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Ye K, Bu F, Zhong L, Dong Z, Ma Z, Tang Z, Zhang Y, Yang X, Xu X, Wang E, Lucas WJ, Huang S, Liu H, Zheng J. Mapping the molecular landscape of Lotus japonicus nodule organogenesis through spatiotemporal transcriptomics. Nat Commun 2024; 15:6387. [PMID: 39080318 PMCID: PMC11289483 DOI: 10.1038/s41467-024-50737-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 07/18/2024] [Indexed: 08/02/2024] Open
Abstract
Legumes acquire nitrogen-fixing ability by forming root nodules. Transferring this capability to more crops could reduce our reliance on nitrogen fertilizers, thereby decreasing environmental pollution and agricultural production costs. Nodule organogenesis is complex, and a comprehensive transcriptomic atlas is crucial for understanding the underlying molecular events. Here, we utilized spatial transcriptomics to investigate the development of nodules in the model legume, Lotus japonicus. Our investigation has identified the developmental trajectories of two critical regions within the nodule: the infection zone and peripheral tissues. We reveal the underlying biological processes and provide gene sets to achieve symbiosis and material exchange, two essential aspects of nodulation. Among the candidate regulatory genes, we illustrate that LjNLP3, a transcription factor belonging to the NIN-LIKE PROTEIN family, orchestrates the transition of nodules from the differentiation to maturation. In summary, our research advances our understanding of nodule organogenesis and provides valuable data for developing symbiotic nitrogen-fixing crops.
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Affiliation(s)
- Keyi Ye
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China.
| | - Fengjiao Bu
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
| | | | - Zhaonian Dong
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
| | - Zhaoxu Ma
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
- National Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research (Wuhan), College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
| | - Zhanpeng Tang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
| | - Yu Zhang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
- School of Agriculture, Sun Yat-sen University, Shenzhen, 518107, China
| | - Xueyong Yang
- State Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xun Xu
- State Key Laboratory of Agricultural Genomics, BGI Research, Shenzhen, 518083, China
| | - Ertao Wang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, SIBS, Chinese Academy of Sciences, Shanghai, China
| | - William J Lucas
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA, 95616, USA
| | - Sanwen Huang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China
- National Key Laboratory of Tropical Crop Breeding, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan, 571101, China
| | - Huan Liu
- BGI Research, Wuhan, 430074, China.
- State Key Laboratory of Agricultural Genomics, BGI Research, Shenzhen, 518083, China.
| | - Jianshu Zheng
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Genome Analysis Laboratory of the Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, Guangdong, 518120, China.
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2
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Arthikala MK, Montiel J, Sánchez-López R, Nava N, Cárdenas L, Quinto C. Respiratory Burst Oxidase Homolog Gene A Is Crucial for Rhizobium Infection and Nodule Maturation and Function in Common Bean. FRONTIERS IN PLANT SCIENCE 2017; 8:2003. [PMID: 29218056 PMCID: PMC5703732 DOI: 10.3389/fpls.2017.02003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 11/09/2017] [Indexed: 05/23/2023]
Abstract
Reactive oxygen species (ROS) produced by respiratory burst oxidase homologs (RBOHs) regulate numerous plant cell processes, including the symbiosis between legumes and nitrogen-fixing bacteria. Rapid and transient ROS production was reported after Phaseolus vulgaris root hairs were treated with Nod factors, indicating the presence of a ROS-associated molecular signature in the symbiosis signaling pathway. Rboh is a multigene family containing nine members (RbohA-I) in P. vulgaris. RNA interference of RbohB suppresses ROS production and attenuates rhizobial infection thread (IT) progression in P. vulgaris root hairs. However, the roles of other Rboh members in symbiotic interactions are largely unknown. In this study, we characterized the role of the NADPH oxidase-encoding gene RbohA (Phvulv091020621) in the P. vulgaris-Rhizobium tropici symbiosis. The spatiotemporal activity of the RbohA promoter colocalized with growing ITs and was associated with vascular bundles in developing nodules. Subcellular localization studies indicated that RBOHA was localized in the plasma membrane of P. vulgaris root hairs. After rhizobial inoculation, PvRBOHA was mainly distributed in the infection pocket and, to a lesser extent, throughout the IT. In PvRbohA RNAi lines, the rhizobial infection events were significantly reduced and, in successful infections, IT progression was arrested within the root hair, but did not impede cortical cell division. PvRbohA-RNAi nodules failed to fix nitrogen, since the infected cells in the few nodules formed were empty. RbohA-dependent ROS production and upregulation of several antioxidant enzymes was attenuated in rhizobia-inoculated PvRbohA-RNAi roots. These combined results indicate that PvRbohA is crucial for effective Rhizobium infection and its release into the nodule cells. This oxidase is partially or indirectly required to promote nodule organogenesis, altering the expression of auxin- and cyclin-related genes and genes involved in cell growth and division.
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Affiliation(s)
- Manoj-Kumar Arthikala
- Ciencias Agrogenómicas, Escuela Nacional de Estudios Superiores Unidad León, Universidad Nacional Autónoma de México, León, Mexico
| | - Jesús Montiel
- Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid, Madrid, Spain
| | - Rosana Sánchez-López
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Noreide Nava
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Luis Cárdenas
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Carmen Quinto
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
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Gaufichon L, Rothstein SJ, Suzuki A. Asparagine Metabolic Pathways in Arabidopsis. PLANT & CELL PHYSIOLOGY 2016; 57:675-89. [PMID: 26628609 DOI: 10.1093/pcp/pcv184] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 11/18/2015] [Indexed: 05/03/2023]
Abstract
Inorganic nitrogen in the form of ammonium is assimilated into asparagine via multiple steps involving glutamine synthetase (GS), glutamate synthase (GOGAT), aspartate aminotransferase (AspAT) and asparagine synthetase (AS) in Arabidopsis. The asparagine amide group is liberated by the reaction catalyzed by asparaginase (ASPG) and also the amino group of asparagine is released by asparagine aminotransferase (AsnAT) for use in the biosynthesis of amino acids. Asparagine plays a primary role in nitrogen recycling, storage and transport in developing and germinating seeds, as well as in vegetative and senescence organs. A small multigene family encodes isoenzymes of each step of asparagine metabolism in Arabidopsis, except for asparagine aminotransferase encoded by a single gene. The aim of this study is to highlight the structure of the genes and encoded enzyme proteins involved in asparagine metabolic pathways; the regulation and role of different isogenes; and kinetic and physiological properties of encoded enzymes in different tissues and developmental stages.
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Affiliation(s)
- Laure Gaufichon
- INRA, IJPB, UMR1318, ERL CNRS 3559, Saclay Plant Sciences, RD10, F-78026 Versailles, France
| | - Steven J Rothstein
- University of Guelph, Department of Molecular and Cellular Biology, Guelph, Ontario, Canada N1G 2W1
| | - Akira Suzuki
- INRA, IJPB, UMR1318, ERL CNRS 3559, Saclay Plant Sciences, RD10, F-78026 Versailles, France
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4
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O’Rourke JA, Iniguez LP, Fu F, Bucciarelli B, Miller SS, Jackson SA, McClean PE, Li J, Dai X, Zhao PX, Hernandez G, Vance CP. An RNA-Seq based gene expression atlas of the common bean. BMC Genomics 2014; 15:866. [PMID: 25283805 PMCID: PMC4195886 DOI: 10.1186/1471-2164-15-866] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 09/24/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Common bean (Phaseolus vulgaris) is grown throughout the world and comprises roughly 50% of the grain legumes consumed worldwide. Despite this, genetic resources for common beans have been lacking. Next generation sequencing, has facilitated our investigation of the gene expression profiles associated with biologically important traits in common bean. An increased understanding of gene expression in common bean will improve our understanding of gene expression patterns in other legume species. RESULTS Combining recently developed genomic resources for Phaseolus vulgaris, including predicted gene calls, with RNA-Seq technology, we measured the gene expression patterns from 24 samples collected from seven tissues at developmentally important stages and from three nitrogen treatments. Gene expression patterns throughout the plant were analyzed to better understand changes due to nodulation, seed development, and nitrogen utilization. We have identified 11,010 genes differentially expressed with a fold change ≥ 2 and a P-value < 0.05 between different tissues at the same time point, 15,752 genes differentially expressed within a tissue due to changes in development, and 2,315 genes expressed only in a single tissue. These analyses identified 2,970 genes with expression patterns that appear to be directly dependent on the source of available nitrogen. Finally, we have assembled this data in a publicly available database, The Phaseolus vulgaris Gene Expression Atlas (Pv GEA), http://plantgrn.noble.org/PvGEA/ . Using the website, researchers can query gene expression profiles of their gene of interest, search for genes expressed in different tissues, or download the dataset in a tabular form. CONCLUSIONS These data provide the basis for a gene expression atlas, which will facilitate functional genomic studies in common bean. Analysis of this dataset has identified genes important in regulating seed composition and has increased our understanding of nodulation and impact of the nitrogen source on assimilation and distribution throughout the plant.
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Affiliation(s)
- Jamie A O’Rourke
- />Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
- />USDA-ARS, Corn Insect Crop Genetics Research Unit, Iowa State University, Ames, IA 50011 USA
| | - Luis P Iniguez
- />Centro de Ciencias Genomicas, Universidad Nacional Autonoma de Mexico, 66210 Cuernavaca, Mor Mexico
| | - Fengli Fu
- />Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
| | - Bruna Bucciarelli
- />Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
- />USDA-Agricultural Research Service, Plant Science Research Unit, St. Paul, MN 55108 USA
| | - Susan S Miller
- />Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
- />USDA-Agricultural Research Service, Plant Science Research Unit, St. Paul, MN 55108 USA
| | - Scott A Jackson
- />Center for Applied Genetic Technologies, University of Georgia, Athens, GA 30602 USA
| | - Philip E McClean
- />Department of Plant Sciences, North Dakota State University, Fargo, ND 58105 USA
| | - Jun Li
- />Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK 73401 USA
| | - Xinbin Dai
- />Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK 73401 USA
| | - Patrick X Zhao
- />Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK 73401 USA
| | - Georgina Hernandez
- />Centro de Ciencias Genomicas, Universidad Nacional Autonoma de Mexico, 66210 Cuernavaca, Mor Mexico
| | - Carroll P Vance
- />Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
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5
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Arthikala MK, Sánchez-López R, Nava N, Santana O, Cárdenas L, Quinto C. RbohB, a Phaseolus vulgaris NADPH oxidase gene, enhances symbiosome number, bacteroid size, and nitrogen fixation in nodules and impairs mycorrhizal colonization. THE NEW PHYTOLOGIST 2014; 202:886-900. [PMID: 24571730 DOI: 10.1111/nph.12714] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 01/07/2014] [Indexed: 05/19/2023]
Abstract
The reactive oxygen species (ROS) generated by respiratory burst oxidative homologs (Rbohs) are involved in numerous plant cell signaling processes, and have critical roles in the symbiosis between legumes and nitrogen-fixing bacteria. Previously, down-regulation of RbohB in Phaseolus vulgaris was shown to suppress ROS production and abolish Rhizobium infection thread (IT) progression, but also to enhance arbuscular mycorrhizal fungal (AMF) colonization. Thus, Rbohs function both as positive and negative regulators. Here, we assessed the effect of enhancing ROS concentrations, by overexpressing PvRbohB, on the P. vulgaris--rhizobia and P. vulgaris--AMF symbioses. We estimated superoxide concentrations in hairy roots overexpressing PvRbohB, determined the status of early and late events of both Rhizobium and AMF interactions in symbiont-inoculated roots, and analyzed the nodule ultrastructure of transgenic plants overexpressing PvRbohB. Overexpression of PvRbohB significantly enhanced ROS production, the formation of ITs, nodule biomass, and nitrogen-fixing activity, and increased the density of symbiosomes in nodules, and the density and size of bacteroides in symbiosomes. Furthermore, PvCAT, early nodulin, PvSS1, and PvGOGAT transcript abundances were elevated in these nodules. By contrast, mycorrhizal colonization was reduced in roots that overexpressed RbohB. Overexpression of PvRbohB augmented nodule efficiency by enhancing nitrogen fixation and delaying nodule senescence, but impaired AMF colonization.
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MESH Headings
- Biomass
- Cloning, Molecular
- Colony Count, Microbial
- Down-Regulation/genetics
- Gene Expression Regulation, Plant
- Genes, Plant
- Models, Biological
- Mycorrhizae/growth & development
- NADPH Oxidases/genetics
- NADPH Oxidases/metabolism
- Nitrogen Fixation/genetics
- Phaseolus/enzymology
- Phaseolus/genetics
- Phaseolus/microbiology
- Phaseolus/ultrastructure
- Plant Proteins/metabolism
- Plants, Genetically Modified
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reactive Oxygen Species/metabolism
- Rhizobium/physiology
- Root Nodules, Plant/growth & development
- Root Nodules, Plant/microbiology
- Root Nodules, Plant/ultrastructure
- Symbiosis/genetics
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Affiliation(s)
- Manoj-Kumar Arthikala
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
| | - Rosana Sánchez-López
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
| | - Noreide Nava
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
| | - Olivia Santana
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
| | - Luis Cárdenas
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
| | - Carmen Quinto
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología, Universidad Nacional Autónoma de México, UNAM, Apartado Postal 510-3, Cuernavaca, Morelos, 62271, México
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Pérez-Tienda J, Corrêa A, Azcón-Aguilar C, Ferrol N. Transcriptional regulation of host NH₄⁺ transporters and GS/GOGAT pathway in arbuscular mycorrhizal rice roots. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2014; 75:1-8. [PMID: 24361504 DOI: 10.1016/j.plaphy.2013.11.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 11/29/2013] [Indexed: 05/21/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi play a key role in the nutrition of many land plants. AM roots have two pathways for nutrient uptake, directly through the root epidermis and root hairs and via AM fungal hyphae into root cortical cells, where arbuscules or hyphal coils provide symbiotic interfaces. Recent studies demonstrated that the AM symbiosis modifies the expression of plant transporter genes and that NH₄⁺ is the main form of N transported in the symbiosis. The aim of the present work was to get insights into the mycorrhizal N uptake pathway in Oryza sativa by analysing the expression of genes encoding ammonium transporters (AMTs), glutamine synthase (GS) and glutamate synthase (GOGAT) in roots colonized by the AM fungus Rhizophagus irregularis and grown under two N regimes. We found that the AM symbiosis down-regulated OsAMT1;1 and OsAMT1;3 expression at low-N, but not at high-N conditions, and induced, independently of the N status of the plant, a strong up-regulation of OsAMT3;1 expression. The AM-inducible NH₄⁺ transporter OsAMT3;1 belongs to the family 2 of plant AMTs and is phylogenetically related to the AM-inducible AMTs of other plant species. Moreover, for the first time we provide evidence of the specific induction of a GOGAT gene upon colonization with an AM fungus. These data suggest that OsAMT3;1 is likely involved in the mycorrhizal N uptake pathway in rice roots and that OsGOGAT2 plays a role in the assimilation of the NH₄⁺ supplied via the OsAMT3;1 AM-inducible transporter.
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Affiliation(s)
- Jacob Pérez-Tienda
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008 Granada, Spain
| | - Ana Corrêa
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008 Granada, Spain
| | - Concepción Azcón-Aguilar
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008 Granada, Spain
| | - Nuria Ferrol
- Departamento de Microbiología del Suelo y Sistemas Simbióticos, Estación Experimental del Zaidín, CSIC, C. Profesor Albareda 1, 18008 Granada, Spain.
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Wang M, Shen Q, Xu G, Guo S. New insight into the strategy for nitrogen metabolism in plant cells. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2014; 310:1-37. [PMID: 24725423 DOI: 10.1016/b978-0-12-800180-6.00001-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nitrogen (N) is one of the most important mineral nutrients required by higher plants. Primary N absorbed by higher plants includes nitrate (NO3(-)), ammonium (NH4(+)), and organic N. Plants have developed several mechanisms for regulating their N metabolism in response to N availability and environmental conditions. Numerous transporters have been characterized and the mode of N movement within plants has been demonstrated. For further assimilation of N, various enzymes are involved in the key processes of NO3(-) or NH4(+) assimilation. N and carbon (C) metabolism are tightly coordinated in the fundamental biochemical pathway that permits plant growth. As N and C metabolism are the fundamental constituents of plant life, understanding N regulation is essential for growing plants and improving crop production. Regulation of N metabolism at the transcriptional and posttranscriptional levels provides important perceptions in the complex regulatory network of plants to adapt to changing N availability. In this chapter, recent advances in elucidating molecular mechanisms of N metabolism processes and regulation strategy, as well as interactions between C and N, are discussed. This review provides new insights into the strategy for studying N metabolism at the cellular level for optimum plant growth in different environments.
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Affiliation(s)
- Min Wang
- Key Lab of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Agricultural Ministry, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, China; Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Qirong Shen
- Key Lab of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Agricultural Ministry, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, China; Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Guohua Xu
- Key Lab of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Agricultural Ministry, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, China; Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, Jiangsu Province, China
| | - Shiwei Guo
- Key Lab of Plant Nutrition and Fertilization in Low-Middle Reaches of the Yangtze River, Agricultural Ministry, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province, China; Jiangsu Key Lab and Engineering Center for Solid Organic Waste Utilization, Nanjing Agricultural University, Nanjing, Jiangsu Province, China.
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8
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Barraza A, Estrada-Navarrete G, Rodriguez-Alegria ME, Lopez-Munguia A, Merino E, Quinto C, Sanchez F. Down-regulation of PvTRE1 enhances nodule biomass and bacteroid number in the common bean. THE NEW PHYTOLOGIST 2013; 197:194-206. [PMID: 23121215 DOI: 10.1111/nph.12002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Accepted: 09/12/2012] [Indexed: 05/02/2023]
Abstract
Legume-rhizobium interactions have been widely studied and characterized, and the disaccharide trehalose has been commonly detected during this symbiotic interaction. It has been proposed that trehalose content in nodules during this symbiotic interaction might be regulated by trehalase. In the present study, we assessed the role of trehalose accumulation by down-regulating trehalase in the nodules of common bean plants. We performed gene expression analysis for trehalase (PvTRE1) during nodule development. PvTRE1 was knocked down by RNA interference (RNAi) in transgenic nodules of the common bean. PvTRE1 expression in nodulated roots is mainly restricted to nodules. Down-regulation of PvTRE1 led to increased trehalose content (78%) and bacteroid number (almost one order of magnitude). In addition, nodule biomass, nitrogenase activity, and GOGAT transcript accumulation were significantly enhanced too. The trehalose accumulation, triggered by PvTRE1 down-regulation, led to a positive impact on the legume-rhizobium symbiotic interaction. This could contribute to the agronomical enhancement of symbiotic nitrogen fixation.
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MESH Headings
- Agrobacterium/genetics
- Agrobacterium/metabolism
- Autophagy
- Bacterial Load
- Carbohydrate Metabolism
- Cloning, Molecular
- Escherichia coli/enzymology
- Escherichia coli/genetics
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Plant
- Gene Knockdown Techniques
- Genes, Plant
- Microbial Viability
- Nitrogen Fixation
- Nitrogenase/genetics
- Nitrogenase/metabolism
- Phaseolus/enzymology
- Phaseolus/genetics
- Phaseolus/microbiology
- Phylogeny
- Plant Leaves/enzymology
- Plant Leaves/genetics
- Plant Root Nodulation
- Plants, Genetically Modified/enzymology
- Plants, Genetically Modified/genetics
- Plants, Genetically Modified/microbiology
- Promoter Regions, Genetic
- RNA Interference
- Rhizobium etli/growth & development
- Rhizobium etli/isolation & purification
- Rhizobium etli/metabolism
- Root Nodules, Plant/enzymology
- Root Nodules, Plant/microbiology
- Symbiosis
- Transformation, Genetic
- Trehalase/genetics
- Trehalase/metabolism
- Trehalose/metabolism
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Affiliation(s)
- Aarón Barraza
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Georgina Estrada-Navarrete
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Maria Elena Rodriguez-Alegria
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Agustin Lopez-Munguia
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Enrique Merino
- Departamento de Microbiología Molecular, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Carmen Quinto
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
| | - Federico Sanchez
- Departamento de Biología Molecular de Plantas, Instituto de Biotecnología/Universidad Nacional Autónoma de México, Av. Universidad 2001, Cuernavaca, Morelos, 62210, México
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Suppression of glutamate synthase genes significantly affects carbon and nitrogen metabolism in rice (Oryza sativa L.). SCIENCE CHINA-LIFE SCIENCES 2011; 54:651-63. [PMID: 21748588 DOI: 10.1007/s11427-011-4191-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Accepted: 06/16/2011] [Indexed: 10/18/2022]
Abstract
Rice (Oryza sativa) glutamate synthase (GOGAT, EC 1.4.1.14) enzymes have been proposed to have great potential for improving nitrogen use efficiency, but their functions in vivo and their effects on carbon and nitrogen metabolism have not been systematically explored. In this research, we analyzed transcriptional profiles of rice GOGAT genes using a genome-wide microarray database, and investigated the effects of suppression of glutamate synthase genes on carbon and nitrogen metabolism using GOGAT co-suppressed rice plants. Transcriptional profiles showed that rice GOGAT genes were expressed differently in various tissues and organs, which suggested that they have different roles in vivo. Compared with the wild-type, tiller number, total shoot dry weight, and yield of GOGAT co-suppressed plants were significantly decreased. Physiological and biochemical studies showed that the contents of nitrate, several kinds of free amino acids, chlorophyll, sugars, sugar phosphates, and pyridine nucleotides were significantly decreased in leaves of GOGAT co-suppressed plants, but the contents of free ammonium, 2-oxoglutarate, and isocitrate in leaves were increased. We conclude that GOGATs play essential roles in carbon and nitrogen metabolism, and that they are indispensable for efficient nitrogen assimilation in rice.
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