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de Oliveira LS, Furtado LL, Diniz FDADS, Mendes BL, de Araújo TR, Silva LP, Santiago TR. Eco-Friendly Silver Nanoparticles Synthesized from a Soybean By-Product with Nematicidal Efficacy against Pratylenchus brachyurus. Nanomaterials (Basel) 2023; 14:101. [PMID: 38202556 PMCID: PMC10780907 DOI: 10.3390/nano14010101] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 01/12/2024]
Abstract
This study explores an eco-friendly approach to synthesizing silver nanoparticles (AgNPs) using soybean leaf extracts, employing a reaction with silver nitrate at 65 °C for 2.5 h. Optimal results were achieved at extract concentrations of 3.12 and 6.25 mg of the leaf mL-1, termed 3.12AgNP and 6.25AgNP, respectively. UV-Vis spectrophotometric analysis between 350 and 550 nm exhibited a peak at 410-430 nm, along with a color transition in the suspensions from pale yellow to brown, indicating successful synthesis. Dynamic light scattering (DLS) further delineated the favorable properties of these AgNPs, including nanometric dimensions (73-104 nm), negative charge, and moderate polydispersity, portraying stable and reproducible synthesis reactions. The bioreduction mechanism, possibly expedited by leaf extract constituents such as amino acids, phenolic acids, and polysaccharides, remains to be fully elucidated. Notably, this study underscored the potent nematicidal effectiveness of biosynthesized AgNPs, especially 6.25AgNP, against Pratylenchus brachyurus, which is a common plant-parasitic nematode in tropical soybean cultivation regions. In vitro tests illustrated significant nematicidal activity at concentrations above 25 µmol L-1, while in vivo experiments displayed a pronounced nematode population diminishment in plant roots, particularly with a 6.25AgNP rhizosphere application at concentrations of 500 µmol L-1 or twice at 250 µmol L-1, attaining a reproduction factor below 1 without any morphological nematode alterations. This research highlights the potential of 6.25AgNPs derived from soybean leaf extracts in forging sustainable nematicidal solutions, marking a significant stride toward eco-friendly phytonematode management in soybean cultivation. This novel methodology signals a promising avenue in harnessing botanical resources for nematode control and propelling a greener agricultural horizon.
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Grants
- 421810/2021-1, 311825/2021-4, 307853/2018-7, 408857/2016-1, 306413/2014-0, and 563802/2010-3 National Council for Scientific and Technological Development
- 23038.019088/2009-58 Coordenação de Aperfeicoamento de Pessoal de Nível Superior
- 10.20.03.009.00.00, 23.17.00.069.00.02, 13.17.00.037.00.00, 21.14.03.001.03.05, 13.14.03.010.00.02, 12.16.04.010.00.06, 22.16.05.016.00.04, and 11.13.06.001.06.03 Brazilian Agricultural Research Corporation
- 00193-00000783/2021-16 and 00193-001392/2016 Fundação de Amparo à Pesquisa do Distrito Federal
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Affiliation(s)
- Letícia Santana de Oliveira
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
| | - Leila Lourenço Furtado
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
| | - Francisco de Assis dos Santos Diniz
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
| | - Bruno Leonardo Mendes
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
| | - Thalisson Rosa de Araújo
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
| | - Luciano Paulino Silva
- Laboratório de Nanobiotecnologia (LNANO), Embrapa Recursos Genéticos e Biotecnologia, PBI, Brasília 70770-917, DF, Brazil;
| | - Thaís Ribeiro Santiago
- Departamento de Fitopatologia, Universidade de Brasília, Brasília 70910-900, DF, Brazil; (L.S.d.O.); (L.L.F.); (F.d.A.d.S.D.); (B.L.M.); (T.R.d.A.)
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Duarte KE, Basso MF, de Oliveira NG, da Silva JCF, de Oliveira Garcia B, Cunha BADB, Cardoso TB, Nepomuceno AL, Kobayashi AK, Santiago TR, de Souza WR, Molinari HBC. MicroRNAs expression profiles in early responses to different levels of water deficit in Setaria viridis. Physiol Mol Biol Plants 2022; 28:1607-1624. [PMID: 36389096 PMCID: PMC9530107 DOI: 10.1007/s12298-022-01226-z] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 06/16/2023]
Abstract
UNLABELLED Water deficit is a major constraint for crops of economic importance in almost all agricultural regions. However, plants have an active defense system to adapt to these adverse conditions, acting in the reprogramming of gene expression responsible for encoding microRNAs (miRNAs). These miRNAs promote the regulation to the target gene expression by the post-transcriptional (PTGS) and transcriptional gene silencing (TGS), modulating several pathways including defense response to water deficit. The broader knowledge of the miRNA expression profile and its regulatory networks in response to water deficit can provide evidence for the development of new biotechnological tools for genetic improvement of several important crops. In this study, we used Setaria viridis accession A10.1 as a C4 model plant to widely investigate the miRNA expression profile in early responses to different levels of water deficit. Ecophysiological studies in Setaria viridis under water deficit and after rewatering demonstrated a drought tolerant accession, capable of a rapid recovery from the stress. Deep small RNA sequencing and degradome studies were performed in plants submitted to drought to identify differentially expressed miRNA genes and their predicted targets, using in silico analysis. Our findings showed that several miRNAs were differentially modulated in response to distinctive levels of water deficit and after rewatering. The predicted mRNA targets mainly corresponded to genes related to cell wall remodeling, antioxidant system and drought-related transcription factors, indicating that these genes are rapidly regulated in early responses to drought stress. The implications of these modulations are extensively discussed, and higher-effect miRNAs are suggested as major players for potential use in genetic engineering to improve drought tolerance in economically important crops, such as sugarcane, maize, and sorghum. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12298-022-01226-z.
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Affiliation(s)
- Karoline Estefani Duarte
- Embrapa Agroenergy, Brasília, DF 70297-400 Brazil
- Federal University of ABC, Santo André, SP 09210-580 Brazil
| | - Marcos Fernando Basso
- Embrapa Agroenergy, Brasília, DF 70297-400 Brazil
- BIOMOL/BIOTEC Laboratory, Mato Grosso Cotton Institute (IMAmt), Rondonópolis, MT 78740-970 Brazil
| | | | | | - Bruno de Oliveira Garcia
- Embrapa Agroenergy, Brasília, DF 70297-400 Brazil
- Federal University of Lavras, Lavras, MG 37200-900 Brazil
| | | | | | | | | | - Thaís Ribeiro Santiago
- Embrapa Agroenergy, Brasília, DF 70297-400 Brazil
- University of Brasília, Brasília, DF 70910-900 Brazil
| | - Wagner Rodrigo de Souza
- Embrapa Agroenergy, Brasília, DF 70297-400 Brazil
- Federal University of ABC, Santo André, SP 09210-580 Brazil
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Touzdjian Pinheiro Kohlrausch Távora F, de Assis dos Santos Diniz F, de Moraes Rêgo-Machado C, Chagas Freitas N, Barbosa Monteiro Arraes F, Chumbinho de Andrade E, Furtado LL, Osiro KO, Lima de Sousa N, Cardoso TB, Márcia Mertz Henning L, Abrão de Oliveira Molinari P, Feingold SE, Hunter WB, Fátima Grossi de Sá M, Kobayashi AK, Lima Nepomuceno A, Santiago TR, Correa Molinari HB. CRISPR/Cas- and Topical RNAi-Based Technologies for Crop Management and Improvement: Reviewing the Risk Assessment and Challenges Towards a More Sustainable Agriculture. Front Bioeng Biotechnol 2022; 10:913728. [PMID: 35837551 PMCID: PMC9274005 DOI: 10.3389/fbioe.2022.913728] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 06/06/2022] [Indexed: 11/13/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated gene (Cas) system and RNA interference (RNAi)-based non-transgenic approaches are powerful technologies capable of revolutionizing plant research and breeding. In recent years, the use of these modern technologies has been explored in various sectors of agriculture, introducing or improving important agronomic traits in plant crops, such as increased yield, nutritional quality, abiotic- and, mostly, biotic-stress resistance. However, the limitations of each technique, public perception, and regulatory aspects are hindering its wide adoption for the development of new crop varieties or products. In an attempt to reverse these mishaps, scientists have been researching alternatives to increase the specificity, uptake, and stability of the CRISPR and RNAi system components in the target organism, as well as to reduce the chance of toxicity in nontarget organisms to minimize environmental risk, health problems, and regulatory issues. In this review, we discuss several aspects related to risk assessment, toxicity, and advances in the use of CRISPR/Cas and topical RNAi-based technologies in crop management and breeding. The present study also highlights the advantages and possible drawbacks of each technology, provides a brief overview of how to circumvent the off-target occurrence, the strategies to increase on-target specificity, the harm/benefits of association with nanotechnology, the public perception of the available techniques, worldwide regulatory frameworks regarding topical RNAi and CRISPR technologies, and, lastly, presents successful case studies of biotechnological solutions derived from both technologies, raising potential challenges to reach the market and being social and environmentally safe.
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Affiliation(s)
| | | | | | | | | | | | | | - Karen Ofuji Osiro
- Department of Phytopathology, University of Brasília, Brasília, Brazil
- Embrapa Agroenergy, Brasília, Brazil
| | | | | | | | | | | | - Wayne B. Hunter
- USDA-ARS, U.S. Horticultural Research Laboratory, Fort Pierce, FL, United States
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Ribeiro AP, Vinecky F, Duarte KE, Santiago TR, das Chagas Noqueli Casari RA, Hell AF, da Cunha BADB, Martins PK, da Cruz Centeno D, de Oliveira Molinari PA, de Almeida Cançado GM, Magalhães JVD, Kobayashi AK, de Souza WR, Molinari HBC. Enhanced aluminum tolerance in sugarcane: evaluation of SbMATE overexpression and genome-wide identification of ALMTs in Saccharum spp. BMC Plant Biol 2021; 21:300. [PMID: 34187360 PMCID: PMC8240408 DOI: 10.1186/s12870-021-02975-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 04/14/2021] [Indexed: 06/01/2023]
Abstract
BACKGROUND A major limiting factor for plant growth is the aluminum (Al) toxicity in acidic soils, especially in tropical regions. The exclusion of Al from the root apex through root exudation of organic acids such as malate and citrate is one of the most ubiquitous tolerance mechanisms in the plant kingdom. Two families of anion channels that confer Al tolerance are well described in the literature, ALMT and MATE family. RESULTS In this study, sugarcane plants constitutively overexpressing the Sorghum bicolor MATE gene (SbMATE) showed improved tolerance to Al when compared to non-transgenic (NT) plants, characterized by sustained root growth and exclusion of aluminum from the root apex based on the result obtained with hematoxylin staining. In addition, genome-wide analysis of the recently released sugarcane genome identified 11 ALMT genes and molecular studies showed potential new targets for aluminum tolerance. CONCLUSIONS Our results indicate that the transgenic plants overexpressing the Sorghum bicolor MATE has an improved tolerance to Al. The expression profile of ALMT genes revels potential candidate genes to be used has an alternative for agricultural expansion in Brazil and other areas with aluminum toxicity in poor and acid soils.
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Affiliation(s)
- Ana Paula Ribeiro
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil
| | - Felipe Vinecky
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil
| | - Karoline Estefani Duarte
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP, 09606-045, Brazil
| | - Thaís Ribeiro Santiago
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil
- Phytopathology Department, University of Brasília, Brasília, Distrito Federal, 70910-900, Brazil
| | | | - Aline Forgatti Hell
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP, 09606-045, Brazil
| | | | - Polyana Kelly Martins
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil
| | - Danilo da Cruz Centeno
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP, 09606-045, Brazil
| | | | | | | | | | - Wagner Rodrigo de Souza
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy, Brasilia, 70770-901, DF, Brazil.
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP, 09606-045, Brazil.
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Santiago TR, Lopes CA, Caetano-Anollés G, Mizubuti ESG. Genetic Structure of Ralstonia solanacearum and Ralstonia pseudosolanacearum in Brazil. Plant Dis 2020; 104:1019-1025. [PMID: 31994983 DOI: 10.1094/pdis-09-19-1929-re] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bacterial wilt-causing Ralstonia threaten numerous crops throughout the world. We studied the population structure of 196 isolates of Ralstonia solanacearum and 39 isolates of Ralstonia pseudosolanacearum, which were collected from potato- and tomato-growing areas in 19 states of Brazil. Regardless of the species, three groups of isolates were identified. One group encompassed R. pseudosolanacearum isolates. The other two groups comprise isolates of R. solanacearum (phylotype II) split according to geographic regions, one made of isolates from the North and Northeast and the other made of isolates from the Central, Southeast, and South regions (CSS). Among the isolates collected in CSS, those from tomato were genetically distinct from the potato isolates. The genetic variability in the population of R. pseudosolanacearum was lower than that of R. solanacearum, suggesting that the former was introduced in Brazil. Conversely, the high genetic variability of R. solanacearum in all regions, hosts, and times supports the hypothesis that this species is autochthonous in South America, more precisely in Brazil and Peru. For R. solanacearum, higher variability and lower migration rates were observed when tomato isolates were analyzed, indicating that the variability is caused mainly by the differences of the local, native soil population. The North subpopulation was distinct from all others, possibly because of differences in environmental features of this region. The proximity of some geographic regions and the movement of potato tubers could have facilitated migration and therefore low genetic differentiation between geographic regions. Finally, geography, which also influences host distribution, affects the structure of the population of R. solanacearum in Brazil. Despite quarantine procedures in Brazil, increasing levels of trade are a threat to biosecurity, and these results emphasize the need for improving our regional efforts to prevent the dispersal of pathogens.
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Affiliation(s)
- Thaís Ribeiro Santiago
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36.570-900, Brazil
| | | | | | - Eduardo S G Mizubuti
- Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36.570-900, Brazil
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Rolim L, Santiago TR, dos Reis Junior FB, de Carvalho Mendes I, do Vale HMM, Hungria M, Silva LP. Identification of soybean Bradyrhizobium strains used in commercial inoculants in Brazil by MALDI-TOF mass spectrometry. Braz J Microbiol 2019; 50:905-914. [PMID: 31236871 PMCID: PMC6863279 DOI: 10.1007/s42770-019-00104-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Accepted: 06/08/2019] [Indexed: 11/26/2022] Open
Abstract
Biological nitrogen fixation (BNF) with the soybean crop probably represents the major sustainable technology worldwide, saving billions of dollars in N fertilizers and decreasing water pollution and the emission of greenhouse gases. Accordingly, the identification of strains occupying nodules under field conditions represents a critical step in studies that are aimed at guaranteeing increased BNF contribution. Current methods of identification are mostly based on serology, or on DNA profiles. However, the production of antibodies is restricted to few laboratories, and to obtain DNA profiles of hundreds of isolates is costly and time-consuming. Conversely, the matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) MS technique might represent a golden opportunity for replacing serological and DNA-based methods. However, MALDI-TOF databases of environmental microorganisms are still limited, and, most importantly, there are concerns about the discrimination of protein profiles at the strain level. In this study, we investigated four soybean rhizobial strains carried in commercial inoculants used in over 35 million hectares in Brazil and also in other countries of South America and Africa. A supplementary MALDI-TOF database with the protein profiles of these rhizobial strains was built and allowed the identification of unique profiles statistically supported by multivariate analysis and neural networks. To test this new database, the nodule occupancy by Bradyrhizobium strains in symbiosis with soybean was characterized in a field experiment and the results were compared with serotyping of bacteria by immuno-agglutination. The results obtained by both techniques were highly correlated and confirmed the viability of using the MALDI-TOF MS technique to effectively distinguish bacteria at the strain level.
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Affiliation(s)
- Lucas Rolim
- Universidade de Brasilia (UnB), Brasília, Distrito Federal 70910-900 Brazil
| | - Thaís Ribeiro Santiago
- Embrapa Recursos Genéticos e Biotecnologia, C.P. 02372, Brasília, Distrito Federal 70770-917 Brazil
| | | | | | | | | | - Luciano Paulino Silva
- Universidade de Brasilia (UnB), Brasília, Distrito Federal 70910-900 Brazil
- Embrapa Recursos Genéticos e Biotecnologia, C.P. 02372, Brasília, Distrito Federal 70770-917 Brazil
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Rolim L, Santiago TR, Dos Reis Junior FB, de Carvalho Mendes I, do Vale HMM, Hungria M, Silva LP. Correction to: Identification of soybean Bradyrhizobium strains used in commercial inoculants in Brazil by MALDI-TOF mass spectrometry. Braz J Microbiol 2019; 50:1147-1148. [PMID: 31414367 DOI: 10.1007/s42770-019-00124-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
The original version of this article unfortunately contained a mistake. The presentation of Fig. 1was incorrect. The correct version is given below.
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Affiliation(s)
- Lucas Rolim
- Universidade de Brasilia (UnB), Brasília, Distrito Federal, 70910-900, Brazil
| | - Thaís Ribeiro Santiago
- Embrapa Recursos Genéticos e Biotecnologia, C.P. 02372, Brasília, Distrito Federal, 70770-917, Brazil
| | | | | | | | | | - Luciano Paulino Silva
- Universidade de Brasilia (UnB), Brasília, Distrito Federal, 70910-900, Brazil. .,Embrapa Recursos Genéticos e Biotecnologia, C.P. 02372, Brasília, Distrito Federal, 70770-917, Brazil.
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de Souza WR, Pacheco TF, Duarte KE, Sampaio BL, de Oliveira Molinari PA, Martins PK, Santiago TR, Formighieri EF, Vinecky F, Ribeiro AP, da Cunha BADB, Kobayashi AK, Mitchell RAC, de Sousa Rodrigues Gambetta D, Molinari HBC. Correction to: Silencing of a BAHD acyltransferase in sugarcane increases biomass digestibility. Biotechnol Biofuels 2019; 12:142. [PMID: 31198439 PMCID: PMC6556000 DOI: 10.1186/s13068-019-1482-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
[This corrects the article DOI: 10.1186/s13068-019-1450-7.].
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Affiliation(s)
- Wagner Rodrigo de Souza
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP 09606-045 Brazil
| | - Thályta Fraga Pacheco
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Karoline Estefani Duarte
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Bruno Leite Sampaio
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Polyana Kelly Martins
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Thaís Ribeiro Santiago
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Felipe Vinecky
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Ana Paula Ribeiro
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Adilson Kenji Kobayashi
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
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de Souza WR, Pacheco TF, Duarte KE, Sampaio BL, de Oliveira Molinari PA, Martins PK, Santiago TR, Formighieri EF, Vinecky F, Ribeiro AP, da Cunha BADB, Kobayashi AK, Mitchell RAC, de Sousa Rodrigues Gambetta D, Molinari HBC. Silencing of a BAHD acyltransferase in sugarcane increases biomass digestibility. Biotechnol Biofuels 2019; 12:111. [PMID: 31080518 PMCID: PMC6501328 DOI: 10.1186/s13068-019-1450-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 04/25/2019] [Indexed: 05/25/2023]
Abstract
BACKGROUND Sugarcane (Saccharum spp.) covers vast areas of land (around 25 million ha worldwide), and its processing is already linked into infrastructure for producing bioethanol in many countries. This makes it an ideal candidate for improving composition of its residues (mostly cell walls), making them more suitable for cellulosic ethanol production. In this paper, we report an approach to improving saccharification of sugarcane straw by RNAi silencing of the recently discovered BAHD01 gene responsible for feruloylation of grass cell walls. RESULTS We identified six BAHD genes in the sugarcane genome (SacBAHDs) and generated five lines with substantially decreased SacBAHD01 expression. To find optimal conditions for determining saccharification of sugarcane straw, we tried multiple combinations of solvent and temperature pretreatment conditions, devising a predictive model for finding their effects on glucose release. Under optimal conditions, demonstrated by Organosolv pretreatment using 30% ethanol for 240 min, transgenic lines showed increases in saccharification efficiency of up to 24%. The three lines with improved saccharification efficiency had lower cell-wall ferulate content but unchanged monosaccharide and lignin compositions. CONCLUSIONS The silencing of SacBAHD01 gene and subsequent decrease of cell-wall ferulate contents indicate a promising novel biotechnological approach for improving the suitability of sugarcane residues for cellulosic ethanol production. In addition, the Organosolv pretreatment of the genetically modified biomass and the optimal conditions for the enzymatic hydrolysis presented here might be incorporated in the sugarcane industry for bioethanol production.
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Affiliation(s)
- Wagner Rodrigo de Souza
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
- Centre of Natural Sciences and Humanities, Federal University of ABC, São Bernardo do Campo, SP 09606-045 Brazil
| | - Thályta Fraga Pacheco
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Karoline Estefani Duarte
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Bruno Leite Sampaio
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Polyana Kelly Martins
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Thaís Ribeiro Santiago
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Felipe Vinecky
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | - Ana Paula Ribeiro
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
| | | | - Adilson Kenji Kobayashi
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasília, DF 70770-901 Brazil
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Duarte KE, de Souza WR, Santiago TR, Sampaio BL, Ribeiro AP, Cotta MG, da Cunha BADB, Marraccini PRR, Kobayashi AK, Molinari HBC. Identification and characterization of core abscisic acid (ABA) signaling components and their gene expression profile in response to abiotic stresses in Setaria viridis. Sci Rep 2019; 9:4028. [PMID: 30858491 PMCID: PMC6411973 DOI: 10.1038/s41598-019-40623-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 02/19/2019] [Indexed: 12/21/2022] Open
Abstract
Abscisic acid (ABA) is an essential phytohormone that regulates growth, development and adaptation of plants to environmental stresses. In Arabidopsis and other higher plants, ABA signal transduction involves three core components namely PYR/PYL/RCAR ABA receptors (PYLs), type 2C protein phosphatases (PP2Cs) and class III SNF-1-related protein kinase 2 (SnRK2s). In the present study, we reported the identification and characterization of the core ABA signaling components in Setaria viridis, an emerging model plant for cereals and feedstock crops presenting C4 metabolism, leading to the identification of eight PYL (SvPYL1 to 8), twelve PP2C (SvPP2C1 to 12) and eleven SnRK2 (SvSnRK2.1 through SvSnRK2.11) genes. In order to study the expression profiles of these genes, two different S. viridis accessions (A10.1 and Ast-1) were submitted to drought, salinity and cold stresses, in addition to application of exogenous ABA. Differential gene expression profiles were observed in each treatment and plant genotype, demonstrating variations of ABA stress responses within the same species. These differential responses to stresses were also assessed by physiological measurements such as photosynthesis, stomatal conductance and transpiration rate. This study allows a detailed analysis of gene expression of the core ABA signaling components in Setaria viridis submitted to different treatments and provides suitable targets for genetic engineering of C4 plants aiming tolerance to abiotic stresses.
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Affiliation(s)
- Karoline Estefani Duarte
- Plant Biotechnology Program, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil.,Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil
| | - Wagner Rodrigo de Souza
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil.,Centro de Ciências Naturais e Humanas, Universidade Federal do ABC (UFABC), São Bernardo do Campo, Santo André, SP, 09606-045, Brazil
| | - Thaís Ribeiro Santiago
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil
| | - Bruno Leite Sampaio
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil
| | - Ana Paula Ribeiro
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil
| | - Michelle Guitton Cotta
- Department of Cell Biology, University of Brasília (UnB), Brasília, DF, 70910-900, Brazil
| | | | - Pierre Roger René Marraccini
- Plant Biotechnology Program, Federal University of Lavras (UFLA), Lavras, MG, 37200-000, Brazil.,CIRAD, UMR AGAP (University Montpellier, CIRAD, IRD, INRA), Montpellier, 34398, France.,CIRAD, UMR IPME (University Montpellier, CIRAD, IRD, Montpellier), Agricultural Genetics Institute, LMI RICE2, Hanoi, Vietnam
| | - Adilson Kenji Kobayashi
- Genetics and Biotechnology Laboratory, Embrapa Agroenergy (CNPAE), Brasilia, DF, 70770-901, Brazil
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