Carbon metabolism in Bradyrhizobium japonicum bacteroids |
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| Authors: | Timothy R. McDermott Stephen M. Griffith Carroll P. Vance Peter H. Graham |
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| Affiliation: | Rhizobium Research Laboratory, Department of Soil Science, University of Minnesota, St. Paul, MN 55108, U.S.A.;National Forage Seed Production Research Center, Oregon State University, Corvallis, OR 97331, U.S.A.;USDA-ARS and Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, U.S.A. |
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| Abstract: | ![]()
Abstract Carbon metabolism in Bradyrhizobium japonicum bacteroids is reviewed. Additionally, the bacteroid tricarboxylic acid (TCA) cycle and its regulation under oxygen-limited conditions is considered, with emphasis on possible sites of TCA cycle rate-limiting reactions. Furthermore, we consider other adaptive pathways that may be employed by these organisms while in symbiosis. These pathways include: (1) a poly-β-hydroxy-butyrate shunt, (2) a malate-aspartate shuttle, (3) an α-ketoglutarate-glutamate shunt, (4) a modified dicarboxylic acid cycle, and (5) fermentation pathways leading to lactate, acetaldehyde and ethanol. The effects of oxygen limitation on host carbon metabolism are also considered briefly. |
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| Keywords: | TCA cycle Regulation PHB Fermentation |
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