape and form thick-walled cysts (dormant cells resistant to deleterious conditions) under unfavorable environmental conditions.

What is azotobacter biofertilizer?

It is a biofertilizer that contains non-symbiotic Azotobacter bacteria which has the ability to fix atmospheric Nitrogen. It is recommended for non-leguminous crops like Paddy, Wheat, Millets, Cotton, Tomato, Cabbage, Mustard, Safflower, Sunflower, etc..