Development Of Bnf And Nitrogen Assimilatory Processes In Nodules

Most of the bacterial genes that are specifically induced in bacteroids appear to be regulated, at least in part, by O2. This is not surprising since, as mentioned earlier, the nodule structure and function are designed to provide a microaerobic environment for BNF. The outer cortex of the nodule is aerobic but beyond this region toward the interior of the nodule there is a significant drop in O2 concentration. A low O2 level within the nodule is essential since the nitrogenase enzyme is very O2 labile. However, the low O2 level of the nodule interior creates a paradoxical situation for the rhizobial symbiont whose metabolism is totally dependent on O2 (i.e., obligate aerobe). To circumvent the problem that rhizobia are obligate


Was this article helpful?

0 0
Worm Farming

Worm Farming

Do You Want To Learn More About Green Living That Can Save You Money? Discover How To Create A Worm Farm From Scratch! Recycling has caught on with a more people as the years go by. Well, now theres another way to recycle that may seem unconventional at first, but it can save you money down the road.

Get My Free Ebook

Post a comment