| isolation of azospirullum from diverse geographic regions. | we have isolated azospirillum (spirullum lipoferum) from roots of grasses of several genera collected from a number of tropical and subtropical-temperate locations. pure cultures were obtained from a small percentage of samples; no higher percentage was secured from tropical than from other grasses. acetylene reduction and distinctive growth in n-free soft agar deeps were inadequate to identify this genus, although helpful in initial screening. fluorescent antibody tests with antiserum against c ... | 1979 | 476547 |