plant biotech- How Rhiobium absorbs N2 from atmosphere?

[barathvaj]

My lecturer taught me the molecular mechanism about how Rhizobium makes interaction with plants and how it converts N2 as Ammonia. My doubt is

How it is done?

Rhizobium is a soil bacteria and it is a anerobic. .It cause Root Nodules under the soil. .

Then,How atmospheric nitrogen is absorbed for N2 fixation?

Plz clear my doubts.

[JackBean]

Simply, the soil contains little air as well as water with air gases in it.

[barathvaj]

Ok, but how Rhizobium Absorbs that nitrogen from that air gap?