PMID: 9159400May 1, 1997Paper

The Rhizobium meliloti PII protein, which controls bacterial nitrogen metabolism, affects alfalfa nodule development

Genes & Development
T ArcondéguyDaniel Kahn

Abstract

Symbiotic nitrogen fixation involves the development of specialized organs called nodules within which plant photosynthates are exchanged for combined nitrogen of bacterial origin. To determine the importance of bacterial nitrogen metabolism in symbiosis, we have characterized a key regulator of this metabolism in Rhizobium meliloti, the uridylylatable P(II) protein encoded by glnB. We have constructed both a glnB null mutant and a point mutant making nonuridylylatable P(II). In free-living conditions, P(II) is required for expression of the ntrC-dependent gene glnII and for adenylylation of glutamine synthetase I. P(II) is also required for efficient infection of alfalfa but not for expression of nitrogenase. However alfalfa plants inoculated with either glnB mutant are nitrogen-starved in the absence of added combined nitrogen. We hypothesize that P(II) controls expression or activity of a bacteroid ammonium transporter required for a functional nitrogen-fixing symbiosis. Therefore, the P(II) protein affects both Rhizobium nitrogen metabolism and alfalfa nodule development.

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Citations

Jul 21, 2004·Nature Reviews. Microbiology·Ray Dixon, Daniel Kahn
Sep 4, 1999·The Plant Journal : for Cell and Molecular Biology·S R RawatA D Glass
Nov 21, 2008·Proceedings of the National Academy of Sciences of the United States of America·Svetlana N Yurgel, Michael L Kahn
Nov 15, 2011·Molecular Plant-microbe Interactions : MPMI·Svetlana N YurgelMichael L Kahn
May 31, 2002·Molecular Plant-microbe Interactions : MPMI·Simona FerraioliEduardo J Patriarca
Jun 11, 2003·Molecular Plant-microbe Interactions : MPMI·Michael A DjordjevicUNKNOWN Sinorhizobium DNA Sequencing Consortium
Mar 29, 2001·Journal of Bacteriology·P A RudnickD Kahn
Mar 10, 2001·Microbiology and Molecular Biology Reviews : MMBR·T ArcondéguyM Merrick
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Nov 13, 1998·Proceedings of the National Academy of Sciences of the United States of America·M H HsiehG Coruzzi
Mar 6, 1998·Molecular Plant-microbe Interactions : MPMI·R TatéE J Patriarca
Sep 7, 2000·Molecular Plant-microbe Interactions : MPMI·S H NateraM A Djordjevic
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Aug 7, 2012·FEMS Microbiology Reviews·Luciano F HuergoMike Merrick
Nov 24, 2004·FEMS Microbiology Letters·Marcela DavalosDaniel Kahn
Dec 24, 2018·Molecular Plant-microbe Interactions : MPMI·Kathrin Wippel, Sharon R Long
Dec 15, 2016·Frontiers in Microbiology·Kelly L HagbergMichael L Kahn
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