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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Stacey, G. Rodriguez-quinones, F. Keyser, H. H. Cregan, P. B. Gottfert, M. Sadowsky, M. J. Sharma, A. Gerhold, D. Hennecke, H. |
| Description | Author Affiliation: Sadowsky MJ ( Soil Science Department, University of Minnesota, St. Paul 54108.); |
| Abstract | Several soybean genotypes have been identified which specifically exclude nodulation by members of Bradyrhizobium japonicum serocluster 123. We have identified and sequenced a DNA region from B. japonicum strain USDA 110 which is involved in genotype-specific nodulation of soybeans. This 2.3-kilobase region, cloned in pMJS12, allows B. japonicum serocluster 123 isolates to form nodules on plants of serogroup 123-restricting genotypes. The nodules, however, were ineffective for symbiotic nitrogen fixation. The nodulation-complementing region is located approximately 590 base pairs transcriptionally downstream from nodD2. The 5' end of pMJS12 contains a putative open reading frame (ORF) of 710 base pairs, termed nolA. Transposon Tn3-HoHo mutations only within the ORF abolished nodulation complementation. The N terminus of the predicted nolA gene product has strong similarity with the N terminus of MerR, the regulator of mercury resistance genes. Translational lacZ fusion experiments indicated that nolA was moderately induced by soybean seed extract and the isoflavone genistein. Restriction fragments that hybridize to pMJS12 were detected in genomic DNAs from both nodulation-restricted and -unrestricted strains. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 2 |
| Volume Number | 88 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1991-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Bacterial Proteins Genetics Genes, Bacterial Rhizobiaceae Soybeans Physiology Transcription Factors Amino Acid Sequence Cloning, Molecular DNA, Bacterial Isolation & Purification Genetic Complementation Test Genotype Molecular Sequence Data Open Reading Frames Plasmids Restriction Mapping Sequence Homology, Nucleic Acid Comparative Study Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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