Nonpigmented and Bacteriochlorophyll-Containing Bradyrhizobia Isolated from Aeschynomene indica.

Applied and Environmental Microbiology
P van BerkumD L Keister

Abstract

The legume genus Aeschynomene is unusual, since many species develop stem nodules and the bradyrhizobia isolated from these nodules produce bacteriochlorophyll (Bchl). Evidence is presented that the bradyrhizobia of Aeschynomene indica have wide distribution throughout the world, since A. indica was nodulated when grown in 58 soils collected in 14 different countries. Only 38 of 79 isolates tested synthesized Bchl and carotenoids during heterotrophic growth. Nine isolates produced Bchl constitutively, and cultures were pigmented after growth in the dark. The other isolates required light for Bchl production. The DNA from seven pigmented and three nonpigmented bradyrhizobia hybridized with a DNA probe containing the genes for the photosynthetic apparatus of Rhodobacter capsulatus, but DNA from two other nonpigmented isolates did not hybridize with this probe. A relationship between pigmentation in culture and symbiotic phenotype was not evident, since bradyrhizobia of both Bchl phenotypes nodulated stems of A. indica and formed nitrogen-fixing symbioses. Several isolates, which were ineffective on A. indica, probably do belong to the proposed cross-inoculation group 3 (D. Alazard, Appl. Environ. Microbiol. 50:732-734, 1985), sin...Continue Reading

References

Nov 7, 1975·Archives of Microbiology·P F WeaverH Gest
Feb 1, 1994·Applied and Environmental Microbiology·P van BerkumA A Vargas
Sep 1, 1985·Applied and Environmental Microbiology·D Alazard
Nov 1, 1990·Applied and Environmental Microbiology·W R EvansN S Rao
Dec 1, 1990·Applied and Environmental Microbiology·P van Berkum
Dec 1, 1993·Applied and Environmental Microbiology·R B NavarroP van Berkum
Jun 1, 1943·Journal of Bacteriology·L T Leonard

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Citations

Oct 7, 2014·Microbes and Environments·Kamonluck TeamtisongNeung Teaumroong
Dec 13, 2000·Proceedings of the National Academy of Sciences of the United States of America·E GiraudB Dreyfus
Mar 2, 2002·Applied and Environmental Microbiology·Peter van Berkum, Bertrand D Eardly
Jul 21, 2006·Journal of Bacteriology·Peter van BerkumBertrand D Eardly
Sep 10, 2005·Photosynthesis Research·Eric Giraud, Darrell Fleischman
May 12, 1998·Biochimica Et Biophysica Acta·D Fleischman, D Kramer

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