Enhancement of nitrogen-fixation with rhizobial tan variants

Chemistry: fertilizers – Processes and products – Bacterial

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C05F 1108

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047116560

ABSTRACT:
Legumes inoculated with tryptophan catabolic variants (tan variants) of wild-type bradyrhizobia are characterized by an enhanced capacity to fix atmospheric nitrogen as compared to parent strains. Responses of the symbiotic system to the variants include an auxinic stimulation of root growth, an enhancement of nodulation, and an increase in the nitrogen-fixation activities of the nodulated root systems.

REFERENCES:
patent: 4136486 (1979-01-01), Franklin, Jr. et al.
J. Badenoch-Jones et al., "Mass Spectrometric Identification of Indole Compounds Produced by Rhizobium Strains," Biomed. Mass Spec. 9(10): 429-437 (1982).
T. L. Wang et al., "Growth Regulators, Rhizobium and Nodulation in Peas . . . " Planta 155: 345-349 (1982).
T. Kaneshiro et al., "Tryptophan Catabolism to Indolepyruvic and Indoleacetic Acids by Rhizobium japonicum L-259 Mutants," Current Microbiol. 8: 301-306 (1983).
T. Kaneshiro et al., "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).

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