The author Michael Pollan wrote some passages describing how pigs have manipulated humans into a symbiotic relationship whereby the pig population has been able to explode beyond its natural boundaries through the help and support of mankind in exchange for food. Much like a plant giving carbon to fungi or bacteria when it needs something if I can be allowed the parallel. If I really think about GMO, my first concern would be my position in nature as a food source. There are so many fungi and bacteria that we cannot resist, and the numbers are vast.
Interesting research...but gardeners have known for centuries that N2 can be added naturally to their garden soils. As the article says. "Legumes are the only crops with bacteria capable of pulling nitrogen from the air through a process called “fixation.”