Cyclic β-1,6 -1,3 glucans are synthesized by Bradyrhizobium japonicum bacteroids within soybean (Glycine max) root nodules

Abstract

We have previously reported that free-living cultures of Bradyrhizobium species produce novel oligosaccharides that are cyclic, contain between 10 and 13 glucose residues, and are linked by β-1,6 and β-1,3 glycosidic bonds (K.J. Miller, R.S. Gore, R. Johnson, A.J. Benesi, V.M. Reinhold [1990] J Bacteriol 172: 136-142). In the present study, we show that these glucans are also synthesized by bacteroids of Bradyrhizobium japonicum USDA 110 within Glycine max root nodules.