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Normand P, Nguyen TV, Battenberg K, Berry AM, Heuvel BV, Fernandez MP, Pawlowski K. Proposal of 'Candidatus Frankia californiensis', the uncultured symbiont in nitrogen-fixing root nodules of a phylogenetically broad group of hosts endemic to western North America. Int J Syst Evol Microbiol 2017; 67:3706-3715. [DOI: 10.1099/ijsem.0.002147] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Philippe Normand
- Université de Lyon, F-69622, Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS, UMR5557, Ecologie Microbienne, Villeurbanne, France; INRA, UMR1418, Villeurbanne, France
| | - Thanh Van Nguyen
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden
| | - Kai Battenberg
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Alison M. Berry
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | | | - Maria P. Fernandez
- Université de Lyon, F-69622, Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS, UMR5557, Ecologie Microbienne, Villeurbanne, France; INRA, UMR1418, Villeurbanne, France
| | - Katharina Pawlowski
- Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden
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Berry AM, Mendoza-Herrera A, Guo YY, Hayashi J, Persson T, Barabote R, Demchenko K, Zhang S, Pawlowski K. New perspectives on nodule nitrogen assimilation in actinorhizal symbioses. FUNCTIONAL PLANT BIOLOGY : FPB 2011; 38:645-652. [PMID: 32480919 DOI: 10.1071/fp11095] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Accepted: 06/10/2011] [Indexed: 06/11/2023]
Abstract
Nitrogen-fixing root nodules are plant organs specialised for symbiotic transfer of nitrogen and carbon between microsymbiont and host. The organisation of nitrogen assimilation, storage and transport processes is partitioned at the subcellular and tissue levels, in distinctive patterns depending on the symbiotic partners. In this review, recent advances in understanding of actinorhizal nodule nitrogen assimilation are presented. New findings indicate that Frankia within nodules of Datisca glomerata (Presl.) Baill. carries out both primary nitrogen assimilation and biosynthesis of arginine, rather than exporting ammonium. Arginine is a typical storage form of nitrogen in plant tissues, but is a novel nitrogen carrier molecule in root nodule symbioses. Thus Frankia within D. glomerata nodules exhibits considerable metabolic independence. Furthermore, nitrogen reassimilation is likely to take place in the host in the uninfected nodule cortical cells of this root nodule symbiosis, before amino acid export to host sink tissues via the xylem. The role of an augmented pericycle in carbon and nitrogen exchange in root nodules deserves further attention in actinorhizal symbiosis, and further highlights the importance of a comprehensive, structure-function approach to understanding function in root nodules. Moreover, the multiple patterns of compartmentalisation in relation to nitrogen flux within root nodules demonstrate the diversity of possible functional interactions between host and microsymbiont that have evolved in the nitrogen-fixing clade.
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Affiliation(s)
- Alison M Berry
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Alberto Mendoza-Herrera
- Centro de Biotecnología Genómica, Instituto Politécnico Nacional, 88710 Reynosa, Tamaulipas, Mexico
| | - Ying-Yi Guo
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Jennifer Hayashi
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Tomas Persson
- Department of Botany, Stockholm University, 10691 Stockholm, Sweden
| | - Ravi Barabote
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
| | - Kirill Demchenko
- Komarov Botanical Institute, Russian Academy of Sciences, St Petersburg 197376, Russia
| | - Shuxiao Zhang
- Department of Plant Sciences, University of California, Davis, CA 95616, USA
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Berry AM, Murphy TM, Okubara PA, Jacobsen KR, Swensen SM, Pawlowski K. Novel expression pattern of cytosolic Gln synthetase in nitrogen-fixing root nodules of the actinorhizal host, Datisca glomerata. PLANT PHYSIOLOGY 2004; 135:1849-62. [PMID: 15247391 PMCID: PMC519095 DOI: 10.1104/pp.103.031534] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2003] [Revised: 04/14/2004] [Accepted: 05/02/2004] [Indexed: 05/24/2023]
Abstract
Gln synthetase (GS) is the key enzyme of primary ammonia assimilation in nitrogen-fixing root nodules of legumes and actinorhizal (Frankia-nodulated) plants. In root nodules of Datisca glomerata (Datiscaceae), transcripts hybridizing to a conserved coding region of the abundant nodule isoform, DgGS1-1, are abundant in uninfected nodule cortical tissue, but expression was not detectable in the infected zone or in the nodule meristem. Similarly, the GS holoprotein is immunolocalized exclusively to the uninfected nodule tissue. Phylogenetic analysis of the full-length cDNA of DgGS1-1 indicates affinities with cytosolic GS genes from legumes, the actinorhizal species Alnus glutinosa, and nonnodulating species, Vitis vinifera and Hevea brasilensis. The D. glomerata nodule GS expression pattern is a new variant among reported root nodule symbioses and may reflect an unusual nitrogen transfer pathway from the Frankia nodule microsymbiont to the plant infected tissue, coupled to a distinctive nitrogen cycle in the uninfected cortical tissue. Arg, Gln, and Glu are the major amino acids present in D. glomerata nodules, but Arg was not detected at high levels in leaves or roots. Arg as a major nodule nitrogen storage form is not found in other root nodule types except in the phylogenetically related Coriaria. Catabolism of Arg through the urea cycle could generate free ammonium in the uninfected tissue where GS is expressed.
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Affiliation(s)
- Alison M Berry
- Department of Environmental Horticulture, University of California, Davis, California 95616, USA.
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