Pesticidally resistant rhizobium and agronomic use thereof

Details Pesticidally resistant rhizobium and agronomic use thereof Pesticidally resistant rhizobium and agronomic use thereof

1978-04-04

1981-12-15

Wiseman, Thomas G.

Chemistry: molecular biology and microbiology

Micro-organism, per se ; compositions thereof; proces of...

Bacteria or actinomycetales; media therefor

435878, C12N 120, C12R 141

Patent

active

043060277

ABSTRACT:
This invention relates to Rhizobium strains having good infecting and nitrogen-fixing characteristics and which are resistant to fungicides. These strains are produced by cultivating a Rhizobium strain sensitive to a particular fungicide in the presence of an amount of the fungicide, and for a time less than that sufficient to kill the entire Rhizobium population but sufficient to kill a majority of the population. The remaining Rhizobium population is isolated and recultured in the presence of an increased amount of the fungicide, again an amount and a time less than sufficient to kill the entire Rhizobium population, but sufficient to kill a majority of the population. This procedure is repeated for sufficient passages, with increasing amounts of said fungicide, to provide a Rhizobium strain sufficiently resistant to said fungicide so that the Rhizobium strain multiplies and enters into a nitrogen-fixing symbiosis in the presence of agriculturally effective amounts of the fungicide.

REFERENCES:
patent: 3168796 (1965-02-01), Scott et al.
patent: 3616236 (1971-10-01), Delin
patent: 4094097 (1978-06-01), Alexander et al.
Biswas, et al., "Nodulation of Trifolium alexandrium by Penicillin Treated Rhizobium trifolli", Chem. Absts., vol. 82, No. 5, pp. 418 (1975), Abs. No. 30192z.
Namdeo, et al., "Herbicidal influence on Growth Sensitivity and Mutation Transformation in Rizobia", Chem. Absts., vol. 80, No. 1, p. 235 (1974), Abs. No. 26126.
Sud, et al., "Growth Promoting Effect of TCA and Dalapon on Rhizobium Strains", Chem. Absts., vol. 79, No. 9, p. 284 (1973), Abs. No. 52297c.
Kecskes, et al., "Effect of Some Fungicides on Rhizobium leguminosarum species", Chem. Absts., vol. 79, No. 25, p. 70, (1973), Abs. No. 143388z.
Elek, et al., "Effect of Some Seed Treatments Using Microelements and Fungicides on Vetch Plants Grown From Seeds Inoculated with Rhizobia", Chem. Absts., vol. 79, No. 13, p. 123 (1973), Abs. No. 745601c.
Kecskes, et al., "Compatability of Fungicide Treatment and Rhizobium Inoculation of Vetch Seed", Chem. Absts., vol. 79, No. 8, p. 125 (1973), Abs. No. 101547v.
Vincent, "A Manual for the Practical Study of Root-Nodule Bacteria", IBP Handbook No. 15, Blackwell Scientific Publication, Oxford (1970).

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