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Baldani JI, Dos Santos Ferreira N, Shwab S, Reis VM, de Barros Soares LH, Simões-Araujo JL, Dos Santos Dourado F, Bach E, Camacho NN, de Oliveira AM, Alves BJR, Silva AL, Rossi CN, de Oliveira Junior AF, Zilli JE. Nitrospirillum viridazoti sp. nov., an Efficient Nitrogen-Fixing Species Isolated from Grasses. Curr Microbiol 2024; 81:144. [PMID: 38630311 DOI: 10.1007/s00284-024-03665-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 03/06/2024] [Indexed: 04/19/2024]
Abstract
A group of Gram-negative plant-associated diazotrophic bacteria belonging to the genus Nitrospirillum was investigated, including both previously characterized and newly isolated strains from diverse regions and biomes, predominantly in Brazil. Phylogenetic analysis of 16S rRNA and recA genes revealed the formation of a distinct clade consisting of thirteen strains, separate from the formally recognized species N. amazonense (the closest species) and N. iridis. Comprehensive taxonomic analyses using the whole genomes of four strains (BR 11140T = AM 18T = Y-2T = DSM 2788T = ATCC 35120T, BR 11142T = AM 14T = Y-1T = DSM 2787T = ATCC 35119T, BR 11145 = CBAmC, and BR 12005) supported the division of these strains into two species: N. amazonense (BR 11142 T and BR 12005) and a newly proposed species (BR 11140 T and BR 11145), distinct from N. iridis. The phylogenomic analysis further confirmed the presence of the new Nitrospirillum species. Additionally, MALDI-TOF MS analysis of whole-cell mass spectra provided further evidence for the differentiation of the proposed Nitrospirillum species, separate from N. amazonense. Analysis of chemotaxonomy markers (i.e., genes involved in fatty acid synthesis, metabolism and elongation, phospholipid synthesis, and quinone synthesis) revealed that the new species highlights high similarity and evolutionary convergence with other Nitrospirillum species. This new species exhibited nitrogen fixation ability in vitro, it has similar NifHDK protein phylogeny position with the closest species, lacked denitrification capability, but possessed the nosZ gene, enabling N2O reduction, distinguishing it from the closest species. Despite being isolated from diverse geographic regions, soil types, and ecological niches, no significant phenotypic or physiological differences were observed between the proposed new species and N. amazonense. Based on these findings, a new species, Nitrospirillum viridazoti sp. nov., was classified, with the strain BR 11140T (DSM 2788T, ATCC 35120T) designated as the type strain.
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Affiliation(s)
- José Ivo Baldani
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil
| | | | - Stefan Shwab
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil
| | - Veronica Massena Reis
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil
| | | | | | | | - Evelise Bach
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), IB-UFRGS, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil
| | | | - Amanda Maura de Oliveira
- Universidade Federal Rural do Rio de Janeiro (UFRRJ), BR 465 km 07, Seropedica, RJ, 23,890-970, Brazil
| | | | - Andréia Loviane Silva
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil
| | - Carolina Nachi Rossi
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil
| | | | - Jerri Edson Zilli
- Embrapa Agrobiologia, BR 465 km 07, Bairro Ecologia, Seropedica, RJ, 23891-000, Brazil.
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Homem BGC, Borges LPC, de Lima IBG, Guimarães BC, Spasiani PP, Ferreira IM, Meo-Filho P, Berndt A, Alves BJR, Urquiaga S, Boddey RM, Casagrande DR. Forage peanut legume as a strategy for improving beef production without increasing livestock greenhouse gas emissions. Animal 2024; 18:101158. [PMID: 38703756 DOI: 10.1016/j.animal.2024.101158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 05/06/2024] Open
Abstract
The transformation of pastures from a degraded state to sustainable productivity is a major challenge in tropical livestock production. Stoloniferous forage legumes such as Arachis pintoi (forage peanut) are one of the most promising alternatives for intensifying pasture-based beef livestock operations with reduced greenhouse gas (GHG) emissions. This 2-year study assessed beef cattle performance, nutrient intake and digestibility, and balance of GHG emissions in three pasture types (PT): (1) mixed Palisade grass - Urochloa brizantha (Hochst. ex A. Rich.) R.D. Webster (syn. Brachiaria brizantha Stapf cv. Marandu) and forage peanut (A. pintoi Krapov. & W.C. Greg. cv. BRS Mandobi) pastures (Mixed), (2) monoculture Palisade grass pastures with 150 kg of N/ha per year (Fertilised), and (3) monoculture Palisade grass without N fertiliser (Control). Continuous stocking with a variable stocking rate was used in a randomised complete block design, with four replicates per treatment. The average daily gain and carcass gain were not influenced by the PT (P = 0.439 and P = 0.100, respectively) and were, on average, 0.433 kg/animal per day and 83.4 kg/animal, respectively. Fertilised and Mixed pastures increased by 102 and 31.5%, respectively, the liveweight gain per area (kg/ha/yr) compared to the Control pasture (P < 0.001). The heifers in the Mixed pasture had lower CH4 emissions (g/animal per day; P = 0.009), achieving a reduction of 12.6 and 10.1% when compared to the Fertilised and Control pastures, respectively. Annual (N2O) emissions (g/animal) and per kg carcass weight gain were 59.8 and 63.1% lower, respectively, in the Mixed pasture compared to the Fertilised pasture (P < 0.001). Mixed pasture mitigated approximately 23% of kg CO2eq/kg of carcass when substituting 150 kg of N/ha per year via fertiliser. Mixed pastures with forage peanut are a promising solution to recover degraded tropical pastures by providing increased animal production with lower GHG emissions.
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Affiliation(s)
- B G C Homem
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil; Embrapa Agrobiologia, Rodovia BR-465, km 7, Seropédica 23897-970 RJ, Brazil
| | - L P C Borges
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil
| | - I B G de Lima
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil
| | - B C Guimarães
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil
| | - P P Spasiani
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil
| | - I M Ferreira
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil
| | - P Meo-Filho
- Embrapa Southeast Livestock, Rodovia Washington Luiz, km 234, Sao Carlos, SP 13560-970, Brazil
| | - A Berndt
- Embrapa Southeast Livestock, Rodovia Washington Luiz, km 234, Sao Carlos, SP 13560-970, Brazil
| | - B J R Alves
- Embrapa Agrobiologia, Rodovia BR-465, km 7, Seropédica 23897-970 RJ, Brazil
| | - S Urquiaga
- Embrapa Agrobiologia, Rodovia BR-465, km 7, Seropédica 23897-970 RJ, Brazil
| | - R M Boddey
- Department of Soil Science, Federal Rural University of Rio de Janeiro, Rodovia BR 465, km 7, Seropédica, RJ 23897-000, Brazil
| | - D R Casagrande
- Department of Animal Sciences, Federal University of Lavras, UFLA, Lavras, MG 37200-900, Brazil.
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de Kássia Gomes F, Homem BGC, Guimaraes BC, de Arruda Camargo Danes M, Broderick GA, Alves BJR, Boddey RM, Casagrande DR. Carbohydrates and protein digestive traits in beef cattle grazing fertilised or mixed tropical pasture. Arch Anim Nutr 2024; 78:60-77. [PMID: 38488818 DOI: 10.1080/1745039x.2024.2319936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/01/2024] [Indexed: 04/30/2024]
Abstract
This study was performed to investigate the nitrogen (N) and carbohydrate digestive traits of grazing heifers. The experiment was carried out at the Federal University of Lavras. The treatments were a Marandu palisadegrass (Urochloa brizantha [Syn, Brachiaria brizantha] Stapf. A. Rich. cv. Marandu) monoculture fertilised with 150 kg N/[ha ∙ year] (FP) or Marandu palisadegrass mixed pasture with forage peanut (MP). The pastures were grazed by six rumen-cannulated zebu heifers. A double cross-over design was used in four periods. Nutritive value, intake and apparent digestibility of forage, ruminal traits and kinetics and N balance were evaluated. Apparent total-tract digestibility of dry matter (DM) and neutral detergent fibre (NDF) were greater for FP than for MP. There was no effect in apparent total-tract digestibility of N. The estimated intestinal digestibility of nutrients was greater on MP than FP. Even though N intake and faecal N output were greater on MP than FP, there was no effect in urine N output. The N balance tended to be greater on MP than FP. The forage peanut, which contains condensed tannins, decreased ruminal fibre degradation, apparent digestibility and ruminal protein degradation, increased N flow from the rumen. Inclusion of forage peanut in the mixed pasture decreased the ruminal fibre degradability but increased N retention by the animals.
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Monteiro DA, Fonseca EDS, Rodrigues RDAR, da Silva JJN, da Silva EP, Balieiro FDC, Alves BJR, Rachid CTCDC. Structural and functional shifts of soil prokaryotic community due to Eucalyptus plantation and rotation phase. Sci Rep 2020; 10:9075. [PMID: 32493970 PMCID: PMC7270125 DOI: 10.1038/s41598-020-66004-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/27/2020] [Indexed: 11/09/2022] Open
Abstract
Agriculture, forestry and other land uses are currently the second highest source of anthropogenic greenhouse gases (GHGs) emissions. In soil, these gases derive from microbial activity, during carbon (C) and nitrogen (N) cycling. To investigate how Eucalyptus land use and growth period impact the microbial community, GHG fluxes and inorganic N levels, and if there is a link among these variables, we monitored three adjacent areas for 9 months: a recently planted Eucalyptus area, fully developed Eucalyptus forest (final of rotation) and native forest. We assessed the microbial community using 16S rRNA gene sequencing and qPCR of key genes involved in C and N cycles. No considerable differences in GHG flux were evident among the areas, but logging considerably increased inorganic N levels. Eucalyptus areas displayed richer and more diverse communities, with selection for specific groups. Land use influenced communities more extensively than the time of sampling or growth phase, although all were significant modulators. Several microbial groups and genes shifted temporally, and inorganic N levels shaped several of these changes. No correlations among microbial groups or genes and GHG were found, suggesting no link among these variables in this short-rotation Eucalyptus study.
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Affiliation(s)
- Douglas Alfradique Monteiro
- LABEM - Laboratory of Biotechnology and Microbial Ecology, Institute of Microbiology Paulo de Góes, Department of General Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eduardo da Silva Fonseca
- LABEM - Laboratory of Biotechnology and Microbial Ecology, Institute of Microbiology Paulo de Góes, Department of General Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | | | | | | | - Caio Tavora Coelho da Costa Rachid
- LABEM - Laboratory of Biotechnology and Microbial Ecology, Institute of Microbiology Paulo de Góes, Department of General Microbiology, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
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Sarabia-Salgado L, Solorio-Sánchez F, Ramírez-Avilés L, Rodrigues Alves BJ, Ku-Vera J, Aguilar-Pérez C, Urquiaga S, Boddey RM. Increase in Milk Yield from Cows through Improvement of Forage Production Using the N 2-Fixing Legume Leucaena leucocephala in a Silvopastoral System. Animals (Basel) 2020; 10:ani10040734. [PMID: 32340205 PMCID: PMC7222761 DOI: 10.3390/ani10040734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/13/2020] [Accepted: 04/21/2020] [Indexed: 11/16/2022] Open
Abstract
Simple Summary In tropical livestock production, forage availability and quality are a serious constraint for milk and meat production. There is an urgent need to reduce the environmental impact of animal production while increasing productivity. The use of legume trees or shrubs associated with grasses effectively increased milk production and decreased the need to use nitrogen fertilizers by taking advantage of atmospheric nitrogen fixation. Abstract The objective was to evaluate milk production, N2-fixation and N transfer, forage yield and composition (under two cutting intervals) in a silvopastoral system (SPS) with Leucaena leucocephala-Megathyrsus maximus and M. maximus-monoculture (MMM) with crossbred cows in a completely randomized design. Forage yield in the SPS was 6490 and 6907 kg DM ha−1 for cutting intervals (CI) of 35 and 50 days. Forage yield for the MMM was 7284 and 10,843 kg DM ha−1, and forage crude protein (CP) was 29.0% and 26.1% for L. leucocephala, harvested at 35 and 50 days, respectively. CP for the associated M. maximus was 9.9% and 7.8% for CI 35 and 50 days, respectively, and for MMM was 7.4% and 8.4%, harvested at 35 and 50 days. Milk production was 4.7 kg cow−1 day−1 for cows grazing MMM and 7.4 kg cow−1 day−1 under SPS. Nitrogen fixation in L. leucocephala (%Ndfa) was estimated to be 89% and 95%, at 35 and 50 days, with an N2 transfer to the associated grass of 34.3% and 52.9%. SPS has the potential to fix and transfer important amounts of N2 to the associated grass, and increase forage CP content and milk production.
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Affiliation(s)
- Lucero Sarabia-Salgado
- Department of Soils, Federal Rural University of Rio de Janeiro (UFRRJ), Seropédica, Rio de Janeiro 23897-000, Brazil
- Correspondence:
| | - Francisco Solorio-Sánchez
- Faculty of Veterinary Medicine and Animal Science, Autonomous University of Yucatán, Mérida, Yucatán 97315, Mexico; (F.S.-S.); (L.R.-A.); (J.K.-V.); (C.A.-P.)
| | - Luis Ramírez-Avilés
- Faculty of Veterinary Medicine and Animal Science, Autonomous University of Yucatán, Mérida, Yucatán 97315, Mexico; (F.S.-S.); (L.R.-A.); (J.K.-V.); (C.A.-P.)
| | - Bruno José Rodrigues Alves
- Embrapa Agrobiologia, Brazilian Corporation for Agricultural Research—National Centre for Agrobiology Research, Seropédica, Rio de Janeiro 23891-000, Brazil; (B.J.R.A.); (S.U.); (R.M.B.)
| | - Juan Ku-Vera
- Faculty of Veterinary Medicine and Animal Science, Autonomous University of Yucatán, Mérida, Yucatán 97315, Mexico; (F.S.-S.); (L.R.-A.); (J.K.-V.); (C.A.-P.)
| | - Carlos Aguilar-Pérez
- Faculty of Veterinary Medicine and Animal Science, Autonomous University of Yucatán, Mérida, Yucatán 97315, Mexico; (F.S.-S.); (L.R.-A.); (J.K.-V.); (C.A.-P.)
| | - Segundo Urquiaga
- Embrapa Agrobiologia, Brazilian Corporation for Agricultural Research—National Centre for Agrobiology Research, Seropédica, Rio de Janeiro 23891-000, Brazil; (B.J.R.A.); (S.U.); (R.M.B.)
| | - Robert Michael Boddey
- Embrapa Agrobiologia, Brazilian Corporation for Agricultural Research—National Centre for Agrobiology Research, Seropédica, Rio de Janeiro 23891-000, Brazil; (B.J.R.A.); (S.U.); (R.M.B.)
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Cardoso ADS, Alves BJR, Urquiaga S, Boddey RM. Effect of volume of urine and mass of faeces on N2O and CH4 emissions of dairy-cow excreta in a tropical pasture. Anim Prod Sci 2018. [DOI: 10.1071/an15392] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We aimed to quantify nitrous oxide (N2O) and methane (CH4) emissions as a function of the addition of different quantities of bovine faeces and urine on soil under pasture. Two experiments were performed in randomised complete blocks with five replicates. In the first experiment, the emissions of CH4 and N2O were evaluated for 14 days after the addition of four amounts of faeces (0.0, 1.2, 1.8 and 2.4 kg of fresh faeces per plot), and in a second experiment, N2O emissions were evaluated for 43 days after addition of four volumes of urine (0.0, 1.0, 1.5 and 2.0 L). Urine and faeces came from crossbred (Fresian × Gir) dairy cows fed on pasture and concentrates. N2O emissions from faeces did not alter the emission factor (EF) according to the faeces weight (P = 0.73). N2O-N EF from faeces-N averaged 0.18% (±0.05) of total applied N. The volume of urine applied influenced N2O losses. The EF decreased linearly (P = 0.015) with increasing volumes of urine, being 4.9% (±0.75), 3.36% (±0.7) and 2.43% (±0.46) of N applied emitted as N2O for the 1.0, 1.5 and 2.0 L volumes of urine respectively. The EF from urine was significantly (P < 0.0001) higher than the EF from faeces. There was no change to the CH4 emissions per kilogram of excreta when the amount of faeces added was varied (P = 0.87). However, the CH4 emitted increased linearly with the amount of faeces (P = 0.02). The CH4 EF was estimated to be 0.95 (±0.38) kg/head.year.
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