Enhancement of nitrogen fixation with Bradyrhizobium japonicum m

Details Enhancement of nitrogen fixation with Bradyrhizobium japonicum m Enhancement of nitrogen fixation with Bradyrhizobium japonicum m

1989-03-17

1991-06-04

Robinson, Douglas W.

Chemistry: fertilizers

Processes and products

Bacterial

435 41, 4352522, 435878, C12P 0104, C12N 0120, C05F 1108

Patent

active

050210769

ABSTRACT:
A prototrophic revertant of a Bradyrhizobium japonicum tryptophan auxotroph was isolated and found to fix more nitrogen symbiotically than wild-type bacteria. The increase in nitrogen fixation is due to an increase in nodule mass because of an increase in nodule number. The physiological basis for this improved symbiosis appears to be an alteration of the tryptophan biosynthetic pathway.

REFERENCES:
patent: 4711656 (1987-12-01), Kaneshiro
S. E. Wells and L. D. Kuykendall, "Tryptophan Auxotrophs of Rhizobium japonicum", J. Bacteriol. 156(3): 1356-1358 (1983).
W. J. Hunter, "Influence of 5-Methyltryptophan-Resistant Bradyrhizobium japonicum on Soybean Root Nodule Indole-3-Acetic Acid Content", Appl. Environ. Microbiol. 53(5): 1051-1055 (1987).
T. Kaneshiro and W. F. Kwolek, "Stimulated Nodulation of Soybeans by Rhizobium japonicum Mutant (B-14075) that Catabolizes the Conversion of Tryptophan to Indol-3yl-Acetic Acid", Plant Sci. 42: 141-146 (1985).
W. J. Hunter, "Increased Symbiotic Nodulation and Nitrogen Fixation by a 5-Methyltryptophan Resistant Bradyrhizobium japonicum", Abstract 861, Suppl. Plant Physiol. 86(4): 144 (Apr. 1988).
Kuykendall, L. D., "Isolation and Identification of Genetically Marked Strains of Nitrogen-Fixing Microsymbionts of Soybeans", Symbiotic Nitrogen Fixation Technology, N.Y., N.Y., Marcel Dekker Inc., 1987.

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