I read that rhizobium carry the enzyme nitrogenase, which is irreversibly damaged upon the exposure of oxygen. Inside the root nodule of legumes leg-haemoglobin keeps a microaerophilic environment where nitrogenase enzyme can function and molecular nitrogen can be fixed.

Shouldn't therefore Rhizobium bacteria die in such microaerophilic condition inside the root nodules?

I read that rhizobium carry the enzyme nitrogenase, which is irreversibly damaged upon the exposure of oxygen. Inside the root nodule of legumes leg-haemoglobin keeps a microaerophilic environment where nitrogenase enzyme can function and molecular nitrogen can be fixed (source: Brock's Biology of Microorganisms).

Shouldn't therefore Rhizobium bacteria die in such microaerophilic condition inside the root nodules?

Shouldn't they die in such microaerophilic condition inside the root nodules

I read that rhizobium carry the enzyme nitrogenase, which is irreversibly damaged upon the exposure of oxygen. Inside the root nodule of legumes leg-haemoglobin keeps a microaerophilic environment where nitrogenase enzyme can function and molecular nitrogen can be fixed.

Shouldn't therefore Rhizobium bacteria die in such microaerophilic condition inside the root nodules?