ABSTRACT Alfalfa, like other legumes, establishes a symbiotic relationship with the soil bacteria, _Sinorhizobium meliloti_, which results in the formation of the root nodules. Nodules contain the bacteria enclosed in a membrane-bound vesicle, the symbiosome where it fixes atmospheric N2 and converts it into ammonia using the bacterial enzyme, nitrogenase. The ammonia released into the cytoplasm from the symbiosome is ...
Read more