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Soto-Cerda BJ, Larama G, Cloutier S, Fofana B, Inostroza-Blancheteau C, Aravena G. The Genetic Dissection of Nitrogen Use-Related Traits in Flax ( Linum usitatissimum L.) at the Seedling Stage through the Integration of Multi-Locus GWAS, RNA-seq and Genomic Selection. Int J Mol Sci 2023; 24:17624. [PMID: 38139451 PMCID: PMC10743809 DOI: 10.3390/ijms242417624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Nitrogen (N), the most important macro-nutrient for plant growth and development, is a key factor that determines crop yield. Yet its excessive applications pollute the environment and are expensive. Hence, studying nitrogen use efficiency (NUE) in crops is fundamental for sustainable agriculture. Here, an association panel consisting of 123 flax accessions was evaluated for 21 NUE-related traits at the seedling stage under optimum N (N+) and N deficiency (N-) treatments to dissect the genetic architecture of NUE-related traits using a multi-omics approach integrating genome-wide association studies (GWAS), transcriptome analysis and genomic selection (GS). Root traits exhibited significant and positive correlations with NUE under N- conditions (r = 0.33 to 0.43, p < 0.05). A total of 359 QTLs were identified, accounting for 0.11% to 23.1% of the phenotypic variation in NUE-related traits. Transcriptomic analysis identified 1034 differentially expressed genes (DEGs) under contrasting N conditions. DEGs involved in N metabolism, root development, amino acid transport and catabolism and others, were found near the QTLs. GS models to predict NUE stress tolerance index (NUE_STI) trait were tested using a random genome-wide SNP dataset and a GWAS-derived QTLs dataset. The latter produced superior prediction accuracy (r = 0.62 to 0.79) compared to the genome-wide SNP marker dataset (r = 0.11) for NUE_STI. Our results provide insights into the QTL architecture of NUE-related traits, identify candidate genes for further studies, and propose genomic breeding tools to achieve superior NUE in flax under low N input.
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Affiliation(s)
- Braulio J. Soto-Cerda
- Departamento de Ciencias Agropecuarias y Acuícolas, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4781312, Chile; (C.I.-B.); (G.A.)
- Núcleo de Investigación en Producción Alimentaria, Facultad de Recursos Naturales, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4781312, Chile
| | - Giovanni Larama
- Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco 4811230, Chile;
- Biocontrol Research Laboratory, Universidad de La Frontera, Temuco 4811230, Chile
| | - Sylvie Cloutier
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada;
| | - Bourlaye Fofana
- Charlottetown Research and Development Centre, Agriculture and Agri-Food Canada, 440 University Avenue, Charlottetown, PE C1A 4N6, Canada
| | - Claudio Inostroza-Blancheteau
- Departamento de Ciencias Agropecuarias y Acuícolas, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4781312, Chile; (C.I.-B.); (G.A.)
- Núcleo de Investigación en Producción Alimentaria, Facultad de Recursos Naturales, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4781312, Chile
| | - Gabriela Aravena
- Departamento de Ciencias Agropecuarias y Acuícolas, Universidad Católica de Temuco, Rudecindo Ortega 02950, Temuco 4781312, Chile; (C.I.-B.); (G.A.)
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Weiszmann J, Walther D, Clauw P, Back G, Gunis J, Reichardt I, Koemeda S, Jez J, Nordborg M, Schwarzerova J, Pierides I, Nägele T, Weckwerth W. Metabolome plasticity in 241 Arabidopsis thaliana accessions reveals evolutionary cold adaptation processes. PLANT PHYSIOLOGY 2023; 193:980-1000. [PMID: 37220420 PMCID: PMC10517190 DOI: 10.1093/plphys/kiad298] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/25/2023]
Abstract
Acclimation and adaptation of metabolism to a changing environment are key processes for plant survival and reproductive success. In the present study, 241 natural accessions of Arabidopsis (Arabidopsis thaliana) were grown under two different temperature regimes, 16 °C and 6 °C, and growth parameters were recorded, together with metabolite profiles, to investigate the natural genome × environment effects on metabolome variation. The plasticity of metabolism, which was captured by metabolic distance measures, varied considerably between accessions. Both relative growth rates and metabolic distances were predictable by the underlying natural genetic variation of accessions. Applying machine learning methods, climatic variables of the original growth habitats were tested for their predictive power of natural metabolic variation among accessions. We found specifically habitat temperature during the first quarter of the year to be the best predictor of the plasticity of primary metabolism, indicating habitat temperature as the causal driver of evolutionary cold adaptation processes. Analyses of epigenome- and genome-wide associations revealed accession-specific differential DNA-methylation levels as potentially linked to the metabolome and identified FUMARASE2 as strongly associated with cold adaptation in Arabidopsis accessions. These findings were supported by calculations of the biochemical Jacobian matrix based on variance and covariance of metabolomics data, which revealed that growth under low temperatures most substantially affects the accession-specific plasticity of fumarate and sugar metabolism. Our findings indicate that the plasticity of metabolic regulation is predictable from the genome and epigenome and driven evolutionarily by Arabidopsis growth habitats.
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Affiliation(s)
- Jakob Weiszmann
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, 1030 Vienna, Austria
- Vienna Metabolomics Center (VIME), University of Vienna, 1030 Vienna, Austria
| | - Dirk Walther
- Bioinformatics, Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
| | - Pieter Clauw
- Austrian Academy of Sciences, Gregor Mendel Institute (GMI), 1030 Vienna, Austria
| | - Georg Back
- Bioinformatics, Max-Planck-Institute of Molecular Plant Physiology, 14476 Potsdam, Germany
| | - Joanna Gunis
- Austrian Academy of Sciences, Gregor Mendel Institute (GMI), 1030 Vienna, Austria
| | - Ilka Reichardt
- Genome Engineering Facility, Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Stefanie Koemeda
- Plant Sciences Facility, Vienna BioCenter Core Facilities GmbH (VBCF), 1030 Vienna, Austria
| | - Jakub Jez
- Plant Sciences Facility, Vienna BioCenter Core Facilities GmbH (VBCF), 1030 Vienna, Austria
| | - Magnus Nordborg
- Austrian Academy of Sciences, Gregor Mendel Institute (GMI), 1030 Vienna, Austria
| | - Jana Schwarzerova
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, 1030 Vienna, Austria
- Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Biomedical Engineering, Technická 12, 616 00 Brno, Czech Republic
| | - Iro Pierides
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, 1030 Vienna, Austria
| | - Thomas Nägele
- LMU Munich, Faculty of Biology, Plant Evolutionary Cell Biology, 82152 Planegg, Germany
| | - Wolfram Weckwerth
- Molecular Systems Biology (MOSYS), Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, University of Vienna, 1030 Vienna, Austria
- Vienna Metabolomics Center (VIME), University of Vienna, 1030 Vienna, Austria
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da Silva VCH, Martins MCM, Calderan-Rodrigues MJ, Artins A, Monte Bello CC, Gupta S, Sobreira TJP, Riaño-Pachón DM, Mafra V, Caldana C. Shedding Light on the Dynamic Role of the "Target of Rapamycin" Kinase in the Fast-Growing C 4 Species Setaria viridis, a Suitable Model for Biomass Crops. FRONTIERS IN PLANT SCIENCE 2021; 12:637508. [PMID: 33927734 PMCID: PMC8078139 DOI: 10.3389/fpls.2021.637508] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
The Target of Rapamycin (TOR) kinase pathway integrates energy and nutrient availability into metabolism promoting growth in eukaryotes. The overall higher efficiency on nutrient use translated into faster growth rates in C4 grass plants led to the investigation of differential transcriptional and metabolic responses to short-term chemical TOR complex (TORC) suppression in the model Setaria viridis. In addition to previously described responses to TORC inhibition (i.e., general growth arrest, translational repression, and primary metabolism reprogramming) in Arabidopsis thaliana (C3), the magnitude of changes was smaller in S. viridis, particularly regarding nutrient use efficiency and C allocation and partitioning that promote biosynthetic growth. Besides photosynthetic differences, S. viridis and A. thaliana present several specificities that classify them into distinct lineages, which also contribute to the observed alterations mediated by TOR. Indeed, cell wall metabolism seems to be distinctly regulated according to each cell wall type, as synthesis of non-pectic polysaccharides were affected in S. viridis, whilst assembly and structure in A. thaliana. Our results indicate that the metabolic network needed to achieve faster growth seems to be less stringently controlled by TORC in S. viridis.
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Affiliation(s)
| | | | | | - Anthony Artins
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | | | - Saurabh Gupta
- Institute of Biochemistry and Biology, University of Potsdam, Potsdam-Golm, Germany
| | | | | | - Valéria Mafra
- National Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Camila Caldana
- National Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
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Correa SM, Alseekh S, Atehortúa L, Brotman Y, Ríos-Estepa R, Fernie AR, Nikoloski Z. Model-assisted identification of metabolic engineering strategies for Jatropha curcas lipid pathways. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:76-95. [PMID: 33001507 DOI: 10.1111/tpj.14906] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 06/03/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
Efficient approaches to increase plant lipid production are necessary to meet current industrial demands for this important resource. While Jatropha curcas cell culture can be used for in vitro lipid production, scaling up the system for industrial applications requires an understanding of how growth conditions affect lipid metabolism and yield. Here we present a bottom-up metabolic reconstruction of J. curcas supported with labeling experiments and biomass characterization under three growth conditions. We show that the metabolic model can accurately predict growth and distribution of fluxes in cell cultures and use these findings to pinpoint energy expenditures that affect lipid biosynthesis and metabolism. In addition, by using constraint-based modeling approaches we identify network reactions whose joint manipulation optimizes lipid production. The proposed model and computational analyses provide a stepping stone for future rational optimization of other agronomically relevant traits in J. curcas.
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Affiliation(s)
- Sandra M Correa
- Genetics of Metabolic Traits Group, Max Planck Institute of Molecular Plant Physiology, Potsdam, 14476, Germany
- Grupo de Biotecnología, Departamento de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellín, 050010, Colombia
| | - Saleh Alseekh
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam, 14476, Germany
- Centre for Plant Systems Biology and Biotechnology, Plovdiv, 4000, Bulgaria
| | - Lucía Atehortúa
- Grupo de Biotecnología, Departamento de Ciencias Exactas y Naturales, Universidad de Antioquia, Medellín, 050010, Colombia
| | - Yariv Brotman
- Genetics of Metabolic Traits Group, Max Planck Institute of Molecular Plant Physiology, Potsdam, 14476, Germany
- Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Rigoberto Ríos-Estepa
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Universidad de Antioquia, Medellín, 050010, Colombia
| | - Alisdair R Fernie
- Central Metabolism Group, Max Planck Institute of Molecular Plant Physiology, Potsdam, 14476, Germany
- Centre for Plant Systems Biology and Biotechnology, Plovdiv, 4000, Bulgaria
| | - Zoran Nikoloski
- Centre for Plant Systems Biology and Biotechnology, Plovdiv, 4000, Bulgaria
- Bioinformatics, Institute of Biochemistry and Biology, University of Potsdam, Potsdam, 14476, Germany
- Systems Biology and Mathematical Modelling Group, Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, 14476, Germany
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5
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Characterization of In Vivo Function(s) of Members of the Plant Mitochondrial Carrier Family. Biomolecules 2020; 10:biom10091226. [PMID: 32846873 PMCID: PMC7565455 DOI: 10.3390/biom10091226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 02/06/2023] Open
Abstract
Although structurally related, mitochondrial carrier family (MCF) proteins catalyze the specific transport of a range of diverse substrates including nucleotides, amino acids, dicarboxylates, tricarboxylates, cofactors, vitamins, phosphate and H+. Despite their name, they do not, however, always localize to the mitochondria, with plasma membrane, peroxisomal, chloroplast and thylakoid and endoplasmic reticulum localizations also being reported. The existence of plastid-specific MCF proteins is suggestive that the evolution of these proteins occurred after the separation of the green lineage. That said, plant-specific MCF proteins are not all plastid-localized, with members also situated at the endoplasmic reticulum and plasma membrane. While by no means yet comprehensive, the in vivo function of a wide range of these transporters is carried out here, and we discuss the employment of genetic variants of the MCF as a means to provide insight into their in vivo function complementary to that obtained from studies following their reconstitution into liposomes.
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Fernie AR, Cavalcanti JHF, Nunes-Nesi A. Metabolic Roles of Plant Mitochondrial Carriers. Biomolecules 2020; 10:E1013. [PMID: 32650612 PMCID: PMC7408384 DOI: 10.3390/biom10071013] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/28/2020] [Accepted: 06/29/2020] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial carriers (MC) are a large family (MCF) of inner membrane transporters displaying diverse, yet often redundant, substrate specificities, as well as differing spatio-temporal patterns of expression; there are even increasing examples of non-mitochondrial subcellular localization. The number of these six trans-membrane domain proteins in sequenced plant genomes ranges from 39 to 141, rendering the size of plant families larger than that found in Saccharomyces cerevisiae and comparable with Homo sapiens. Indeed, comparison of plant MCs with those from these better characterized species has been highly informative. Here, we review the most recent comprehensive studies of plant MCFs, incorporating the torrent of genomic data emanating from next-generation sequencing techniques. As such we present a more current prediction of the substrate specificities of these carriers as well as review the continuing quest to biochemically characterize this feature of the carriers. Taken together, these data provide an important resource to guide direct genetic studies aimed at addressing the relevance of these vital carrier proteins.
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Affiliation(s)
- Alisdair R. Fernie
- Max-Planck-Instiute of Molecular Plant Physiology, 14476 Postdam-Golm, Germany
| | - João Henrique F. Cavalcanti
- Instituto de Educação, Agricultura e Ambiente, Universidade Federal do Amazonas, Humaitá 69800-000, Amazonas, Brazil;
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa 36570-900, Minas Gerais, Brazil
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7
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Mitochondrial Carriers for Aspartate, Glutamate and Other Amino Acids: A Review. Int J Mol Sci 2019; 20:ijms20184456. [PMID: 31510000 PMCID: PMC6769469 DOI: 10.3390/ijms20184456] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/05/2019] [Accepted: 09/06/2019] [Indexed: 12/19/2022] Open
Abstract
Members of the mitochondrial carrier (MC) protein family transport various molecules across the mitochondrial inner membrane to interlink steps of metabolic pathways and biochemical processes that take place in different compartments; i.e., are localized partly inside and outside the mitochondrial matrix. MC substrates consist of metabolites, inorganic anions (such as phosphate and sulfate), nucleotides, cofactors and amino acids. These compounds have been identified by in vitro transport assays based on the uptake of radioactively labeled substrates into liposomes reconstituted with recombinant purified MCs. By using this approach, 18 human, plant and yeast MCs for amino acids have been characterized and shown to transport aspartate, glutamate, ornithine, arginine, lysine, histidine, citrulline and glycine with varying substrate specificities, kinetics, influences of the pH gradient, and capacities for the antiport and uniport mode of transport. Aside from providing amino acids for mitochondrial translation, the transport reactions catalyzed by these MCs are crucial in energy, nitrogen, nucleotide and amino acid metabolism. In this review we dissect the transport properties, phylogeny, regulation and expression levels in different tissues of MCs for amino acids, and summarize the main structural aspects known until now about MCs. The effects of their disease-causing mutations and manipulation of their expression levels in cells are also considered as clues for understanding their physiological functions.
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Anwar A, She M, Wang K, Riaz B, Ye X. Biological Roles of Ornithine Aminotransferase (OAT) in Plant Stress Tolerance: Present Progress and Future Perspectives. Int J Mol Sci 2018; 19:ijms19113681. [PMID: 30469329 PMCID: PMC6274847 DOI: 10.3390/ijms19113681] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 02/06/2023] Open
Abstract
Plant tolerance to biotic and abiotic stresses is complicated by interactions between different stresses. Maintaining crop yield under abiotic stresses is the most daunting challenge for breeding resilient crop varieties. In response to environmental stresses, plants produce several metabolites, such as proline (Pro), polyamines (PAs), asparagine, serine, carbohydrates including glucose and fructose, and pools of antioxidant reactive oxygen species. Among these metabolites, Pro has long been known to accumulate in cells and to be closely related to drought, salt, and pathogen resistance. Pyrroline-5-carboxylate (P5C) is a common intermediate of Pro synthesis and metabolism that is produced by ornithine aminotransferase (OAT), an enzyme that functions in an alternative Pro metabolic pathway in the mitochondria under stress conditions. OAT is highly conserved and, to date, has been found in all prokaryotic and eukaryotic organisms. In addition, ornithine (Orn) and arginine (Arg) are both precursors of PAs, which confer plant resistance to drought and salt stresses. OAT is localized in the cytosol in prokaryotes and fungi, while OAT is localized in the mitochondria in higher plants. We have comprehensively reviewed the research on Orn, Arg, and Pro metabolism in plants, as all these compounds allow plants to tolerate different kinds of stresses.
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Affiliation(s)
- Alia Anwar
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Maoyun She
- School of Veterinary and Life Sciences, Murdoch University, WA 6150, Australia.
| | - Ke Wang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Bisma Riaz
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Xingguo Ye
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Ben Othman A, Ellouzi H, Planchais S, De Vos D, Faiyue B, Carol P, Abdelly C, Savouré A. Phospholipases Dζ1 and Dζ2 have distinct roles in growth and antioxidant systems in Arabidopsis thaliana responding to salt stress. PLANTA 2017; 246:721-735. [PMID: 28667438 DOI: 10.1007/s00425-017-2728-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 06/26/2017] [Indexed: 05/28/2023]
Abstract
Phospholipases Dζ play different roles in Arabidopsis salt tolerance affecting the regulation of ion transport and antioxidant responses. Lipid signalling mediated by phospholipase D (PLD) plays essential roles in plant growth including stress and hormonal responses. Here we show that PLDζ1 and PLDζ2 have distinct effects on Arabidopsis responses to salinity. A transcriptome analysis of a double pldζ1pldζ2 mutant revealed a cluster of genes involved in abiotic and biotic stresses, such as the high salt-stress responsive genes DDF1 and RD29A. Another cluster of genes with a common expression pattern included ROS detoxification genes involved in electron transport and biotic and abiotic stress responses. Total superoxide dismutase (SOD) activity was induced early in the shoots and roots of all pldζ mutants exposed to mild or severe salinity with the highest SOD activity measured in pldζ2 at 14 days. Lipid peroxidation in shoots and roots was higher in the pldζ1 mutant upon salt treatment and pldζ1 accumulated H2O2 earlier than other genotypes in response to salt. Salinity caused less deleterious effects on K+ accumulation in shoots and roots of the pldζ2 mutant than of wild type, causing only a slight variation in Na+/K+ ratio. Relative growth rates of wild-type plants, pldζ1, pldζ2 and pldζ1pldζ2 mutants were similar in control conditions, but strongly affected by salt in WT and pldζ1. The efficiency of photosystem II, estimated by measuring the ratio of chlorophyll fluorescence (F v/F m ratio), was strongly decreased in pldζ1 under salt stress. In conclusion, PLDζ2 plays a key role in determining Arabidopsis sensitivity to salt stress allowing ion transport and antioxidant responses to be finely regulated.
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Affiliation(s)
- Ahlem Ben Othman
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria (CBBC), BP 901, 2050, Hammam-Lif, Tunisia
| | - Hasna Ellouzi
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria (CBBC), BP 901, 2050, Hammam-Lif, Tunisia
| | - Séverine Planchais
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France
| | - Delphine De Vos
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France
- Institut Jean-Pierre Bourgin, UMR 1318, INRA-AgroParisTech, Centre INRA Versailles, 78026, Versailles Cedex, France
| | - Bualuang Faiyue
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France
- Department of Biology, Mahidol Wittayanusorn School, Salaya, Phuttamonthon, Nakhon Pathom, 73170, Thailand
| | - Pierre Carol
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France
| | - Chedly Abdelly
- Laboratoire des Plantes Extrêmophiles, Centre de Biotechnologie de Borj-Cedria (CBBC), BP 901, 2050, Hammam-Lif, Tunisia
| | - Arnould Savouré
- Sorbonne Universités, UPMC Univ Paris 06, iEES, UMR 7618 (UPMC, UPEC, CNRS, IRD, INRA, Paris Diderot), Case 237, 4 Place Jussieu, 75252, Paris Cedex 05, France.
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Zemanová V, Pavlík M, Pavlíková D. Cadmium toxicity induced contrasting patterns of concentrations of free sarcosine, specific amino acids and selected microelements in two Noccaea species. PLoS One 2017; 12:e0177963. [PMID: 28542385 PMCID: PMC5438182 DOI: 10.1371/journal.pone.0177963] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 05/05/2017] [Indexed: 12/24/2022] Open
Abstract
Cadmium (Cd) toxicity affects numerous metabolic processes in plants. In the presence of Cd, plants accumulate specific amino acids which may be beneficial to developing Cd tolerance. Our study aimed to characterize the changes in the metabolism of selected free amino acids that are associated with Cd tolerance, and investigate the levels of selected microelements in order to relate these changes to the adaptation strategies of two metallophytes-Noccaea caerulescens (Redlschlag, Austria) and Noccaea praecox (Mežica, Slovenia). The plants were exposed to Cd contamination (90 mg Cd/kg soil) for 120 days in a pot experiment. Our results showed higher Cd accumulation in N. praecox compared to N. caerulescens. Cadmium contamination reduced the zinc and nickel levels in both species and a mixed effect was determined for copper and manganese content. Differences in free amino acid metabolism were observed between the two metallophytes growing under Cd-free and Cd-loaded conditions. Under Cd-free conditions, aromatic amino acids (phenylalanine, tryptophan and tyrosine) and branched-chain amino acids (leucine, isoleucine and valine) were accumulated more in the leaves of N. praecox than in N. caerulescens. Cd stress increased the content of these amino acids in both species but this increase was significant only in N. caerulescens leaves. Marked differences in the responses of the two species to Cd stress were shown for alanine, phenylalanine, threonine and sarcosine. Cadmium contamination also induced an increase of threonine as alanine and sarcosine decrease, which was larger in N. caerulescens than in N. praecox. All these factors contribute to the higher adaptation of N. praecox to Cd stress.
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Affiliation(s)
- Veronika Zemanová
- Isotope Laboratory, Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Milan Pavlík
- Isotope Laboratory, Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Daniela Pavlíková
- Department of Agro-Environmental Chemistry and Plant Nutrition, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Prague, Czech Republic
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Chrobok D, Law SR, Brouwer B, Lindén P, Ziolkowska A, Liebsch D, Narsai R, Szal B, Moritz T, Rouhier N, Whelan J, Gardeström P, Keech O. Dissecting the Metabolic Role of Mitochondria during Developmental Leaf Senescence. PLANT PHYSIOLOGY 2016; 172:2132-2153. [PMID: 27744300 PMCID: PMC5129728 DOI: 10.1104/pp.16.01463] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/13/2016] [Indexed: 05/20/2023]
Abstract
The functions of mitochondria during leaf senescence, a type of programmed cell death aimed at the massive retrieval of nutrients from the senescing organ to the rest of the plant, remain elusive. Here, combining experimental and analytical approaches, we showed that mitochondrial integrity in Arabidopsis (Arabidopsis thaliana) is conserved until the latest stages of leaf senescence, while their number drops by 30%. Adenylate phosphorylation state assays and mitochondrial respiratory measurements indicated that the leaf energy status also is maintained during this time period. Furthermore, after establishing a curated list of genes coding for products targeted to mitochondria, we analyzed in isolation their transcript profiles, focusing on several key mitochondrial functions, such as the tricarboxylic acid cycle, mitochondrial electron transfer chain, iron-sulfur cluster biosynthesis, transporters, as well as catabolic pathways. In tandem with a metabolomic approach, our data indicated that mitochondrial metabolism was reorganized to support the selective catabolism of both amino acids and fatty acids. Such adjustments would ensure the replenishment of α-ketoglutarate and glutamate, which provide the carbon backbones for nitrogen remobilization. Glutamate, being the substrate of the strongly up-regulated cytosolic glutamine synthase, is likely to become a metabolically limiting factor in the latest stages of developmental leaf senescence. Finally, an evolutionary age analysis revealed that, while branched-chain amino acid and proline catabolism are very old mitochondrial functions particularly enriched at the latest stages of leaf senescence, auxin metabolism appears to be rather newly acquired. In summation, our work shows that, during developmental leaf senescence, mitochondria orchestrate catabolic processes by becoming increasingly central energy and metabolic hubs.
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Affiliation(s)
- Daria Chrobok
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Simon R Law
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Bastiaan Brouwer
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Pernilla Lindén
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Agnieszka Ziolkowska
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Daniela Liebsch
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Reena Narsai
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Bozena Szal
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Thomas Moritz
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Nicolas Rouhier
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - James Whelan
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Per Gardeström
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Olivier Keech
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.);
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.);
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.);
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
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12
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Monné M, Miniero DV, Daddabbo L, Palmieri L, Porcelli V, Palmieri F. Mitochondrial transporters for ornithine and related amino acids: a review. Amino Acids 2015; 47:1763-77. [PMID: 26002808 DOI: 10.1007/s00726-015-1990-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 04/15/2015] [Indexed: 12/18/2022]
Abstract
Among the members of the mitochondrial carrier family, there are transporters that catalyze the translocation of ornithine and related substrates, such as arginine, homoarginine, lysine, histidine, and citrulline, across the inner mitochondrial membrane. The mitochondrial carriers ORC1, ORC2, and SLC25A29 from Homo sapiens, BAC1 and BAC2 from Arabidopsis thaliana, and Ort1p from Saccharomyces cerevisiae have been biochemically characterized by transport assays in liposomes. All of them transport ornithine and amino acids with side chains terminating at least with one amine. There are, however, marked differences in their substrate specificities including their affinity for ornithine (KM values in the mM to μM range). These differences are most likely reflected by minor differences in the substrate binding sites of these carriers. The physiological role of the above-mentioned mitochondrial carriers is to link several metabolic pathways that take place partly in the cytosol and partly in the mitochondrial matrix and to provide basic amino acids for mitochondrial translation. In the liver, human ORC1 catalyzes the citrulline/ornithine exchange across the mitochondrial inner membrane, which is required for the urea cycle. Human ORC1, ORC2, and SLC25A29 are likely to be involved in the biosynthesis and transport of arginine, which can be used as a precursor for the synthesis of NO, agmatine, polyamines, creatine, glutamine, glutamate, and proline, as well as in the degradation of basic amino acids. BAC1 and BAC2 are implicated in some processes similar to those of their human counterparts and in nitrogen and amino acid metabolism linked to stress conditions and the development of plants. Ort1p is involved in the biosynthesis of arginine and polyamines in yeast.
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Affiliation(s)
- Magnus Monné
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Via E. Orabona 4, 70125, Bari, Italy
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13
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Winter G, Todd CD, Trovato M, Forlani G, Funck D. Physiological implications of arginine metabolism in plants. FRONTIERS IN PLANT SCIENCE 2015; 6:534. [PMID: 26284079 PMCID: PMC4520006 DOI: 10.3389/fpls.2015.00534] [Citation(s) in RCA: 280] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 06/29/2015] [Indexed: 05/18/2023]
Abstract
Nitrogen is a limiting resource for plant growth in most terrestrial habitats since large amounts of nitrogen are needed to synthesize nucleic acids and proteins. Among the 21 proteinogenic amino acids, arginine has the highest nitrogen to carbon ratio, which makes it especially suitable as a storage form of organic nitrogen. Synthesis in chloroplasts via ornithine is apparently the only operational pathway to provide arginine in plants, and the rate of arginine synthesis is tightly regulated by various feedback mechanisms in accordance with the overall nutritional status. While several steps of arginine biosynthesis still remain poorly characterized in plants, much wider attention has been paid to inter- and intracellular arginine transport as well as arginine-derived metabolites. A role of arginine as alternative source besides glutamate for proline biosynthesis is still discussed controversially and may be prevented by differential subcellular localization of enzymes. Apparently, arginine is a precursor for nitric oxide (NO), although the molecular mechanism of NO production from arginine remains unclear in higher plants. In contrast, conversion of arginine to polyamines is well documented, and in several plant species also ornithine can serve as a precursor for polyamines. Both NO and polyamines play crucial roles in regulating developmental processes as well as responses to biotic and abiotic stress. It is thus conceivable that arginine catabolism serves on the one hand to mobilize nitrogen storages, while on the other hand it may be used to fine-tune development and defense mechanisms against stress. This review summarizes the recent advances in our knowledge about arginine metabolism, with a special focus on the model plant Arabidopsis thaliana, and pinpoints still unresolved critical questions.
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Affiliation(s)
- Gudrun Winter
- Laboratory of Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Konstanz, Germany
| | | | - Maurizio Trovato
- Department of Biology and Biotechnology, Sapienza University of Rome, Rome, Italy
| | - Giuseppe Forlani
- Laboratory of Plant Physiology and Biochemistry, Department of Life Science and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Dietmar Funck
- Laboratory of Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Konstanz, Germany
- *Correspondence: Dietmar Funck, Laboratory of Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany,
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