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. 1980 Feb;39(2):297-301.
doi: 10.1128/aem.39.2.297-301.1980.

Promotion of infection thread formation by substances from Rhizobium

S Higashi  1 , M Abe
Affiliations

Promotion of infection thread formation by substances from Rhizobium

S Higashi et al. Appl Environ Microbiol. 1980 Feb.

Abstract

An extrinsic substance (ES-6000) was isolated from the periplasmic space of Rhizobium trifolii (strain 4S) cells by osmotic shock, using a high-density sucrose solution. This substance promoted infection thread formation in root hairs of white clover when inoculated together with the infectious strain (4S). However, ES-6000 obtained from another rhizobial species and from strain A1, which is a noninfectious mutant strain obtained from strain 4S, did not have this effect. The promoter in the ES-6000 from strain 4S is a relatively small molecule since it passed through a hollow-fiber membrane (molecular weight, 6,000). This substance was also recognized as an R(f) 0.1 fraction by paper chromatography. Sucrose was effective in promoting nodulation and root elongation.

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References

    1. Appl Microbiol. 1975 Dec;30(6):1017-33 - PubMed
    1. Can J Microbiol. 1974 Aug;20(8):1169-81 - PubMed
    1. J Biol Chem. 1967 May 25;242(10):2561-9 - PubMed
    1. J Bacteriol. 1969 Mar;97(3):1184-91 - PubMed
    1. J Bacteriol. 1966 Jul;92(1):204-13 - PubMed

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