Symbiotic nitrogen-fixing bacteria of American and African perennial clover plants

Rhizobium leguminosarum biovar trifolii WSM2304. This biovar is a symbiont of clover plants and is important commercially as it is used in the agricultural industry. Strain WSM1325 is compatible with many perennial clovers of American and African origin used in farming, and is therefore one of the most important clover inoculants but is incompatible with Mediterranean perennial clovers, such as those nodulated by the dissimilar strain WSM1325.