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de Souza Moreira FM, Cabral Michel D, Marques Cardoso R. The elite strain INPA03-11B approved as a cowpea inoculant in Brazil represents a new Bradyrhizobium species and it has high adaptability to stressful soil conditions. Braz J Microbiol 2024; 55:1853-1862. [PMID: 38393616 PMCID: PMC11153402 DOI: 10.1007/s42770-024-01280-7] [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: 07/28/2023] [Accepted: 02/04/2024] [Indexed: 02/25/2024] Open
Abstract
The strain INPA03-11BT, isolated in the 1980s from nodules of Centrosema sp. collected in Manaus, Amazonas, Brazil, was approved by the Brazilian Ministry of Agriculture as a cowpea inoculant in 2004. Since then, several studies have been conducted regarding its phenotypic, genetic, and symbiotic characteristics under axenic and field conditions. Phenotypic features demonstrate its high adaptability to stressful soil conditions, such as tolerance to acidity, high temperatures, and 13 antibiotics, and, especially, its high symbiotic efficiency with cowpea and soybean, proven in the field. The nodC and nifH phylogenies placed the INPA strain in the same clade as the species B. macuxiense BR 10303T which was also isolated from the Amazon region. The sequencing of the 16S rRNA ribosomal gene and housekeeping genes, as well as BOX-PCR profiles, showed its potential as a new species, which was confirmed by a similarity percentage of 94.7% and 92.6% in Average Nucleotide Identity with the closest phylogenetically related species Bradyrhizobium tropiciagri CNPSo1112T and B. viridifuturi SEMIA690T, respectively. dDDH values between INPA03-11BT and both CNPSo 1112T and SEMIA690T were respectively 58.5% and 48.1%, which are much lower than the limit for species boundary (70%). Therefore, we propose the name Bradyrhizobium amazonense for INPA03-11BT (= BR3301 = SEMIA6463).
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Affiliation(s)
- Fatima Maria de Souza Moreira
- Setor de Biologia, Microbiologia e Processos Biológicos do Solo, Universidade Federal de Lavras, Lavras, MG, CEP 37200-900, Brazil.
| | - Daniele Cabral Michel
- Setor de Biologia, Microbiologia e Processos Biológicos do Solo, Universidade Federal de Lavras, Lavras, MG, CEP 37200-900, Brazil
| | - Raysa Marques Cardoso
- Setor de Biologia, Microbiologia e Processos Biológicos do Solo, Universidade Federal de Lavras, Lavras, MG, CEP 37200-900, Brazil
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2
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Amenta ML, Vaccaro F, Varriale S, Sangaré JR, Defez R, Mengoni A, Bianco C. Cereals can trap endophytic bacteria with potential beneficial traits when grown ex-situ in harsh soils. FEMS Microbiol Ecol 2024; 100:fiae041. [PMID: 38544316 PMCID: PMC11009874 DOI: 10.1093/femsec/fiae041] [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: 08/18/2023] [Revised: 03/01/2024] [Accepted: 03/26/2024] [Indexed: 04/13/2024] Open
Abstract
Microbial communities associated with plants growing in harsh conditions, including salinity and water deficiency, have developed adaptive features which permit them to grow and survive under extreme environmental conditions. In the present study, an ex-situ plant trapping method has been applied to collect the culturable microbial diversity associated with the soil from harsh and remote areas. Oryza sativa cv. Baldo and Triticum durum Primadur plants were used as recruiters, while the soil surrounding the roots of Oryza glaberrima plants from remote regions of Mali (West Africa) was used as substrate for their growth. The endophytic communities recruited by the two plant species belonged to Proteobacteria and Firmicutes, and the dominant genera were Bacillus, Kosakonia, and Enterobacter. These endophytes were characterized by analyzing some of the most common plant growth promoting traits. Halotolerant, inorganic phosphate-solubilizing and N-fixing strains were found, and some of them simultaneously showing these three traits. We verified that 'Baldo' recruited mostly halotolerant and P-solubilizers endophytes, while the endophytes selected by 'Primadur' were mainly N-fixers. The applied ex-situ plant trapping method allowed to isolate endophytes with potential beneficial traits that could be applied for the improvement of rice and wheat growth under adverse environmental conditions.
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Affiliation(s)
- Maria Laura Amenta
- National Research Council, Institute of Biosciences and BioResources, via P. Castellino 111, 80131 Naples, Italy
| | - Francesca Vaccaro
- Department of Biology, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Stefano Varriale
- National Research Council,
Institute of Biosciences and BioResources, via P. Castellino 111, 80131 Naples, Italy
| | - Jean Rodrigue Sangaré
- Institut d'Economie Rurale (IER), Centre Régional de Recherche Agronomique (CRRA) de Sikasso, B.P: 16, Mali
| | - Roberto Defez
- National Research Council, Institute of Biosciences and BioResources, via P. Castellino 111, 80131 Naples, Italy
| | - Alessio Mengoni
- Department of Biology, University of Florence, 50019 Sesto Fiorentino, Italy
| | - Carmen Bianco
- National Research Council, Institute of Biosciences and BioResources, via P. Castellino 111, 80131 Naples, Italy
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3
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Diversity and Efficiency of Rhizobia from a Revegetated Area and Hotspot-Phytophysiognomies Affected by Iron Mining as Indicators of Rehabilitation and Biotechnological Potential. Curr Microbiol 2023; 80:40. [DOI: 10.1007/s00284-022-03104-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 10/29/2022] [Indexed: 12/23/2022]
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Zhong C, Chen C, Gao X, Tan C, Bai H, Ning K. Multi-omics profiling reveals comprehensive microbe-plant-metabolite regulation patterns for medicinal plant Glycyrrhiza uralensis Fisch. PLANT BIOTECHNOLOGY JOURNAL 2022; 20:1874-1887. [PMID: 35668676 PMCID: PMC9491449 DOI: 10.1111/pbi.13868] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 04/04/2022] [Accepted: 06/02/2022] [Indexed: 05/16/2023]
Abstract
Glycyrrhiza uralensis Fisch is a medicinal plant widely used to treat multiple diseases in Europe and Asia, and its efficacy largely depends on liquiritin and glycyrrhizic acid. The regulatory pattern responsible for the difference in efficacy between wild and cultivated G. uralensis remains largely undetermined. Here, we collected roots and rhizosphere soils from wild (WT) G. uralensis as well as those farmed for 1 year (C1) and 3 years (C3), generated metabolite and transcript data for roots, microbiota data for rhizospheres and conducted comprehensive multi-omics analyses. We updated gene structures for all 40 091 genes in G. uralensis, and based on 52 differentially expressed genes, we charted the route-map of both liquiritin and glycyrrhizic acid biosynthesis, with genes BAS, CYP72A154 and CYP88D6 critical for glycyrrhizic acid biosynthesis being significantly expressed higher in wild G. uralensis than in cultivated G. uralensis. Additionally, multi-omics network analysis identified that Lysobacter was strongly associated with CYP72A154, which was required for glycyrrhizic acid biosynthesis. Finally, we developed a holistic multi-omics regulation model that confirmed the importance of rhizosphere microbial community structure in liquiritin accumulation. This study thoroughly decoded the key regulatory mechanisms of liquiritin and glycyrrhizic acid, and provided new insights into the interactions of the plant's key metabolites with its transcriptome, rhizosphere microbes and environment, which would guide future cultivation of G. uralensis.
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Affiliation(s)
- Chaofang Zhong
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
- Key Laboratory of Karst Biodiversity and Ecological Security, College of Environmental and Life SciencesNanning Normal UniversityNanningChina
| | - Chaoyun Chen
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
| | - Xi Gao
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
| | - Chongyang Tan
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
| | - Hong Bai
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
| | - Kang Ning
- Key Laboratory of Molecular Biophysics of the Ministry of Education, Hubei Key Laboratory of Bioinformatics and Molecular‐imaging, Center of AI Biology, Department of Bioinformatics and Systems Biology, College of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina
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Roychoudhury T, Ray B, Seal A. Metabolically dependent consortia in biofilm: A new horizon for green agriculture. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2021.102256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Rodríguez-Rodríguez RM, Guimarães AA, de Castro JL, Siqueira JO, Carneiro MAC, de Souza Moreira FM. Rhizobia and endophytic bacteria isolated from rainforest fragments within an iron ore mining site of the Eastern Brazilian Amazon. Braz J Microbiol 2021; 52:1461-1474. [PMID: 34142357 PMCID: PMC8324639 DOI: 10.1007/s42770-021-00524-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 05/08/2021] [Indexed: 11/29/2022] Open
Abstract
The aim of the present study was to isolate and evaluate the diversity of rhizobial and endophytic bacterial strains from undisturbed native rainforests within an iron ore mining site of the Serra Norte de Carajás in the Eastern Brazilian Amazon region to assess their biotechnological utility in reclamation of areas. Experiments were conducted to capture strains from samples of the soil of these forests at the sites Arenito II, Noroeste II, and Sul IV using Macroptilium atropurpureum and Mimosa acutistipula var. ferrea as trap host plants. Only M. atropurpureum nodulated, and the different bacterial strains were isolated from its nodules. There was no difference in the number of nodules among the areas, but the Arenito II bacterial community was the most efficient, indicated by the aboveground biomass production and suitable shoot mass/root mass ratio. Fifty-two (52) bacterial isolates were obtained, distributed in five groups, including nodulating and endophytic bacteria: 32 from Arenito II, 12 from Noroeste II, and 8 from Sul IV. The nodulating Bradyrhizobium genus was common to the three areas, whereas Paraburkholderia was found only in Arenito II. The nodD1 gene was amplified in all the strains of both nodulating genera. Strains of the nodulating genus Methylobacterium were also isolated from the three areas; however, they did not nodulate the host of origin, and their nodD1 gene was not amplified. Endophytic strains were also isolated from the genera Paenibacillus, Pantoea, and Leifsonia in Arenito II, Leifsonia in Noroeste I, and Paenibacillus in Sul IV. The greater nodulation and rhizobial and endophytic bacterial diversity observed in Arenito II were probably due to the more suitable edaphic properties of the area. The isolated strains were incorporated in the collection of the Department of Soil Science of UFLA and will be investigated in relation to their symbiotic characteristics with native host plants, as well as their ability to perform other biological processes.
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Affiliation(s)
- Raquel Milagros Rodríguez-Rodríguez
- Departamento de Biofertilizantes Y Nutrición de Las Plantas, Instituto Nacional de Ciencias Agrícolas (INCA), San José de Las Lajas, Mayabeque, Cuba
- Departamento de Ciência Do Solo, Universidade Federal de Lavras (DCS-UFLA), Lavras, MG, Brazil
| | | | - Jordana Luísa de Castro
- Departamento de Ciência Do Solo, Universidade Federal de Lavras (DCS-UFLA), Lavras, MG, Brazil
| | - José Oswaldo Siqueira
- Departamento de Ciência Do Solo, Universidade Federal de Lavras (DCS-UFLA), Lavras, MG, Brazil
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Wang C, Qin Y, Li Y, Wu R, Zhu D, Zhou F, Xu F. Variations of root-associated bacterial cooccurrence relationships in paddy soils under chlorantraniliprole (CAP) stress. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 779:146247. [PMID: 33743468 DOI: 10.1016/j.scitotenv.2021.146247] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/21/2021] [Accepted: 02/27/2021] [Indexed: 06/12/2023]
Abstract
Root-associated microbiomes are beneficial for plant development and health. However, the assembly of root-associated bacterial communities and their feedback under chlorantraniliprole (CAP) stress are unclear. This study investigated the response of root-associated bacterial microbiota to CAP dosage during the two developmental phases of rice. The results showed that CAP application had little effect on the bacterial diversity of bulk and rhizosphere soils, whereas that of the endosphere samples demonstrated a large variability. Moreover, the CAP stress exhibited less influence than the plant compartment and developmental stage contributing to microbiome variation. The core bacterial co-occurrence relationships also changed with the CAP application, especially, in the endosphere of the roots. These results further elucidate the impacts of CAP application on root-associated bacterial communities in intensive agricultural ecosystems and provide new insights for CAP ecological risk assessments.
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Affiliation(s)
- Chaonan Wang
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Yifan Qin
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Yilong Li
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Ruilin Wu
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Dongqiang Zhu
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Feng Zhou
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China
| | - Fuliu Xu
- MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
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8
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Paulitsch F, Dos Reis FB, Hungria M. Twenty years of paradigm-breaking studies of taxonomy and symbiotic nitrogen fixation by beta-rhizobia, and indication of Brazil as a hotspot of Paraburkholderia diversity. Arch Microbiol 2021; 203:4785-4803. [PMID: 34245357 DOI: 10.1007/s00203-021-02466-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/11/2021] [Accepted: 06/25/2021] [Indexed: 10/20/2022]
Abstract
Twenty years ago, the first members of the genus Burkholderia capable of nodulating and fixing N2 during symbiosis with leguminous plants were reported. The discovery that β-proteobacteria could nodulate legumes represented a breakthrough event because, for over 100 years, it was thought that all rhizobia belonged exclusively to the α-Proteobacteria class. Over the past 20 years, efforts toward robust characterization of these bacteria with large-scale phylogenomic and taxonomic studies have led to the separation of clinically important and phytopathogenic members of Burkholderia from environmental ones, and the symbiotic nodulating species are now included in the genera Paraburkholderia and Trinickia. Paraburkholderia encompasses the vast majority of β-rhizobia and has been mostly found in South America and South Africa, presenting greater symbiotic affinity with native members of the families Mimosoideae and Papilionoideae, respectively. Being the main center of Mimosa spp. diversity, Brazil is also known as the center of symbiotic Paraburkholderia diversity. Of the 21 symbiotic Paraburkholderia species described to date, 11 have been isolated in Brazil, and others first isolated in different countries have also been found in this country. Additionally, besides the symbiotic N2-fixation capacity of some of its members, Paraburkholderia is considered rich in other beneficial interactions with plants and can promote growth through several direct and indirect mechanisms. Therefore, these bacteria can be considered biological resources employed as environmentally friendly alternatives that could reduce the agricultural dependence on agrochemical inputs.
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Affiliation(s)
- Fabiane Paulitsch
- Embrapa Soja, C.P. 231, Londrina, Paraná, 86001-970, Brazil.,Departamento de Microbiologia, Universidade Estadual de Londrina, C.P. 10011, Londrina, Paraná, 86057-970, Brazil.,Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, SBN, Quadra 2, Bloco L, Lote 06, Edifício Capes, Brasília, Distrito Federal, 70040-020, Brazil
| | | | - Mariangela Hungria
- Embrapa Soja, C.P. 231, Londrina, Paraná, 86001-970, Brazil. .,Departamento de Microbiologia, Universidade Estadual de Londrina, C.P. 10011, Londrina, Paraná, 86057-970, Brazil.
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Hu D, Baskin JM, Baskin CC, Liu R, Yang X, Huang Z. A Seed Mucilage-Degrading Fungus From the Rhizosphere Strengthens the Plant-Soil-Microbe Continuum and Potentially Regulates Root Nutrients of a Cold Desert Shrub. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:538-546. [PMID: 33596107 DOI: 10.1094/mpmi-01-21-0014-fi] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Seed mucilage plays important roles in the adaptation of desert plants to the stressful environment. Artemisia sphaerocephala is an important pioneer plant in the Central Asian cold desert, and it produces a large quantity of seed mucilage. Seed mucilage of A. sphaerocephala can be degraded by soil microbes, but it is unknown which microorganisms can degrade mucilage or how the mucilage-degrading microorganisms affect rhizosphere microbial communities or root nutrients. Here, mucilage-degrading microorganisms were isolated from the rhizosphere of A. sphaerocephala, were screened by incubation with mucilage stained with Congo red, and were identified by sequencing and phylogenetic analyses. Fungal-bacterial networks based on high-throughput sequencing of rhizosphere microbes were constructed to explore the seasonal dynamic of interactions between a mucilage-degrading microorganism and its closely related microorganisms. The structural equation model was used to analyze effects of the mucilage-degrading microorganism, rhizosphere fungal-bacterial communities, and soil physicochemical properties on root C and N. The fungus Phanerochaete chrysosporium was identified as a mucilage-degrading microorganism. Relative abundance of the mucilage-degrading fungus (MDF) was highest in May. Subnetworks showed that the abundance of fungi and bacteria closely related to the MDF also were highest in May. Interactions between the MDF and related fungi and bacteria were positive, which might enhance mucilage degradation. In addition, the MDF might regulate root C and N by affecting rhizosphere microbial community structure. Our results suggest that MDF from the rhizosphere strengthens the plant-soil-microbe continuum, thereby potentially regulating microbial interactions and root nutrients of A. sphaerocephala.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Dandan Hu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
| | - Jerry M Baskin
- Department of Biology, University of Kentucky, Lexington, KY 40506, U.S.A
| | - Carol C Baskin
- Department of Biology, University of Kentucky, Lexington, KY 40506, U.S.A
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546, U.S.A
| | - Rong Liu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xuejun Yang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Zhenying Huang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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Priya P, Aneesh B, Harikrishnan K. Genomics as a potential tool to unravel the rhizosphere microbiome interactions on plant health. J Microbiol Methods 2021; 185:106215. [PMID: 33839214 DOI: 10.1016/j.mimet.2021.106215] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 04/05/2021] [Accepted: 04/06/2021] [Indexed: 12/12/2022]
Abstract
Intense agricultural practices to meet rising food demands have caused ecosystem perturbations. For sustainable crop production, biological agents are gaining attention, but exploring their functional potential on a multi-layered complex ecosystem like the rhizosphere is challenging. This review explains the significance of genomics as a culture-independent molecular tool to understand the diversity and functional significance of the rhizosphere microbiome for sustainable agriculture. It discusses the recent significant studies in the rhizosphere environment carried out using evolving techniques like metagenomics, metatranscriptomics, and metaproteomics, their challenges, constraints infield application, and prospective solutions. The recent advances in techniques such as nanotechnology for the development of bioformulations and visualization techniques contemplating environmental safety were also discussed. The need for development of metagenomic data sets of regionally important crops, their plant microbial interactions and agricultural practices for narrowing down significant data from huge databases have been suggested. The role of taxonomical and functional diversity of soil microbiota in understanding soil suppression and part played by the microbial metabolites in the process have been analyzed and discussed in the context of 'omics' approach. 'Omics' studies have revealed important information about microbial diversity, their responses to various biotic and abiotic stimuli, and the physiology of disease suppression. This can be translated to crop sustainability and combinational approaches with advancing visualization and analysis methodologies fix the existing knowledge gap to a huge extend. With improved data processing and standardization of the methods, details of plant-microbe interactions can be successfully decoded to develop sustainable agricultural practices.
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Affiliation(s)
- P Priya
- Environmental Biology Lab, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India.
| | - B Aneesh
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences Cochin University of Science and Technology, Cochin, Kerala, India.
| | - K Harikrishnan
- Environmental Biology Lab, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India.
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Martins da Costa E, de Lima W, de Almeida Ribeiro PR, de Souza Moreira FM. Acid and high-temperature tolerant Bradyrhizobium spp. strains from Brazilian soils are able to promote Acacia mangium and Stizolobium aterrimum growth. Symbiosis 2020. [DOI: 10.1007/s13199-020-00732-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Farias GC, Nunes KG, Soares MA, de Siqueira KA, Lima WC, Neves ALR, de Lacerda CF, Filho EG. Dark septate endophytic fungi mitigate the effects of salt stress on cowpea plants. Braz J Microbiol 2020; 51:243-253. [PMID: 31656023 PMCID: PMC7058810 DOI: 10.1007/s42770-019-00173-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 10/03/2019] [Indexed: 02/07/2023] Open
Abstract
The association of plant with microorganisms, such as dark septate endophytic fungi, has mitigated the harmful effects of chemical, physical, and biological agents on the host. The objective of this work was to evaluate the interaction of the dark septate endophytic fungi with cowpea plants under salt stress. Endophytic fungi were isolated from Vochysia divergens root system, and molecular identification of fungi was performed by sequencing the ITS region. We selected and identified Sordariomycetes sp1-B'2 and Melanconiella elegans-21W2 for their ability to infect V. divergens root in vitro with development of typical dark septate fungi structures. Cowpea plants-inoculated or not inoculated with Sordariomycetes sp1-B'2 and M. elegans 21W2-were cultivated in 5-L pots under greenhouse conditions and submitted to four different electrical conductivities of irrigation water (1.2, 2.2, 3.6, and 5.0 dS m-1). The salinity caused decrease in leaf concentration of K and increased leaf concentration of calcium, sodium, and chlorine; and no influence of dark septate endophytic fungi was observed in these responses. On the other hand, root colonization with Sordariomycetes sp1-B'2 and M. elegans 21W2 resulted in improved nutrition with N and P in cowpea under salt stress, favoring the growth and rate of liquid photosynthesis. However, such positive responses were evident only at moderate levels of salinity.
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Affiliation(s)
- Gabriel Castro Farias
- Laboratory Soil-Water-Plant Relations, Department of Agricultural Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Kenya Gonçalves Nunes
- Laboratory Soil-Water-Plant Relations, Department of Agricultural Engineering, Federal University of Ceará, Fortaleza, Brazil.
| | - Marcos Antônio Soares
- Laboratory of Biotechnology and Microbial Ecology, Department of Botany and Ecology, Institute of Biosciences, Federal University of Mato Grosso, Cuiabá, Brazil
| | - Kátia Aparecida de Siqueira
- Laboratory of Biotechnology and Microbial Ecology, Department of Botany and Ecology, Institute of Biosciences, Federal University of Mato Grosso, Cuiabá, Brazil
| | - William Cardoso Lima
- Federal Institute of Education, Science and Technology of Mato Grosso, Cuiabá, Brazil
| | - Antônia Leila Rocha Neves
- Laboratory Soil-Water-Plant Relations, Department of Agricultural Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Claudivan Feitosa de Lacerda
- Laboratory Soil-Water-Plant Relations, Department of Agricultural Engineering, Federal University of Ceará, Fortaleza, Brazil
| | - Enéas Gomes Filho
- Laboratory of Plant Physiology, Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Brazil
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Favero VO, Carvalho RH, Motta VM, Leite ABC, Coelho MRR, Xavier GR, Rumjanek NG, Urquiaga S. Bradyrhizobium as the Only Rhizobial Inhabitant of Mung Bean ( Vigna radiata) Nodules in Tropical Soils: A Strategy Based on Microbiome for Improving Biological Nitrogen Fixation Using Bio-Products. FRONTIERS IN PLANT SCIENCE 2020; 11:602645. [PMID: 33510747 PMCID: PMC7835340 DOI: 10.3389/fpls.2020.602645] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/14/2020] [Indexed: 05/07/2023]
Abstract
The mung bean has a great potential under tropical conditions given its high content of grain protein. Additionally, its ability to benefit from biological nitrogen fixation (BNF) through association with native rhizobia inhabiting nodule microbiome provides most of the nitrogen independence on fertilizers. Soil microbial communities which are influenced by biogeographical factors and soil properties, represent a source of rhizobacteria capable of stimulating plant growth. The objective of this study is to support selection of beneficial bacteria that form positive interactions with mung bean plants cultivated in tropical soils, as part of a seed inoculation program for increasing grain yield based on the BNF and other mechanisms. Two mung bean genotypes (Camaleão and Esmeralda) were cultivated in 10 soil samples. Nodule microbiome was characterized by next-generation sequencing using Illumina MiSeq 16S rRNA. More than 99% of nodule sequences showed similarity with Bradyrhizobium genus, the only rhizobial present in nodules in our study. Higher bacterial diversity of soil samples collected in agribusiness areas (MW_MT-I, II or III) was associated with Esmeralda genotype, while an organic agroecosystem soil sample (SE_RJ-V) showed the highest bacterial diversity independent of genotype. Furthermore, OTUs close to Bradyrhizobium elkanii have dominated in all soil samples, except in the sample from the organic agroecosystem, where just B. japonicum was present. Bacterial community of mung bean nodules is mainly influenced by soil pH, K, Ca, and P. Besides a difference on nodule colonization by OTU sequences close to the Pseudomonas genus regarding the two genotypes was detected too. Although representing a small rate, around 0.1% of the total, Pseudomonas OTUs were only retrieved from nodules of Esmeralda genotype, suggesting a different trait regarding specificity between macro- and micro-symbionts. The microbiome analysis will guide the next steps in the development of an inoculant for mung bean aiming to promote plant growth and grain yield, composed either by an efficient Bradyrhizobium strain on its own or co-inoculated with a Pseudomonas strain. Considering the results achieved, the assessment of microbial ecology parameters is a potent coadjuvant capable to accelerate the inoculant development process and to improve the benefits to the crop by soil microorganisms.
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Affiliation(s)
| | | | | | | | | | | | - Norma Gouvêa Rumjanek
- Embrapa Agrobiology, Seropédica, Rio de Janeiro, Brazil
- *Correspondence: Norma Gouvêa Rumjanek,
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Artigas Ramírez MD, España M, Lewandowska S, Yuan K, Okazaki S, Ohkama-Ohtsu N, Yokoyama T. Phylogenetic Analysis of Symbiotic Bacteria Associated with Two Vigna Species under Different Agro-Ecological Conditions in Venezuela. Microbes Environ 2020; 35:ME19120. [PMID: 31932537 PMCID: PMC7104274 DOI: 10.1264/jsme2.me19120] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 11/10/2019] [Indexed: 12/26/2022] Open
Abstract
Vigna is a genus of legumes cultivated in specific areas of tropical countries. Species in this genus are important crops worldwide. Vigna species are of great agronomic interest in Venezuela because Vigna beans are an excellent alternative to other legumes. However, this type of crop has some cultivation issues due to sensitivity to acidic soils, high temperatures, and salinity stress, which are common in Venezuela. Vigna species establish symbioses mainly with Bradyrhizobium and Ensifer, and Vigna-rhizobia interactions have been examined in Asia, Africa, and America. However, the identities of the rhizobia associated with V. radiata and V. unguiculata in Venezuela remain unknown. In the present study, we isolated Venezuelan symbiotic rhizobia associated with Vigna species from soils with contrasting agroecosystems or from fields in Venezuela. Several types of soils were used for bacterial isolation and nodules were sampled from environments characterized by abiotic stressors, such as high temperatures, high concentrations of NaCl, and acidic or alkaline pH. Venezuelan Vigna-rhizobia were mainly fast-growing. Sequencing of several housekeeping genes showed that in contrast to other continents, Venezuelan Vigna species were nodulated by rhizobia genus including Burkholderia, containing bacteria from several new phylogenetic lineages within the genus Bradyrhizobium. Some Rhizobium and Bradyrhizobium isolates were tolerant of high salinity and Al toxicity. The stress tolerance of strains was dependent on the type of rhizobia, soil origin, and cultivation history. An isolate classified as R. phaseoli showed the highest plant biomass, nitrogen fixation, and excellent abiotic stress response, suggesting a novel promising inoculant for Vigna cultivation in Venezuela.
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Affiliation(s)
- María Daniela Artigas Ramírez
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
| | | | - Sylwia Lewandowska
- Department of Genetics, Plant Breeding and Seed Production, Wrocław University of Environmental and Life Sciences, 50–363 Wrocław, 24A, Grunwaldzki—Poland
| | - Kun Yuan
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
| | - Shin Okazaki
- United Graduated School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3–5–8, Fuchu, Tokyo—Japan
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Xia F, Zhou X, Liu Y, Li Y, Bai X, Zhou X. Composition and predictive functional analysis of bacterial communities inhabiting Chinese Cordyceps insight into conserved core microbiome. BMC Microbiol 2019; 19:105. [PMID: 31122191 PMCID: PMC6533680 DOI: 10.1186/s12866-019-1472-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 05/02/2019] [Indexed: 12/04/2022] Open
Abstract
Background Over the past few decades, most attention to Chinese Cordyceps-associated endogenous microorganism was focused on the fungal community that creates critical bioactive components. Bacterial community associated with Chinese Cordyceps has been previously described; however, most studies were only presenting direct comparisons in the Chinese Cordyceps and its microenvironments. In the current study, our objectives were to reveal the bacterial community structure composition and predict their function. Results We collected samples of Chinese Cordyceps from five sites located in the Qinghai-Tibet Plateau and used a high throughput sequencing method to compare Chinese Cordyceps-associated bacterial community composition and diversity quantitatively across sites. The results indicated that for the Chinese Cordyceps-associated bacterial community there is no single core microbiome, which was dominated by the both Proteobacteria and Actinobacteria. Predictive functional profiling suggested a location specific function pattern for Chinese Cordyceps and bacteria in the external mycelial cortices involved in the biosynthesis of active constituents. Conclusions This study is firstly used high throughput sequencing method to compare the bacterial communities inhabiting Chinese Cordyceps and its microhabitat and to reveal composition functional capabilities of the bacteria, which will accelerate the study of the functions of bacterial communities in the micro-ecological system of Chinese Cordyceps. Electronic supplementary material The online version of this article (10.1186/s12866-019-1472-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Fei Xia
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and State Key Laboratory of Microbial Metabolism, and School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.,School of Food and Biological Engineering, ShaanXi University of Science & Technology, Xi' An, 710061, China
| | - Xin Zhou
- Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Yan Liu
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and State Key Laboratory of Microbial Metabolism, and School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China
| | - Yuling Li
- Grassland Research Institute, Qinghai Academy of Animal Sciences and Veterinary Medicine, Xining, Qinghai province, 810016, People's Republic of China
| | - Xiaohui Bai
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and State Key Laboratory of Microbial Metabolism, and School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
| | - Xuanwei Zhou
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and State Key Laboratory of Microbial Metabolism, and School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China.
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Mohanram S, Kumar P. Rhizosphere microbiome: revisiting the synergy of plant-microbe interactions. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01448-9] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Jaiswal SK, Dakora FD. Widespread Distribution of Highly Adapted Bradyrhizobium Species Nodulating Diverse Legumes in Africa. Front Microbiol 2019; 10:310. [PMID: 30853952 PMCID: PMC6395442 DOI: 10.3389/fmicb.2019.00310] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 02/05/2019] [Indexed: 11/17/2022] Open
Abstract
Bradyrhizobium is one of the most cosmopolitan and diverse bacterial group nodulating a variety of host legumes in Africa, however, the diversity and distribution of bradyrhizobial symbionts nodulating indigenous African legumes are not well understood, though needed for increased food legume production. In this review, we have shown that many African food legumes are nodulated by bradyrhizobia, with greater diversity in Southern Africa compared to other parts of Africa. From a few studies done in Africa, the known bradyrhizobia (i.e., Bradyrhizobium elkanii, B. yuanmingense) along with many novel Bradyrhizobium species are the most dominant in African soils. This could be attributed to the unique edapho-climatic conditions of the contrasting environments in the continent. More studies are needed to identify the many novel bradyrhizobia resident in African soils in order to better understand the biogeography of bradyrhizobia and their potential for inoculant production.
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Affiliation(s)
- Sanjay K. Jaiswal
- Department of Chemistry, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
| | - Felix D. Dakora
- Department of Chemistry, Faculty of Science, Tshwane University of Technology, Pretoria, South Africa
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Martins da Costa E, Soares de Carvalho T, Azarias Guimarães A, Ribas Leão AC, Magalhães Cruz L, de Baura VA, Lebbe L, Willems A, de Souza Moreira FM. Classification of the inoculant strain of cowpea UFLA03-84 and of other strains from soils of the Amazon region as Bradyrhizobium viridifuturi (symbiovar tropici). Braz J Microbiol 2019; 50:335-345. [PMID: 30759310 DOI: 10.1007/s42770-019-00045-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/20/2018] [Indexed: 12/20/2022] Open
Abstract
Cowpea (Vigna unguiculata L.) is a legume species that considerably benefits from inoculation with nitrogen fixing bacteria of the genus Bradyrhizobium. One of the strains recommended for inoculation in cowpea in Brazil is UFLA03-84 (Bradyrhizobium sp.). The aim of our study was to define the taxonomic position of the UFLA03-84 strain and of two other strains of Bradyrhizobium (UFLA03-144 and INPA237B), all belonging to the same phylogenetic group and isolated from soils of the Brazilian Amazon. Multilocus sequence analysis (MLSA) of the housekeeping genes atpD, gyrB, recA, and rpoB grouped (with similarity higher than 99%) the three strains with Bradyrhizobium viridifuturi SEMIA 690T. The analyses of average nucleotide identity and digital DNA-DNA hybridization supported classification of the group as Bradyrhizobium viridifuturi. The three strains exhibited similar behavior in relation to the most of the phenotypic characteristics evaluated. However, some characteristics exhibited variation, indicating phenotypic diversity within the species. Phylogenetic analysis of the nodC and nifH genes showed that the three strains are members of the same symbiovar (tropici) that contains type strains of Bradyrhizobium species coming from tropical soils (SEMIA 690TB. viridifuturi, CNPSo 1112TB. tropiciagri, CNPSo 2833TB. embrapense, and B. brasilense UFLA03-321T).
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Affiliation(s)
- Elaine Martins da Costa
- Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras, MG, 37200-000, Brazil.,Universidade Federal do Piauí, Campus Professora Cinobelina Elvas, Bom Jesus, Piauí, 64900-000, Brazil
| | | | | | - Aniele Carolina Ribas Leão
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, 81531990, Brazil
| | - Leonardo Magalhães Cruz
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, 81531990, Brazil
| | - Valter Antonio de Baura
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, Paraná, 81531990, Brazil
| | - Liesbeth Lebbe
- Department of Biochemistry and Microbiology, Ghent University, B-9000, Ghent, Belgium
| | - Anne Willems
- Department of Biochemistry and Microbiology, Ghent University, B-9000, Ghent, Belgium
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De Meyer SE, Ruthrof KX, Edwards T, Hopkins AJ, Hardy G, O’Hara G, Howieson J. Diversity of endemic rhizobia on Christmas Island: Implications for agriculture following phosphate mining. Syst Appl Microbiol 2018; 41:641-649. [DOI: 10.1016/j.syapm.2018.07.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 07/31/2018] [Accepted: 07/31/2018] [Indexed: 11/26/2022]
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20
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Ndungu SM, Messmer MM, Ziegler D, Gamper HA, Mészáros É, Thuita M, Vanlauwe B, Frossard E, Thonar C. Cowpea ( Vigna unguiculata L. Walp) hosts several widespread bradyrhizobial root nodule symbionts across contrasting agro-ecological production areas in Kenya. AGRICULTURE, ECOSYSTEMS & ENVIRONMENT 2018; 261:161-171. [PMID: 29970945 PMCID: PMC5946706 DOI: 10.1016/j.agee.2017.12.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 09/18/2017] [Accepted: 12/15/2017] [Indexed: 06/08/2023]
Abstract
Cowpea (Vigna unguiculata L. Walp.) is an important African food legume suitable for dry regions. It is the main legume in two contrasting agro-ecological regions of Kenya as an important component of crop rotations because of its relative tolerance to unpredictable drought events. This study was carried out in an effort to establish a collection of bacterial root nodule symbionts and determine their relationship to physicochemical soil parameters as well as any geographical distributional patterns. Bradyrhizobium spp. were found to be widespread in this study and several different types could be identified at each site. Unique but rare symbionts were recovered from the nodules of plants sampled in a drier in-land region, where there were also overall more different bradyrhizobia found. Plants raised in soil from uncultivated sites with a natural vegetation cover tended to also associate with more different bradyrizobia. The occurrence and abundance of different bradyrhizobia correlated with differences in soil texture and pH, but did neither with the agro-ecological origin, nor the origin from cultivated (n = 15) or uncultivated (n = 5) sites. The analytical method, protein profiling of isolated strains by Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS), provided higher resolution than 16S rRNA gene sequencing and was applied in this study for the first time to isolates recovered directly from field-collected cowpea root nodules. The method thus seems suitable for screening isolate collections on the presence of different groups, which, provided an appropriate reference database, can also be assigned to known species.
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Affiliation(s)
- Samuel Mathu Ndungu
- Institute of Agricultural Sciences, ETH Zurich Plant Nutrition group Eschikon 33, CH-8315 Lindau, Switzerland
- International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100 Nairobi, Kenya
- Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070 Frick, Switzerland
| | - Monika M. Messmer
- Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070 Frick, Switzerland
| | - Dominik Ziegler
- Mabritec AG, Lörracherstrasse 50, CH-4125 Riehen, Switzerland
| | - Hannes A. Gamper
- Institute of Agricultural Sciences, ETH Zurich Plant Nutrition group Eschikon 33, CH-8315 Lindau, Switzerland
| | - Éva Mészáros
- Institute of Agricultural Sciences, ETH Zurich Plant Nutrition group Eschikon 33, CH-8315 Lindau, Switzerland
| | - Moses Thuita
- International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100 Nairobi, Kenya
| | - Bernard Vanlauwe
- International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100 Nairobi, Kenya
| | - Emmanuel Frossard
- Institute of Agricultural Sciences, ETH Zurich Plant Nutrition group Eschikon 33, CH-8315 Lindau, Switzerland
| | - Cécile Thonar
- Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070 Frick, Switzerland
- Current address: AgroBioChem Department, Gembloux Agro-Bio Tech, University of Liège, B-5030 Gembloux, Belgium
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Ndungu SM, Messmer MM, Ziegler D, Thuita M, Vanlauwe B, Frossard E, Thonar C. Evaluation of MALDI-TOF mass spectrometry for the competitiveness analysis of selected indigenous cowpea (Vigna unguiculata L. Walp.) Bradyrhizobium strains from Kenya. Appl Microbiol Biotechnol 2018; 102:5265-5278. [PMID: 29696334 DOI: 10.1007/s00253-018-9005-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/03/2018] [Accepted: 04/05/2018] [Indexed: 01/21/2023]
Abstract
Cowpea N2 fixation and yield can be enhanced by selecting competitive and efficient indigenous rhizobia. Strains from contrasting agro-ecologies of Kilifi and Mbeere (Kenya) were screened. Two pot experiments were established consisting of 13 Bradyrhizobium strains; experiment 1 (11 Mbeere + CBA + BK1 from Burkina Faso), experiment 2 (12 Kilifi + CBA). Symbiotic effectiveness was assessed (shoot biomass, SPAD index and N uptake). Nodule occupancy of 13 simultaneously co-inoculated strains in each experiment was analyzed by matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS) to assess competitiveness. Strains varied in effectiveness and competitiveness. The four most efficient strains were further evaluated in a field trial in Mbeere during the 2014 short rains. Strains from bacteroids of cowpea nodules from pot and field experiments were accurately identified as Bradyrhizobium by MALDI-TOF based on the SARAMIS™ database. In the field, abundant indigenous populations 7.10 × 103 rhizobia g-1 soil, outcompeted introduced strains. As revealed by MALDI-TOF, indigenous strains clustered into six distinct groups (I, II, III, IV, V and VI), group III were most abundant occupying 80% of nodules analyzed. MALDI-TOF was rapid, affordable and reliable to identify Bradyrhizobium strains directly from nodule suspensions in competition pot assays and in the field with abundant indigenous strains thus, its suitability for future competition assays. Evaluating strain competitiveness and then symbiotic efficacy is proposed in bioprospecting for potential cowpea inoculant strains.
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Affiliation(s)
- Samuel Mathu Ndungu
- Institute of Agricultural Sciences, ETH Zurich, Plant Nutrition group, Eschikon 33, CH-8315, Lindau, Switzerland. .,Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070, Frick, Switzerland. .,International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100, Nairobi, Kenya.
| | - Monika M Messmer
- Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070, Frick, Switzerland
| | - Dominik Ziegler
- Mabritec AG, Lörracherstrasse 50, CH-4125, Riehen, Switzerland
| | - Moses Thuita
- International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100, Nairobi, Kenya
| | - Bernard Vanlauwe
- International Institute of Tropical Agriculture (IITA), c/o ICIPE Campus, P.O. Box 30772-00100, Nairobi, Kenya
| | - Emmanuel Frossard
- Institute of Agricultural Sciences, ETH Zurich, Plant Nutrition group, Eschikon 33, CH-8315, Lindau, Switzerland
| | - Cécile Thonar
- Research Institute of Organic Agriculture (FiBL), Ackerstrasse 113, CH-5070, Frick, Switzerland. .,AgroBioChem Department, Gembloux Agro-Bio Tech, University of Liège, B-5030, Gembloux, Belgium.
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Bradyrhizobium forestalis sp. nov., an efficient nitrogen-fixing bacterium isolated from nodules of forest legume species in the Amazon. Arch Microbiol 2018; 200:743-752. [DOI: 10.1007/s00203-018-1486-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/22/2018] [Accepted: 01/24/2018] [Indexed: 01/01/2023]
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Distribution and Phylogeny of Microsymbionts Associated with Cowpea (Vigna unguiculata) Nodulation in Three Agroecological Regions of Mozambique. Appl Environ Microbiol 2018; 84:AEM.01712-17. [PMID: 29101189 PMCID: PMC5752868 DOI: 10.1128/aem.01712-17] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 10/19/2017] [Indexed: 11/22/2022] Open
Abstract
Cowpea derives most of its N nutrition from biological nitrogen fixation (BNF) via symbiotic bacteroids in root nodules. In Sub-Saharan Africa, the diversity and biogeographic distribution of bacterial microsymbionts nodulating cowpea and other indigenous legumes are not well understood, though needed for increased legume production. The aim of this study was to describe the distribution and phylogenies of rhizobia at different agroecological regions of Mozambique using PCR of the BOX element (BOX-PCR), restriction fragment length polymorphism of the internal transcribed spacer (ITS-RFLP), and sequence analysis of ribosomal, symbiotic, and housekeeping genes. A total of 122 microsymbionts isolated from two cowpea varieties (IT-1263 and IT-18) grouped into 17 clades within the BOX-PCR dendrogram. The PCR-ITS analysis yielded 17 ITS types for the bacterial isolates, while ITS-RFLP analysis placed all test isolates in six distinct clusters (I to VI). BLASTn sequence analysis of 16S rRNA and four housekeeping genes (glnII, gyrB, recA, and rpoB) showed their alignment with Rhizobium and Bradyrhizobium species. The results revealed a group of highly diverse and adapted cowpea-nodulating microsymbionts which included Bradyrhizobium pachyrhizi, Bradyrhizobium arachidis, Bradyrhizobium yuanmingense, and a novel Bradyrhizobium sp., as well as Rhizobium tropici, Rhizobium pusense, and Neorhizobium galegae in Mozambican soils. Discordances observed in single-gene phylogenies could be attributed to horizontal gene transfer and/or subsequent recombinations of the genes. Natural deletion of 60 bp of the gyrB region was observed in isolate TUTVU7; however, this deletion effect on DNA gyrase function still needs to be confirmed. The inconsistency of nifH with core gene phylogenies suggested differences in the evolutionary history of both chromosomal and symbiotic genes. IMPORTANCE A diverse group of both Bradyrhizobium and Rhizobium species responsible for cowpea nodulation in Mozambique was found in this study. Future studies could prove useful in evaluating these bacterial isolates for symbiotic efficiency and strain competitiveness in Mozambican soils.
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Hussain SS, Mehnaz S, Siddique KHM. Harnessing the Plant Microbiome for Improved Abiotic Stress Tolerance. PLANT MICROBIOME: STRESS RESPONSE 2018. [DOI: 10.1007/978-981-10-5514-0_2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Morphological and Genetic Diversity of Rhizobia Nodulating Cowpea ( Vigna unguiculata L.) from Agricultural Soils of Lower Eastern Kenya. Int J Microbiol 2017; 2017:8684921. [PMID: 29463983 PMCID: PMC5804113 DOI: 10.1155/2017/8684921] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/31/2017] [Accepted: 12/11/2017] [Indexed: 11/18/2022] Open
Abstract
Limited nitrogen (N) content in the soil is a major challenge to sustainable and high crop production in many developing countries. The nitrogen fixing symbiosis of legumes with rhizobia plays an important role in supplying sufficient N for legumes and subsequent nonleguminous crops. To identify rhizobia strains which are suitable for bioinoculant production, characterization of rhizobia is a prerequisite. The objective of this study was to assess the morphological and genetic diversity of rhizobia that nodulates cowpea in agricultural soils of lower eastern Kenya. Twenty-eight rhizobia isolates were recovered from soil samples collected from farmers' fields in Machakos, Makueni, and Kitui counties in lower eastern Kenya and characterized based on morphological characteristics. Thirteen representative isolates were selected and characterized using BOX repetitive element PCR fingerprinting. Based on the dendrogram generated from morphological characteristics, the test isolates were distributed into two major clusters at a similarity of 75%. Phylogenetic tree, based on BOX repetitive element PCR, grouped the isolates into two clusters at 90% similarity level. The clustering of the isolates did not show a relationship to the origin of soil samples, although the isolates were genetically diverse. This study is a prerequisite to the selection of suitable cowpea rhizobia to develop bioinoculants for sustainable crop production in Kenya.
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Tampakaki AP, Fotiadis CT, Ntatsi G, Savvas D. A novel symbiovar (aegeanense) of the genus Ensifer nodulates Vigna unguiculata. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:4314-4325. [PMID: 28220509 DOI: 10.1002/jsfa.8281] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 02/10/2017] [Accepted: 02/16/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Cowpea (Vigna unguiculata) forms nitrogen-fixing root nodules with diverse symbiotic bacteria, mainly slow-growing rhizobial species belonging to the genus Bradyrhizobium, although a few studies have reported the isolation of fast-growing rhizobia under laboratory and field conditions. Although much research has been done on cowpea-nodulating bacteria in various countries around the world, very limited information is available on cowpea rhizobia in European soils. The aim of this study was to study the genetic and phenotypic diversity of indigenous cowpea-nodulating rhizobia in Greece. RESULTS The genetic diversity of indigenous rhizobia associated with cowpea was investigated through a polyphasic approach. ERIC-PCR based fingerprinting analysis grouped the isolates into three groups. Based on the analysis of the 16S rRNA genes, IGS and on the concatenation of six housekeeping genes (recA, glnII, gyrB, truA, thrA and SMc00019), rhizobial isolates were classified within the species Ensifer fredii. However, symbiotic gene phylogenies, based on nodC, nifH and rhcRST genes, showed that the Ensifer isolates are markedly diverged from type and reference strains of E. fredii and formed one clearly separate cluster. The E. fredii strains were able to nodulate and fix nitrogen in cowpea but not in soybean and common bean. CONCLUSION The present study showed that cowpea is nodulated under field conditions by fast-growing rhizobia belonging to the species E. fredii. Based on the phylogenies, similarity levels of symbiotic genes and the host range, the Ensifer isolates may constitute a new symbiovar for which the name 'aegeanense' is proposed. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Anastasia P Tampakaki
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Christos T Fotiadis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Georgia Ntatsi
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Dimitrios Savvas
- Laboratory of Vegetable Production, Department of Crop Science, Agricultural University of Athens, Athens, Greece
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Egamberdieva D, Wirth SJ, Shurigin VV, Hashem A, Abd Allah EF. Endophytic Bacteria Improve Plant Growth, Symbiotic Performance of Chickpea ( Cicer arietinum L.) and Induce Suppression of Root Rot Caused by Fusarium solani under Salt Stress. Front Microbiol 2017; 8:1887. [PMID: 29033922 PMCID: PMC5625113 DOI: 10.3389/fmicb.2017.01887] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Accepted: 09/14/2017] [Indexed: 11/25/2022] Open
Abstract
Salinity causes disturbance in symbiotic performance of plants, and increases susceptibility of plants to soil-borne pathogens. Endophytic bacteria are an essential determinant of cross-tolerance to biotic and abiotic stresses in plants. The aim of this study was to isolate non–rhizobial endophytic bacteria from the root nodules of chickpea (Cicer arietinum L.), and to assess their ability to improve plant growth and symbiotic performance, and to control root rot in chickpea under saline soil conditions. A total of 40 bacterial isolates from internal root tissues of chickpea grown in salinated soil were isolated. Four bacterial isolates, namely Bacillus cereus NUU1, Achromobacter xylosoxidans NUU2, Bacillus thuringiensis NUU3, and Bacillus subtilis NUU4 colonizing root tissue demonstrated plant beneficial traits and/or antagonistic activity against F. solani and thus were characterized in more detail. The strain B. subtilis NUU4 proved significant plant growth promotion capabilities, improved symbiotic performance of host plant with rhizobia, and promoted yield under saline soil as compared to untreated control plants under field conditions. A combined inoculation of chickpea with M. ciceri IC53 and B. subtilis NUU4 decreased H2O2 concentrations and increased proline contents compared to the un-inoculated plants indicating an alleviation of adverse effects of salt stress. Furthermore, the bacterial isolate was capable to reduce the infection rate of root rot in chickpea caused by F. solani. This is the first report of F. solani causing root rot of chickpea in a salinated soil of Uzbekistan. Our findings demonstrated that the endophytic B. subtilis strain NUU4 provides high potentials as a stimulator for plant growth and as biological control agent of chickpea root rot under saline soil conditions. These multiple relationships could provide promising practical approaches to increase the productivity of legumes under salt stress.
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Affiliation(s)
- Dilfuza Egamberdieva
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape Biogeochemistry, Müncheberg, Germany.,Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Stephan J Wirth
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape Biogeochemistry, Müncheberg, Germany
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.,Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, Giza, Egypt
| | - Elsayed F Abd Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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Toma MA, Soares de Carvalho T, Azarias Guimarães A, Martins da Costa E, Savana da Silva J, de Souza Moreira FM. Tripartite symbiosis of Sophora tomentosa, rhizobia and arbuscular mycorhizal fungi. Braz J Microbiol 2017; 48:680-688. [PMID: 28756029 PMCID: PMC5628302 DOI: 10.1016/j.bjm.2017.03.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 02/28/2017] [Accepted: 03/17/2017] [Indexed: 11/24/2022] Open
Abstract
Sophora tomentosa is a pantropical legume species with potential for recovery of areas degraded by salinization, and for stabilization of sand dunes. However, few studies on this species have been carried out, and none regarding its symbiotic relationship with beneficial soil microorganisms. Therefore, this study aimed to evaluate the diversity of nitrogen-fixing bacteria isolated from nodules of Sophora tomentosa, and to analyze the occurrence of colonization of arbuscular mycorrhizal fungi on the roots of this legume in seafront soil. Thus, seeds, root nodules, and soil from the rhizosphere of Sophora tomentosa were collected. From the soil samples, trap cultures with this species were established to extract spores and to evaluate arbuscular mycorhizal fungi colonization in legume roots, as well as to capture rhizobia. Rhizobia strains were isolated from nodules collected in the field or from the trap cultures. Representative isolates of the groups obtained in the similarity dendrogram, based on phenotypic characteristics, had their 16S rRNA genes sequenced. The legume species showed nodules with indeterminate growth, and reddish color, distributed throughout the root. Fifty-one strains of these nodules were isolated, of which 21 were classified in the genus Bacillus, Brevibacillus, Paenibacillus, Rhizobium and especially Sinorhizobium. Strains closely related to Sinorhizobium adhaerens were the predominant bacteria in nodules. The other genera found, with the exception of Rhizobium, are probably endophytic bacteria in the nodules. Arbuscular mycorrhizal fungi was observed colonizing the roots, but arbuscular mycorhizal fungi spores were not found in the trap cultures. Therefore Sophora tomentosa is associated with both arbuscular mycorhizal fungi and nodulating nitrogen-fixing bacteria.
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Affiliation(s)
- Maíra Akemi Toma
- Universidade Federal de Lavras (UFLA), Departamento de Ciência do Solo (DCS), Lavras, MG, Brazil
| | | | - Amanda Azarias Guimarães
- Universidade Federal de Lavras (UFLA), Departamento de Ciência do Solo (DCS), Lavras, MG, Brazil
| | - Elaine Martins da Costa
- Universidade Federal de Mato Grosso do Sul (UFMS) - Campus de Chapadão do Sul, Chapadão do Sul, MS, Brazil
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Toniutti MA, Fornasero LV, Albicoro FJ, Martini MC, Draghi W, Alvarez F, Lagares A, Pensiero JF, Del Papa MF. Nitrogen-fixing rhizobial strains isolated from Desmodium incanum DC in Argentina: Phylogeny, biodiversity and symbiotic ability. Syst Appl Microbiol 2017. [PMID: 28648724 DOI: 10.1016/j.syapm.2017.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Desmodium spp. are leguminous plants belonging to the tribe Desmodieae of the subfamily Papilionoideae. They are widely distributed in temperated and subtropical regions and are used as forage plants, for biological control, and in traditional folk medicine. The genus includes pioneer species that resist the xerothermic environment and grow in arid, barren sites. Desmodium species that form nitrogen-fixing symbiosis with rhizobia play an important role in sustainable agriculture. In Argentina, 23 native species of this genus have been found, including Desmodium incanum. In this study, a total of 64 D. incanum-nodulating rhizobia were obtained from root nodules of four Argentinean plant populations. Rhizobia showed different abiotic-stress tolerances and a remarkable genetic diversity using PCR fingerprinting, with more than 30 different amplification profiles. None of the isolates were found at more than one site, thus indicating a high level of rhizobial diversity associated with D. incanum in Argentinean soils. In selected isolates, 16S rDNA sequencing and whole-cell extract MALDI TOF analysis revealed the presence of isolates related to Bradyrhizobium elkanii, Bradyrhizobium japonicum, Bradyrhizobium yuanmingense, Bradyrhizobium liaoningense, Bradyrhizobium denitrificans and Rhizobium tropici species. In addition, the nodC gene studied in the selected isolates showed different allelic variants. Isolates were phenotypically characterized by assaying their growth under different abiotic stresses. Some of the local isolates were remarkably tolerant to high temperatures, extreme pH and salinity, which are all stressors commonly found in Argentinean soils. One of the isolates showed high tolerance to temperature and extreme pH, and produced higher aerial plant dry weights compared to other inoculated treatments. These results indicated that local isolates could be efficiently used for D. incanum inoculation.
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Affiliation(s)
| | | | - Francisco Javier Albicoro
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina
| | - María Carla Martini
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina
| | - Walter Draghi
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina
| | - Florencia Alvarez
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina
| | - Antonio Lagares
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina
| | | | - María Florencia Del Papa
- IBBM-Instituto de Biotecnología y Biología Molecular, CONICET-Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Calles 47 y 115 (1900), La Plata, Argentina.
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Haro H, Sanon KB, Le Roux C, Duponnois R, Traoré AS. Improvement of cowpea productivity by rhizobial and mycorrhizal inoculation in Burkina Faso. Symbiosis 2017. [DOI: 10.1007/s13199-017-0478-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bradyrhizobium brasilense sp. nov., a symbiotic nitrogen-fixing bacterium isolated from Brazilian tropical soils. Arch Microbiol 2017; 199:1211-1221. [DOI: 10.1007/s00203-017-1390-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 12/22/2022]
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Tampakaki AP, Fotiadis CT, Ntatsi G, Savvas D. Phylogenetic multilocus sequence analysis of indigenous slow-growing rhizobia nodulating cowpea ( Vigna unguiculata L.) in Greece. Syst Appl Microbiol 2017; 40:179-189. [DOI: 10.1016/j.syapm.2017.01.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/09/2017] [Accepted: 01/11/2017] [Indexed: 12/01/2022]
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Andrews M, Andrews ME. Specificity in Legume-Rhizobia Symbioses. Int J Mol Sci 2017; 18:E705. [PMID: 28346361 PMCID: PMC5412291 DOI: 10.3390/ijms18040705] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 03/19/2017] [Accepted: 03/21/2017] [Indexed: 11/24/2022] Open
Abstract
Most species in the Leguminosae (legume family) can fix atmospheric nitrogen (N₂) via symbiotic bacteria (rhizobia) in root nodules. Here, the literature on legume-rhizobia symbioses in field soils was reviewed and genotypically characterised rhizobia related to the taxonomy of the legumes from which they were isolated. The Leguminosae was divided into three sub-families, the Caesalpinioideae, Mimosoideae and Papilionoideae. Bradyrhizobium spp. were the exclusive rhizobial symbionts of species in the Caesalpinioideae, but data are limited. Generally, a range of rhizobia genera nodulated legume species across the two Mimosoideae tribes Ingeae and Mimoseae, but Mimosa spp. show specificity towards Burkholderia in central and southern Brazil, Rhizobium/Ensifer in central Mexico and Cupriavidus in southern Uruguay. These specific symbioses are likely to be at least in part related to the relative occurrence of the potential symbionts in soils of the different regions. Generally, Papilionoideae species were promiscuous in relation to rhizobial symbionts, but specificity for rhizobial genus appears to hold at the tribe level for the Fabeae (Rhizobium), the genus level for Cytisus (Bradyrhizobium), Lupinus (Bradyrhizobium) and the New Zealand native Sophora spp. (Mesorhizobium) and species level for Cicer arietinum (Mesorhizobium), Listia bainesii (Methylobacterium) and Listia angolensis (Microvirga). Specificity for rhizobial species/symbiovar appears to hold for Galega officinalis (Neorhizobium galegeae sv. officinalis), Galega orientalis (Neorhizobium galegeae sv. orientalis), Hedysarum coronarium (Rhizobium sullae), Medicago laciniata (Ensifer meliloti sv. medicaginis), Medicago rigiduloides (Ensifer meliloti sv. rigiduloides) and Trifolium ambiguum (Rhizobium leguminosarum sv. trifolii). Lateral gene transfer of specific symbiosis genes within rhizobial genera is an important mechanism allowing legumes to form symbioses with rhizobia adapted to particular soils. Strain-specific legume rhizobia symbioses can develop in particular habitats.
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Affiliation(s)
- Mitchell Andrews
- Faculty of Agriculture and Life Sciences, Lincoln University, PO Box 84, Lincoln 7647, New Zealand.
| | - Morag E Andrews
- Faculty of Agriculture and Life Sciences, Lincoln University, PO Box 84, Lincoln 7647, New Zealand.
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Simões-Araújo JL, Rumjanek NG, Xavier GR, Zilli JÉ. Draft genome sequence of Bradyrhizobium manausense strain BR 3351 T, an effective symbiont isolated from Amazon rainforest. Braz J Microbiol 2017; 48:610-611. [PMID: 28237675 PMCID: PMC5628366 DOI: 10.1016/j.bjm.2016.10.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/06/2016] [Accepted: 10/13/2016] [Indexed: 12/01/2022] Open
Abstract
The strain BR 3351T (Bradyrhizobium manausense) was obtained from nodules of cowpea (Vigna unguiculata L. Walp) growing in soil collected from Amazon rainforest. Furthermore, it was observed that the strain has high capacity to fix nitrogen symbiotically in symbioses with cowpea. We report here the draft genome sequence of strain BR 3351T. The information presented will be important for comparative analysis of nodulation and nitrogen fixation for diazotrophic bacteria. A draft genome with 9,145,311 bp and 62.9% of GC content was assembled in 127 scaffolds using 100 bp pair-end Illumina MiSeq system. The RAST annotation identified 8603 coding sequences, 51 RNAs genes, classified in 504 subsystems.
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Martins da Costa E, de Almeida Ribeiro PR, de Lima W, Palhares Farias T, de Souza Moreira FM. Lima bean nodulates efficiently with Bradyrhizobium strains isolated from diverse legume species. Symbiosis 2017. [DOI: 10.1007/s13199-017-0473-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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WITHDRAWN: Draft genome sequence of Bradyrhizobium pachyrhizi strain BR 3262, an effective microsymbiont recommended for cowpea inoculation in Brazil. Braz J Microbiol 2016. [DOI: 10.1016/j.bjm.2016.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Simões-Araújo JL, Leite J, Marie Rouws LF, Passos SR, Xavier GR, Rumjanek NG, Zilli JÉ. Draft genome sequence of Bradyrhizobium sp. strain BR 3262, an effective microsymbiont recommended for cowpea inoculation in Brazil. Braz J Microbiol 2016; 47:783-784. [PMID: 27216893 PMCID: PMC5052334 DOI: 10.1016/j.bjm.2016.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 03/17/2016] [Indexed: 11/29/2022] Open
Abstract
The strain BR 3262 was isolated from nodule of cowpea (Vigna unguiculata L. Walp) growing in soil of the Atlantic Forest area in Brazil and it is reported as an efficient nitrogen fixing bacterium associated to cowpea. Firstly, this strain was assigned as Bradyrhizobium elkanii, however, recently a more detailed genetic and molecular characterization has indicated it could be a Bradyrhizobium pachyrhizi species. We report here the draft genome sequence of B. pachyrhizi strain BR 3262, an elite bacterium used as inoculant for cowpea. The whole genome with 116 scaffolds, 8,965,178 bp and 63.8% of C+G content for BR 3262 was obtained using Illumina MiSeq sequencing technology. Annotation was added by the RAST prokaryotic genome annotation service and shown 8369 coding sequences, 52 RNAs genes, classified in 504 subsystems.
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Affiliation(s)
| | - Jakson Leite
- Universidade Federal Rural do Rio de Janeiro, Departamento de Solos, Seropédica, Rio de Janeiro, Brazil
| | | | - Samuel Ribeiro Passos
- Universidade Federal Rural do Rio de Janeiro, Departamento de Ciências Ambientais, Seropédica, Rio de Janeiro, Brazil
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Arbeli Z, Garcia-Bonilla E, Pardo C, Hidalgo K, Velásquez T, Peña L, C ER, Avila-Arias H, Molano-Gonzalez N, Brandão PFB, Roldan F. Persistence of pentolite (PETN and TNT) in soil microcosms and microbial enrichment cultures. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:9144-9155. [PMID: 26832872 DOI: 10.1007/s11356-016-6133-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Accepted: 01/19/2016] [Indexed: 06/05/2023]
Abstract
Pentolite is a mixture (1:1) of 2,4,6-trinitrotoluene (TNT) and pentaerythritol tetranitrate (PETN), and little is known about its fate in the environment. This study was aimed to determine the dissipation of pentolite in soils under laboratory conditions. Microcosm experiments conducted with two soils demonstrated that dissipation rate of PETN was significantly slower than that of TNT. Interestingly, the dissipation of PETN was enhanced by the presence of TNT, while PETN did not enhanced the dissipation of TNT. Pentolite dissipation rate was significantly faster under biostimulation treatment (addition of carbon source) in soil from the artificial wetland, while no such stimulation was observed in soil from detonation field. In addition, the dissipation rate of TNT and PETN in soil from artificial wetland under biostimulation was significantly faster than the equivalent abiotic control, although it seems that non-biological processes might also be important for the dissipation of TNT and PETN. Transformation of PETN was also slower during establishment of enrichment culture using pentolite as the sole nitrogen source. In addition, transformation of these explosives was gradually reduced and practically stopped after the forth cultures transfer (80 days). DGGE analysis of bacterial communities from these cultures indicates that all consortia were dominated by bacteria from the order Burkholderiales and Rhodanobacter. In conclusion, our results suggest that PETN might be more persistent than TNT.
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Affiliation(s)
- Ziv Arbeli
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia.
| | - Erika Garcia-Bonilla
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Cindy Pardo
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Kelly Hidalgo
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Trigal Velásquez
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Luis Peña
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Eliana Ramos C
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Helena Avila-Arias
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
| | - Nicolás Molano-Gonzalez
- Study Center of Autoimmune Diseases (CREA), School of Medicine and Health Sciences, Universidad del Rosario, Carrera 24 # 63C-69, Bogotá, Colombia
| | - Pedro F B Brandão
- Laboratorio de Microbiología Ambiental y Aplicada, Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Cra. 30 N. 45-03, Bogotá, Colombia
| | - Fabio Roldan
- Unidad de Saneamiento y Biotecnología Ambiental (USBA), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Cra. 7 N. 43-82, Bogotá, Colombia
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Leite J, Fischer D, Rouws LFM, Fernandes-Júnior PI, Hofmann A, Kublik S, Schloter M, Xavier GR, Radl V. Cowpea Nodules Harbor Non-rhizobial Bacterial Communities that Are Shaped by Soil Type Rather than Plant Genotype. FRONTIERS IN PLANT SCIENCE 2016; 7:2064. [PMID: 28163711 PMCID: PMC5247471 DOI: 10.3389/fpls.2016.02064] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 12/26/2016] [Indexed: 05/04/2023]
Abstract
Many studies have been pointing to a high diversity of bacteria associated to legume root nodules. Even though most of these bacteria do not form nodules with legumes themselves, it was shown that they might enter infection threads when co-inoculated with rhizobial strains. The aim of this work was to describe the diversity of bacterial communities associated with cowpea (Vigna unguiculata L. Walp) root nodules using 16S rRNA gene amplicon sequencing, regarding the factors plant genotype and soil type. As expected, Bradyrhizobium was the most abundant genus of the detected genera. Furthermore, we found a high bacterial diversity associated to cowpea nodules; OTUs related to the genera Enterobacter, Chryseobacterium, Sphingobacterium, and unclassified Enterobacteriacea were the most abundant. The presence of these groups was significantly influenced by the soil type and, to a lesser extent, plant genotype. Interestingly, OTUs assigned to Chryseobacterium were highly abundant, particularly in samples obtained from an Ultisol soil. We confirmed their presence in root nodules and assessed their diversity using a target isolation approach. Though their functional role still needs to be addressed, we postulate that Chryseobacterium strains might help cowpea plant to cope with salt stress in semi-arid regions.
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Affiliation(s)
- Jakson Leite
- Soil Science Department, Universidade Federal Rural do Rio de JaneiroSeropédica, Brazil
| | - Doreen Fischer
- Embrapa AgrobiologiaSeropédica, Brazil
- Research Unit Environmental Genomics, Helmholtz Zentrum MünchenOberschleißheim, Germany
| | | | | | - Andreas Hofmann
- Embrapa AgrobiologiaSeropédica, Brazil
- Research Unit Environmental Genomics, Helmholtz Zentrum MünchenOberschleißheim, Germany
| | - Susanne Kublik
- Research Unit Environmental Genomics, Helmholtz Zentrum MünchenOberschleißheim, Germany
| | - Michael Schloter
- Research Unit Environmental Genomics, Helmholtz Zentrum MünchenOberschleißheim, Germany
| | | | - Viviane Radl
- Research Unit Environmental Genomics, Helmholtz Zentrum MünchenOberschleißheim, Germany
- *Correspondence: Viviane Radl,
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Azarias Guimarães A, Florentino LA, Alves Almeida K, Lebbe L, Barroso Silva K, Willems A, de Souza Moreira FM. High diversity of Bradyrhizobium strains isolated from several legume species and land uses in Brazilian tropical ecosystems. Syst Appl Microbiol 2015; 38:433-41. [DOI: 10.1016/j.syapm.2015.06.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/05/2015] [Accepted: 06/12/2015] [Indexed: 10/23/2022]
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Silva FV, De Meyer SE, Simões-Araújo JL, Barbé TDC, Xavier GR, O'Hara G, Ardley JK, Rumjanek NG, Willems A, Zilli JE. Bradyrhizobium manausense sp. nov., isolated from effective nodules of Vigna unguiculata grown in Brazilian Amazonian rainforest soils. Int J Syst Evol Microbiol 2014; 64:2358-2363. [PMID: 24744018 DOI: 10.1099/ijs.0.061259-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Root nodule bacteria were trapped within cowpea (Vigna unguiculata) in soils with different cultivation histories collected from the Amazonian rainforest in northern Brazil. Analysis of the 16S rRNA gene sequences of six strains (BR 3351(T), BR 3307, BR 3310, BR 3315, BR 3323 BR and BR 3361) isolated from cowpea nodules showed that they formed a distinct group within the genus Bradyrhizobium, which was separate from previously identified type strains. Phylogenetic analyses of three housekeeping genes (glnII, recA and rpoB) revealed that Bradyrhizobium huanghuaihaiense CCBAU 23303(T) was the most closely related type strain (96% sequence similarity or lower). Chemotaxonomic data, including fatty acid profiles (predominant fatty acids being C16 : 0 and summed feature 8), the slow growth rate and carbon compound utilization patterns supported the assignment of the strains to the genus Bradyrhizobium. The results of DNA-DNA hybridizations, antibiotic resistance and physiological tests differentiated these novel strains from the most closely related species of the genus Bradyrhizobium with validly published names. Symbiosis-related genes for nodulation (nodC) and nitrogen fixation (nifH) grouped the novel strains of the genus Bradyrhizobium together with Bradyrhizobium iriomotense strain EK05(T), with 94% and 96% sequence similarity, respectively. Based on these data, these six strains represent a novel species for which the name Brabyrhizobium manausense sp. nov. (BR 3351(T) = HAMBI 3596(T)), is proposed.
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Affiliation(s)
- Flavia V Silva
- Departamento de Ciências, Universidade do Estado do Rio de Janeiro, Rua Dr. Francisco Portela, 1470, São Gonçalo, Rio de Janeiro 24435-000, Brazil
| | - Sofie E De Meyer
- Laboratory of Microbiology, Department of Biochemistry and Microbiology (WE10), Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium.,Centre for Rhizobium Studies, Murdoch University, 90 South Street, Murdoch 6150, Western Australia, Australia
| | - Jean L Simões-Araújo
- Embrapa Agrobiologia, Rodovia BR 465 km 07, Seropédica, Rio de Janeiro 23891-000, Brazil
| | - Tatiane da Costa Barbé
- Embrapa Agrobiologia, Rodovia BR 465 km 07, Seropédica, Rio de Janeiro 23891-000, Brazil
| | - Gustavo R Xavier
- Embrapa Agrobiologia, Rodovia BR 465 km 07, Seropédica, Rio de Janeiro 23891-000, Brazil
| | - Graham O'Hara
- Centre for Rhizobium Studies, Murdoch University, 90 South Street, Murdoch 6150, Western Australia, Australia
| | - Julie K Ardley
- Centre for Rhizobium Studies, Murdoch University, 90 South Street, Murdoch 6150, Western Australia, Australia
| | - Norma G Rumjanek
- Embrapa Agrobiologia, Rodovia BR 465 km 07, Seropédica, Rio de Janeiro 23891-000, Brazil
| | - Anne Willems
- Laboratory of Microbiology, Department of Biochemistry and Microbiology (WE10), Ghent University, K. L. Ledeganckstraat 35, B-9000 Ghent, Belgium
| | - Jerri E Zilli
- Embrapa Agrobiologia, Rodovia BR 465 km 07, Seropédica, Rio de Janeiro 23891-000, Brazil
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MALDI-TOF mass spectrometry as a tool for differentiation of Bradyrhizobium species: application to the identification of Lupinus nodulating strains. Syst Appl Microbiol 2013; 36:565-71. [PMID: 24168963 DOI: 10.1016/j.syapm.2013.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 09/14/2013] [Accepted: 09/23/2013] [Indexed: 11/22/2022]
Abstract
Genus Bradyrhizobium includes slow growing bacteria able to nodulate different legumes as well as species isolated from plant tumours. The slow growth presented by the members of this genus and the phylogenetic closeness of most of its species difficults their identification. In the present work we applied for the first time Matrix-Assisted Laser Desorption Ionization-Time-of-Flight Mass Spectrometry (MALDI-TOF MS) to the analysis of Bradyrhizobium species after the extension of MALDI Biotyper 2.0 database with the currently valid species of this genus. With this methodology it was possible to identify strains belonging to phylogenetically closely related species of genus Bradyrhizobium allowing the discrimination among species with rrs gene identities higher than 99%. The application of MALDI-TOF MS to strains isolated from nodules of different Lupinus species in diverse geographical locations allowed their correct identification when comparing with the results of rrs gene and ITS analyses. The nodulation of Lupinus gredensis, an endemic species of the west of Spain, by B. canariense supports the European origin of this species.
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Mendes R, Garbeva P, Raaijmakers JM. The rhizosphere microbiome: significance of plant beneficial, plant pathogenic, and human pathogenic microorganisms. FEMS Microbiol Rev 2013; 37:634-63. [DOI: 10.1111/1574-6976.12028] [Citation(s) in RCA: 1382] [Impact Index Per Article: 125.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Revised: 05/22/2013] [Accepted: 05/27/2013] [Indexed: 12/18/2022] Open
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