Synthesis of Coenzyme R by Certain Rhizobia and by Azotobacter chroococcum
Abstract
Receive: RSS Feeds, eTOCs, free email alerts (when new articles cite this article), more» Information about commercial reprint orders: http://jb.asm.org/site/misc/reprints.xhtml To subscribe to to another ASM Journal go to: http://journals.asm.org/site/subscriptions/ Bureau of Agricultural Chemistry and Engineering, U. S. Department of Agriculture, Washington, D. C. Received for publication August 1, 1939 A recent paper (Allison and Minor, 1938) from this laboratory pointed out that an occasional strain of Rhizobium grows well in a medium not supplied with the essential growth substance, coenzyme R, although most of the rapidly growing strains tested required its addition. Only one of 27 strains of R. trifol ii, R. leguminosarum, R. meliloti, and R. phaseoli grew appreciably without this material, and even this strain responded to it. Simultaneous experiments with additional species showed, however, that a few fast-growing strains make practically no response to coenzyme R. In earlier work (Allison, Hoover and Burk, 1933; Hoover and Allison, 1935) it had been pointed out that Azotobacter vinelandii and certain other bacteria synthesize the substance. Tests (Allison and Minor, 1938, p. 481) with rhizobia that grow without coenzyme R additions also showed synthesis. This paper presents quantitative data and other pertinent information relating to this synthesis