‘Nif’ and ‘hup’ genes
Raymond C. Valentine, Plant Growth Laboratory and Agronomy and Range Science
California Agriculture 36(8):10-10. DOI: 10.3733/ca.v036n08p10a.
Not available – first paragraph follows:
All crops need nitrogen for growth. Nitrogen fixation—the enzymatic conversion of atmospheric nitrogen gas into a form available to the plant—is a trait that only some bacteria have evolved.
Raymond C. Valentine, Professor, Plant Growth Laboratory and Agronomy and Range Science, U.C., Davis.