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Literature DB >> 11702406

Azide-resistant mutants of Azorhizobium caulinodans with enhanced symbiotic effectiveness.

Abstract

Azide-resistant mutants of Azorhizobium caulinodans strains Sb3, S78, SrR13 and SrS8 were isolated and screened for nitrate reductase activity. Selected nitrate reductase negative mutants were inoculated on Sesbania bispinosa and S. rostrata under sterile conditions in chillum jars to study their symbiotic behavior. Azide-resistant mutants exhibited either similar or higher symbiotic effectiveness than the parent strain after 30 d of plant growth. Nodule mass, nitrogenase activity and uptake hydrogenase activity of the mutants varied depending on the host as well as on the plant growth stage. In comparison to wild-type parent strains, four azide-resistant mutants, Sb3Az18, S78Az21, SrR13Az17 and SrS8Az6 showed significant increase in nodulation and nitrogen fixation as well as shoot dry mass of the inoculated plants.

Entities: Chemical Species

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Year: 2001 PMID： 11702406 DOI： 10.1007/bf02818536

Source DB: PubMed Journal: Folia Microbiol (Praha) ISSN： 0015-5632 Impact factor: 2.099

11 in total

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Authors: B L Trumpower; R B Gennis
Journal: Annu Rev Biochem Date: 1994 Impact factor: 23.643

Azide-resistant mutants of Azorhizobium caulinodans with enhanced symbiotic effectiveness.

1. Symbiotic effectiveness and n(2) fixation in nodulated soybean.

2. Nitrite and nitric oxide as inhibitors of nitrogenase from soybean bacteroids.

Review 3. Rhizobium symbiosis: nod factors in perspective.

4. Genetic organization of the hydrogen uptake (hup) cluster from Rhizobium leguminosarum.

Review 5. The Rhizobium-plant symbiosis.

Review 6. Energy transduction by cytochrome complexes in mitochondrial and bacterial respiration: the enzymology of coupling electron transfer reactions to transmembrane proton translocation.

Review 7. Genetic regulation of nitrogen fixation in rhizobia.

8. Effect ofLupinus seed diffusates onBradyrhizobium sp. growth and nodulation of lupine.

9. Isolation of a Rhizobium phaseoli cytochrome mutant with enhanced respiration and symbiotic nitrogen fixation.

Review 10. Metabolic activation of the mutagen azide in biological systems.

1. Preincubation of Mesorhizobium ciceri with flavonoids improves its nodule occupancy.

2. Competition among Bradyrhizobium strains for nodulation of green gram (Vigna radiata): use of dark-nodule strain.