THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA)

Jording D, UHDE C, SCHMIDT R, Pühler A (1994)
EXPERIENTIA 50(10): 874-883.

Journal Article | Published | English

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Abstract
The Rhizobium meliloti C-4-dicarboxylate transport (Dct) system is essential for an effective symbiosis with alfalfa plants. C-4-dicarboxylates are the major carbon source taken up by bacteroids. Genetic analysis of Dct-mutant strains led to the isolation of the dct carrier gene dctA and the regulatory genes dctB and dctD. The carrier gene dctA is regulated in free-living cells by the alternative sigma factor RpoN and the two-component regulatory system DctB/D. In addition, DctA is involved in its own regulation, possibly by interacting with DctB. In bacteroids, besides the DctB/DctD system an additional symbiotic activator is thought to be involved in dctA expression. Further regulation of dctA in the free-living state is reflected by diauxic growth of rhizobia, with succinate being the preferred carbon source. The tight coupling of C-4-dicarboxylate transport and nitrogen fixation is revealed by a reduced level of C-4-dicarboxylate transport in nitrogenase negative bacteroids.
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Jording D, UHDE C, SCHMIDT R, Pühler A. THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA). EXPERIENTIA. 1994;50(10):874-883.
Jording, D., UHDE, C., SCHMIDT, R., & Pühler, A. (1994). THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA). EXPERIENTIA, 50(10), 874-883.
Jording, D., UHDE, C., SCHMIDT, R., and Pühler, A. (1994). THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA). EXPERIENTIA 50, 874-883.
Jording, D., et al., 1994. THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA). EXPERIENTIA, 50(10), p 874-883.
D. Jording, et al., “THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA)”, EXPERIENTIA, vol. 50, 1994, pp. 874-883.
Jording, D., UHDE, C., SCHMIDT, R., Pühler, A.: THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA). EXPERIENTIA. 50, 874-883 (1994).
Jording, Doris, UHDE, C, SCHMIDT, R, and Pühler, Alfred. “THE C-4-DICARBOXYLATE TRANSPORT-SYSTEM OF RHIZOBIUM-MELILOTI AND ITS ROLE IN NITROGEN-FIXATION DURING SYMBIOSIS WITH ALFALFA (MEDICAGO-SATIVA)”. EXPERIENTIA 50.10 (1994): 874-883.
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