Quality and rate of extracellular polysaccharides produced by Rhizobium meliloti and their inducing effect on polygalacturonase production in legume roots as derived from the presence of extrachromosomal DNA
Palomares, A.; Montoya, E.; Olivares, J.
Microbios 22(87): 7-13
1978
ISSN/ISBN: 0026-2633 PMID: 755154 Document Number: 135812
The ability of extracellular polysaccharides of different strains of R. meliloti to induce the production of polygalacturonase by roots of Medicago sativa seedlings was studied. Some strains showed a high inducing ability while those derived from them, after treatment with acridine orange and in which extrachromosomal DNA was absent, did not show this character. A comparative study of polysaccharide production and preliminary studies on the chemical composition of the active fractions obtained after Sephadex G-25 filtration indicated that the monomers which form the active fractions are qualitatively and quantitatively different according to their origin.