AUXIN CONTENT AUXIN CATABOLISM AND GROWTH OF RHIZOBIUM

Rhizobium is cultivated on a synthetic medium in presence of tryptophan. The exponential phase in the bacterial growth is over after three days. During the stationary phase, the IAA content of the medium continues to increase regularly after four days. The auxin degradation by cell-free preparations of 4, 8, 12-day old cultures decreases with time. These correlations between auxin catabolism, IAA content and bacterial growth are compared with those described in tissues of higher plants. © 1969 Springer-Verlag.